From 26a029d407be480d791972afb5975cf62c9360a6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 19 Apr 2024 02:47:55 +0200 Subject: Adding upstream version 124.0.1. 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.../history_go_no_argument.html | 27 + .../the-history-interface/history_go_plus.html | 33 + .../the-history-interface/history_go_to_uri-1.html | 22 + .../the-history-interface/history_go_to_uri.html | 30 + .../history_go_undefined-1.html | 14 + .../history_go_undefined.html | 26 + .../the-history-interface/history_go_zero-1.html | 17 + .../the-history-interface/history_go_zero.html | 27 + .../history_go_zero_which_document.window.js | 27 + .../history_properties_only_fully_active.html | 23 + .../the-history-interface/history_pushstate.html | 19 + .../history_pushstate_err.html | 18 + .../history_pushstate_nooptionalparam.html | 20 + .../history_pushstate_url.html | 24 + .../history_pushstate_url_rewriting.html | 176 +++++ .../history_replacestate.html | 20 + .../history_replacestate_err.html | 18 + .../history_replacestate_nooptionalparam.html | 20 + .../the-history-interface/history_state.html | 24 + .../the-history-interface/iframe_history_go_0.html | 40 ++ .../joint_session_history/001-1.html | 72 +++ .../joint_session_history/001.html | 18 + .../joint_session_history/002-1.html | 35 + .../joint_session_history/002.html | 18 + .../joint_session_history/filler.html | 5 + .../the-history-interface/non-automated/history.js | 35 + .../non-automated/history_entry.html | 12 + .../traverse_the_history_unload_prompt_1-1.html | 18 + ...raverse_the_history_unload_prompt_1-manual.html | 31 + .../traverse_the_history_unload_prompt_2-1.html | 18 + ...raverse_the_history_unload_prompt_2-manual.html | 31 + ...erse_the_session_history_unload_prompt_1-1.html | 17 + ...the_session_history_unload_prompt_1-manual.html | 30 + .../pushstate-base.html | 18 + .../pushstate-whitespace.html | 20 + .../pushstate.html | 17 + .../replacestate-base.html | 18 + .../replacestate-whitespace.html | 20 + .../replacestate.html | 17 + .../resources/message-opener.sub.html | 8 + .../resources/traverse-during-beforeunload.html | 12 + .../resources/traverse-during-unload.html 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.../traverse_the_history_write_onload_2-1.html | 9 + .../traverse_the_history_write_onload_2.html | 27 + ...allow_prototype_cycle_through_location.sub.html | 197 ++++++ .../assign_after_load-1.html | 9 + .../assign_after_load-2.html | 7 + .../the-location-interface/assign_after_load.html | 23 + .../assign_before_load-1.html | 7 + .../assign_before_load-2.html | 7 + .../the-location-interface/assign_before_load.html | 23 + .../cross_origin_joined_frame.sub.html | 15 + .../the-location-interface/document_location.html | 39 ++ ...location-non-configurable-toString-valueOf.html | 42 ++ .../location-origin-idna.sub.window.js | 11 + .../location-pathname-setter-question-mark.html | 16 + .../location-prevent-extensions.html | 21 + .../location-protocol-setter-non-broken-weird.html | 35 + .../location-protocol-setter-non-broken.html | 63 ++ .../location-protocol-setter-sameish.html | 26 + .../location-protocol-setter-with-colon.sub.html | 52 ++ .../location-protocol-setter.html | 104 +++ .../location-prototype-no-toString-valueOf.html | 55 ++ ...-prototype-setting-cross-origin-domain.sub.html | 31 + ...ocation-prototype-setting-cross-origin.sub.html | 28 + ...otype-setting-goes-cross-origin-domain.sub.html | 39 ++ ...n-prototype-setting-same-origin-domain.sub.html | 30 + .../location-prototype-setting-same-origin.html | 21 + .../location-stringifier.html | 24 + .../location-symbol-toprimitive.html | 14 + .../the-location-interface/location-tojson.html | 13 + .../the-location-interface/location-valueof.html | 15 + .../the-location-interface/location_assign.html | 26 + .../location_assign_about_blank-1.html | 2 + .../location_assign_about_blank.html | 24 + .../the-location-interface/location_hash.html | 62 ++ .../the-location-interface/location_host.html | 28 + .../the-location-interface/location_hostname.html | 33 + .../the-location-interface/location_href.html | 19 + .../the-location-interface/location_origin.html | 14 + 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.../introduction-4/event_downloading-manual.html | 23 + .../offline/introduction-4/event_error-manual.html | 23 + .../introduction-4/event_obsolete-manual.html | 23 + .../introduction-4/event_updateready-manual.html | 22 + .../event_updateready_swapcache-manual.html | 30 + .../offline/manifest_main_empty-manual.https.html | 14 + .../manifest_notchanged_online-manual.https.html | 19 + .../manifest_section_empty-manual.https.html | 19 + .../manifest_section_many-manual.https.html | 19 + .../html/browsers/offline/resources/css/clock.css | 1 + .../browsers/offline/resources/css/offline.css | 5 + .../html/browsers/offline/resources/css/online.css | 5 + .../html/browsers/offline/resources/css/result.css | 11 + .../browsers/offline/resources/html/clock.html | 12 + .../html/browsers/offline/resources/js/clock.js | 3 + .../offline/resources/manifest/clock.manifest | 17 + .../resources/manifest/section_empty.manifest | 10 + .../resources/manifest/section_many.manifest | 19 + .../offline/resources/manifest/url_check.manifest | 17 + .../section_network_offline-manual.https.html | 17 + .../section_network_online-manual.https.html | 16 + .../cross-origin-due-to-document-domain-only.html | 33 + .../cross-origin-objects-function-caching.html | 49 ++ .../cross-origin-objects-function-common.js | 34 + .../cross-origin-objects-function-length.html | 45 ++ .../cross-origin-objects-function-name.html | 45 ++ .../cross-origin-objects-on-new-window.html | 25 + .../cross-origin-objects/cross-origin-objects.html | 718 +++++++++++++++++++++ .../cross-origin-objects/frame-with-then.html | 19 + .../origin/cross-origin-objects/frame.html | 51 ++ .../location-properties-smoke-test.window.js | 51 ++ ...-origin-due-to-document-domain-only-helper.html | 9 + .../win-documentdomain.sub.html | 63 ++ ...location-and-location-href-cross-realm-set.html | 106 +++ .../origin/inheritance/about-blank-iframe.html | 28 + .../origin/inheritance/about-blank-window.html | 25 + .../browsers/origin/inheritance/about-srcdoc.html | 29 + .../inheritance/document-write.https.window.js | 10 + .../document-write.https.window.js.headers | 1 + .../origin/inheritance/javascript-url.html | 33 + .../inheritance/resources/document-write.html | 40 ++ .../resources/document-write.html.headers | 1 + .../resources/iframe-with-about-blank-iframe.html | 7 + .../iframe-with-about-blank-iframe.html.headers | 1 + .../parent-no-child-bad-subdomain.sub.https.html | 27 + .../parent-no-child-yes-port.sub.https.html | 27 + .../parent-no-child-yes-same.sub.https.html | 27 + ...hild-yes-subdomain-with-redirect.sub.https.html | 27 + .../parent-no-child-yes-subdomain.sub.https.html | 27 + ...no-child-yeswithparams-subdomain.sub.https.html | 27 + .../parent-yes-child-no-port.sub.https.html | 27 + ...parent-yes-child-no-port.sub.https.html.headers | 1 + .../parent-yes-child-no-same.sub.https.html | 26 + ...parent-yes-child-no-same.sub.https.html.headers | 1 + .../parent-yes-child-no-subdomain.sub.https.html | 27 + ...t-yes-child-no-subdomain.sub.https.html.headers | 1 + .../parent-yes-child-yes-port.sub.https.html | 27 + ...arent-yes-child-yes-port.sub.https.html.headers | 1 + .../parent-yes-child-yes-same.sub.https.html | 26 + ...arent-yes-child-yes-same.sub.https.html.headers | 1 + .../parent-yes-child-yes-subdomain.sub.https.html | 27 + ...-yes-child-yes-subdomain.sub.https.html.headers | 1 + ...o-subdomain-child2-yes-subdomain.sub.https.html | 36 ++ ...bdomain-child2-yes-subdomainport.sub.https.html | 37 ++ ...subdomain1-child2-yes-subdomain2.sub.https.html | 37 ++ ...ld1-yes-subdomain-child2-no-port.sub.https.html | 37 ++ ...es-subdomain-child2-no-subdomain.sub.https.html | 38 ++ ...no-subdomain-child2-no-subdomain.sub.https.html | 38 ++ ...main-child2-no-subdomain.sub.https.html.headers | 1 + ...o-subdomain-child2-no-subdomain2.sub.https.html | 38 ++ ...ain-child2-no-subdomain2.sub.https.html.headers | 1 + ...o-subdomain-child2-yes-subdomain.sub.https.html | 38 ++ ...ain-child2-yes-subdomain.sub.https.html.headers | 1 + ...-subdomain-child2-yes-subdomain2.sub.https.html | 38 ++ ...in-child2-yes-subdomain2.sub.https.html.headers | 1 + ...bdomain-child2-yes-subdomainport.sub.https.html | 38 ++ ...child2-yes-subdomainport.sub.https.html.headers | 1 + ...ld1-yes-subdomain-child2-no-port.sub.https.html | 36 ++ ...subdomain-child2-no-port.sub.https.html.headers | 1 + ...es-subdomain-child2-no-subdomain.sub.https.html | 38 ++ ...main-child2-no-subdomain.sub.https.html.headers | 1 + ...s-subdomain-child2-yes-subdomain.sub.https.html | 39 ++ ...ain-child2-yes-subdomain.sub.https.html.headers | 1 + ...-subdomain-child2-yes-subdomain2.sub.https.html | 38 ++ ...in-child2-yes-subdomain2.sub.https.html.headers | 1 + ...bdomain-child2-yes-subdomainport.sub.https.html | 38 ++ ...child2-yes-subdomainport.sub.https.html.headers | 1 + .../origin/origin-keyed-agent-clusters/META.yml | 5 + .../origin/origin-keyed-agent-clusters/README.md | 30 + .../about-blank.https.sub.html | 63 ++ .../about-blank.https.sub.html.headers | 1 + .../document-domain.sub.https.html | 52 ++ .../document-domain.sub.https.html.headers | 1 + .../cross-origin-isolated.sub.https.html | 28 + .../cross-origin-isolated.sub.https.html.headers | 2 + .../getter-special-cases/csp-sandbox-no.https.html | 15 + .../csp-sandbox-no.https.html.headers | 1 + .../csp-sandbox-yes.https.html | 15 + .../csp-sandbox-yes.https.html.headers | 2 + .../data-to-javascript-no.https.html | 12 + .../data-to-javascript-yes.https.html | 12 + .../data-to-javascript-yes.https.html.headers | 1 + .../getter-special-cases/data-url-no.https.html | 12 + .../getter-special-cases/data-url-yes.https.html | 12 + .../data-url-yes.https.html.headers | 1 + .../javascript-url-no.https.html | 12 + .../javascript-url-yes.https.html | 12 + .../javascript-url-yes.https.html.headers | 1 + .../removed-iframe.sub.https.html | 27 + .../removed-iframe.sub.https.html.headers | 1 + .../resources/data-to-javascript-test.mjs | 33 + .../resources/data-url-test.mjs | 13 + .../getter-special-cases/resources/helpers.mjs | 28 + .../resources/javascript-url-test.mjs | 14 + .../resources/sandboxed-iframe-test.sub.mjs | 20 + .../sandboxed-same-origin-iframe-test.sub.mjs | 20 + .../sandboxed-iframe-no.https.html | 12 + .../sandboxed-iframe-yes.https.html | 12 + .../sandboxed-iframe-yes.https.html.headers | 1 + .../sandboxed-same-origin-iframe-no.https.html | 12 + .../sandboxed-same-origin-iframe-yes.https.html | 12 + ...boxed-same-origin-iframe-yes.https.html.headers | 1 + .../going-back.sub.https.html | 62 ++ .../going-back.sub.https.html.headers | 1 + .../parent-no-1-no-same-2-yes-port.sub.https.html | 41 ++ ...ent-no-1-no-same-2-yes-subdomain.sub.https.html | 41 ++ ...o-1-no-subdomain-2-yes-subdomain.sub.https.html | 40 ++ ...-1-no-subdomain-2-yes-subdomain2.sub.https.html | 41 ++ ...-1-subdomain-yes-2-subdomain2-no.sub.https.html | 43 ++ ...o-1-yes-subdomain-2-no-subdomain.sub.https.html | 41 ++ .../parent-yes-1-no-same-2-no-port.sub.https.html | 41 ++ ...-yes-1-no-same-2-no-port.sub.https.html.headers | 1 + ...ent-yes-1-no-same-2-no-subdomain.sub.https.html | 41 ++ ...1-no-same-2-no-subdomain.sub.https.html.headers | 1 + .../insecure-http.sub.html | 26 + .../insecure-http.sub.html.headers | 1 + .../popups-crash.https.html | 9 + .../opener-no-openee-yes-port.sub.https.html | 28 + .../opener-no-openee-yes-same.sub.https.html | 27 + .../opener-no-openee-yes-subdomain.sub.https.html | 28 + .../opener-yes-openee-no-port.sub.https.html | 28 + ...pener-yes-openee-no-port.sub.https.html.headers | 1 + .../opener-yes-openee-no-same.sub.https.html | 27 + ...pener-yes-openee-no-same.sub.https.html.headers | 1 + .../opener-yes-openee-no-subdomain.sub.https.html | 28 + ...-yes-openee-no-subdomain.sub.https.html.headers | 1 + .../opener-yes-openee-yes-port.sub.https.html | 28 + ...ener-yes-openee-yes-port.sub.https.html.headers | 1 + .../opener-yes-openee-yes-same.sub.https.html | 27 + ...ener-yes-openee-yes-same.sub.https.html.headers | 1 + .../opener-yes-openee-yes-subdomain.sub.https.html | 28 + ...yes-openee-yes-subdomain.sub.https.html.headers | 1 + .../regression-1399759.https.sub.html | 100 +++ .../removing-iframes.sub.https.html | 46 ++ .../removing-iframes.sub.https.html.headers | 1 + .../resources/README.md | 6 + .../resources/coep-frame.html | 5 + .../resources/coep-frame.html.headers | 2 + .../resources/crashy-popup.sub.html | 6 + .../resources/crashy-popup.sub.html.headers | 1 + .../resources/frame.html | 12 + .../resources/frame.html.headers | 1 + .../resources/helpers.mjs | 390 +++++++++++ .../resources/helpers.mjs.headers | 1 + .../resources/send-header-page-script.mjs | 63 ++ .../resources/send-header-page-script.mjs.headers | 1 + .../resources/send-oac-header.py | 43 ++ .../browsers/origin/origin-of-data-document.html | 30 + .../document_domain.html | 35 + .../document_domain_access_details.sub.html | 305 +++++++++ .../document_domain_setter.html | 76 +++ .../document_domain_setter_srcdoc.html | 84 +++ .../sandboxed-document_domain.html | 21 + .../sandboxed-document_domain.html.headers | 1 + .../support/document_domain_frame.html | 52 ++ .../support/document_domain_frame.sub.js | 65 ++ .../support/document_domain_setter_iframe.html | 12 + .../html/browsers/sandboxing/inner-iframe.html | 13 + .../html/browsers/sandboxing/noscript-iframe.html | 3 + ...from-initial-empty-sandboxed-document.window.js | 46 ++ .../sandboxing/resources/check-sandbox-flags.html | 8 + .../sandboxing/resources/document-open.html | 14 + .../sandboxing/resources/execute-postmessage.html | 5 + .../sandboxing/resources/post-done-to-opener.html | 3 + ...x-inherited-from-initiator-response-helper.html | 15 + ...ted-from-initiator-response-helper.html.headers | 1 + .../resources/sandbox-javascript-window-open.html | 18 + 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diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/README.md b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/README.md new file mode 100644 index 0000000000..afda8f6c8a --- /dev/null +++ b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/README.md @@ -0,0 +1,60 @@ +# How to write back-forward cache tests + +In the back-forward cache tests, the main test HTML usually: + +1. Opens new executor Windows using `window.open()` + `noopener` option, + because less isolated Windows (e.g. iframes and `window.open()` without + `noopener` option) are often not eligible for back-forward cache (e.g. + in Chromium). +2. Injects scripts to the executor Windows and receives the results via + `RemoteContext.execute_script()` by + [/common/dispatcher](../../../../common/dispatcher/README.md). + Follow the semantics and guideline described there. + +Back-forward cache specific helpers are in: + +- [resources/executor.html](resources/executor.html): + The BFCache-specific executor and contains helpers for executors. +- [resources/helper.sub.js](resources/helper.sub.js): + Helpers for main test HTMLs. + +We must ensure that injected scripts are evaluated only after page load +(more precisely, the first `pageshow` event) and not during navigation, +to prevent unexpected interference between injected scripts, in-flight fetch +requests behind `RemoteContext.execute_script()`, navigation and back-forward +cache. To ensure this, + +- Call `await remoteContext.execute_script(waitForPageShow)` before any + other scripts are injected to the remote context, and +- Call `prepareNavigation(callback)` synchronously from the script injected + by `RemoteContext.execute_script()`, and trigger navigation on or after the + callback is called. + +In typical A-B-A scenarios (where we navigate from Page A to Page B and then +navigate back to Page A, assuming Page A is (or isn't) in BFCache), + +- Call `prepareNavigation()` on the executor, and then navigate to B, and then + navigate back to Page A. +- Call `assert_bfcached()` or `assert_not_bfcached()` on the main test HTML, to + check the BFCache status. This is important to do to ensure the test would + not fail normally and instead result in `PRECONDITION_FAILED` if the page is + unexpectedly bfcached/not bfcached. +- Check other test expectations on the main test HTML, + +as in [events.html](./events.html) and `runEventTest()` in +[resources/helper.sub.js](resources/helper.sub.js). + +# Asserting PRECONDITION_FAILED for unexpected BFCache eligibility + +Browsers are not actually obliged to put pages in BFCache after navigations, so +BFCache WPTs shouldn't result in `FAILED` if it expects a certain case to be +supported by BFCache. But, it is still useful to test those cases in the +browsers that do support BFCache for that case. + +To distinguish genuine failures from just not using BFCache, we use +`assert_bfcached()` and `assert_not_bfcached()` which result in +`PRECONDITION_FAILED` rather than `FAILED`. that should be put in the +expectations for the failing tests (instead of marking it as `FAILED` or +skipping the test). This means if the test starts passing (e.g. if we start +BFCaching in the case being tested), we will notice that the output changed from +`PRECONDITION_FAILED` to `PASS`. diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/eligibility/broadcast-channel.html b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/eligibility/broadcast-channel.html new file mode 100644 index 0000000000..bc04a5ed7f --- /dev/null +++ b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/eligibility/broadcast-channel.html @@ -0,0 +1,23 @@ + + + + + + + diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/eligibility/dedicated-worker.html b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/eligibility/dedicated-worker.html new file mode 100644 index 0000000000..b08588a8bd --- /dev/null +++ b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/eligibility/dedicated-worker.html @@ -0,0 +1,25 @@ + + + + + + + + diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/eligibility/inflight-fetch-1.html b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/eligibility/inflight-fetch-1.html new file mode 100644 index 0000000000..6a48d0657b --- /dev/null +++ b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/eligibility/inflight-fetch-1.html @@ -0,0 +1,18 @@ + + + + + + + + + diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/eligibility/inflight-fetch-2.html b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/eligibility/inflight-fetch-2.html new file mode 100644 index 0000000000..a767c4fa83 --- /dev/null +++ b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/eligibility/inflight-fetch-2.html @@ -0,0 +1,22 @@ + + + + + + + + + diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/eligibility/inflight-fetch-cors.html b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/eligibility/inflight-fetch-cors.html new file mode 100644 index 0000000000..c04089a5e2 --- /dev/null +++ b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/eligibility/inflight-fetch-cors.html @@ -0,0 +1,18 @@ + + + + + + + + + diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/eligibility/inflight-fetch-redirects.html b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/eligibility/inflight-fetch-redirects.html new file mode 100644 index 0000000000..b0b49d5f12 --- /dev/null +++ b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/eligibility/inflight-fetch-redirects.html @@ -0,0 +1,34 @@ + + + + + + + + + diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/eligibility/shared-worker.html b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/eligibility/shared-worker.html new file mode 100644 index 0000000000..77139fd08a --- /dev/null +++ b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/eligibility/shared-worker.html @@ -0,0 +1,25 @@ + + + + + + + + diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/events.html b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/events.html new file mode 100644 index 0000000000..4b1d3e408e --- /dev/null +++ b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/events.html @@ -0,0 +1,44 @@ + + + + + + + + diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/focus.html b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/focus.html new file mode 100644 index 0000000000..3901a5417d --- /dev/null +++ b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/focus.html @@ -0,0 +1,73 @@ + + + + + + + + + diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/pushstate.https.html b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/pushstate.https.html new file mode 100644 index 0000000000..218562254a --- /dev/null +++ b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/pushstate.https.html @@ -0,0 +1,63 @@ + + + + + + + + diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/echo-worker.js b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/echo-worker.js new file mode 100644 index 0000000000..3e3ecb52e9 --- /dev/null +++ b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/echo-worker.js @@ -0,0 +1,16 @@ +// On receiving a message from the parent Document, send back a message to the +// parent Document. This is used to wait for worker initialization and test +// that this worker is alive and working. + +// For dedicated workers. +self.addEventListener('message', event => { + postMessage(event.data); +}); + +// For shared workers. +onconnect = e => { + const port = e.ports[0]; + port.onmessage = event => { + port.postMessage(event.data); + } +}; diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/event-recorder.js b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/event-recorder.js new file mode 100644 index 0000000000..469286a399 --- /dev/null +++ b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/event-recorder.js @@ -0,0 +1,54 @@ +// Recording events + +const params = new URLSearchParams(window.location.search); +const uuid = params.get('uuid'); + +// The recorded events are stored in localStorage rather than global variables +// to catch events fired just before navigating out. +function getPushedItems(key) { + return JSON.parse(localStorage.getItem(key) || '[]'); +} + +function pushItem(key, value) { + const array = getPushedItems(key); + array.push(value); + localStorage.setItem(key, JSON.stringify(array)); +} + +window.recordEvent = function(eventName) { + pushItem(uuid + '.observedEvents', eventName); +} + +window.getRecordedEvents = function() { + return getPushedItems(uuid + '.observedEvents'); +} + +// Records events fired on `window` and `document`, with names listed in +// `eventNames`. +function startRecordingEvents(eventNames) { + for (const eventName of eventNames) { + window.addEventListener(eventName, event => { + let result = eventName; + if (event.persisted) { + result += '.persisted'; + } + if (eventName === 'visibilitychange') { + result += '.' + document.visibilityState; + } + recordEvent('window.' + result); + }); + document.addEventListener(eventName, () => { + let result = eventName; + if (eventName === 'visibilitychange') { + result += '.' + document.visibilityState; + } + recordEvent('document.' + result); + }); + } +} + +// When a comma-separated list of event names are given as the `events` +// parameter in the URL, start record the events of the given names. +if (params.get('events')) { + startRecordingEvents(params.get('events').split(',')); +} diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/executor-pushstate.html b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/executor-pushstate.html new file mode 100644 index 0000000000..dcf4a798d0 --- /dev/null +++ b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/executor-pushstate.html @@ -0,0 +1,13 @@ + + + + + + diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/executor.html b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/executor.html new file mode 100644 index 0000000000..2d118bbe2b --- /dev/null +++ b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/executor.html @@ -0,0 +1,5 @@ + + + + + diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/executor.js b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/executor.js new file mode 100644 index 0000000000..67ce068130 --- /dev/null +++ b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/executor.js @@ -0,0 +1,64 @@ +const params = new URLSearchParams(window.location.search); +const uuid = params.get('uuid'); + +// Executor and BFCache detection + +// When navigating out from this page, always call +// `prepareNavigation(callback)` synchronously from the script injected by +// `RemoteContext.execute_script()`, and trigger navigation on or after the +// callback is called. +// prepareNavigation() suspends task polling and avoid in-flight fetch +// requests during navigation that might evict the page from BFCache. +// +// When we navigate to the page again, task polling is resumed, either +// - (BFCache cases) when the pageshow event listener added by +// prepareNavigation() is executed, or +// - (Non-BFCache cases) when `Executor.execute()` is called again during +// non-BFCache page loading. +// +// In such scenarios, `assert_bfcached()` etc. in `helper.sub.js` can determine +// whether the page is restored from BFCache or not, by observing +// - `isPageshowFired`: whether the pageshow event listener added by the +// prepareNavigation() before navigating out, and +// - `loadCount`: whether this inline script is evaluated again. +// - `isPageshowPersisted` is used to assert that `event.persisted` is true +// when restored from BFCache. + +window.isPageshowFired = false; +window.isPageshowPersisted = null; +window.loadCount = parseInt(localStorage.getItem(uuid + '.loadCount') || '0') + 1; +localStorage.setItem(uuid + '.loadCount', loadCount); + +window.pageShowPromise = new Promise(resolve => + window.addEventListener('pageshow', resolve, {once: true})); + +const executor = new Executor(uuid); + +window.prepareNavigation = function(callback) { + window.addEventListener( + 'pageshow', + (event) => { + window.isPageshowFired = true; + window.isPageshowPersisted = event.persisted; + executor.resume(); + }, + {once: true}); + executor.suspend(callback); +} + +// Try to disable BFCache by acquiring and never releasing a Web Lock. +// This requires HTTPS. +// Note: This is a workaround depending on non-specified WebLock+BFCache +// behavior, and doesn't work on Safari. We might want to introduce a +// test-only BFCache-disabling API instead in the future. +// https://github.com/web-platform-tests/wpt/issues/16359#issuecomment-795004780 +// https://crbug.com/1298336 +window.disableBFCache = () => { + return new Promise(resolve => { + // Use page's UUID as a unique lock name. + navigator.locks.request(uuid, () => { + resolve(); + return new Promise(() => {}); + }); + }); +}; diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/helper.sub.js b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/helper.sub.js new file mode 100644 index 0000000000..a1d18d108e --- /dev/null +++ b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/helper.sub.js @@ -0,0 +1,229 @@ +// Helpers called on the main test HTMLs. +// Functions in `RemoteContext.execute_script()`'s 1st argument are evaluated +// on the executors (`executor.html`), and helpers available on the executors +// are defined in `executor.html`. + +const originSameOrigin = + location.protocol === 'http:' ? + 'http://{{host}}:{{ports[http][0]}}' : + 'https://{{host}}:{{ports[https][0]}}'; +const originSameSite = + location.protocol === 'http:' ? + 'http://{{host}}:{{ports[http][1]}}' : + 'https://{{host}}:{{ports[https][1]}}'; +const originCrossSite = + location.protocol === 'http:' ? + 'http://{{hosts[alt][www]}}:{{ports[http][0]}}' : + 'https://{{hosts[alt][www]}}:{{ports[https][0]}}'; + +const executorPath = + '/html/browsers/browsing-the-web/back-forward-cache/resources/executor.html?uuid='; + +// Asserts that the executor `target` is (or isn't, respectively) +// restored from BFCache. These should be used in the following fashion: +// 1. Call prepareNavigation() on the executor `target`. +// 2. Navigate the executor to another page. +// 3. Navigate back to the executor `target`. +// 4. Call assert_bfcached() or assert_not_bfcached() on the main test HTML. +async function assert_bfcached(target) { + const status = await getBFCachedStatus(target); + assert_implements_optional(status === 'BFCached', + "Could have been BFCached but actually wasn't"); +} + +async function assert_not_bfcached(target) { + const status = await getBFCachedStatus(target); + assert_implements(status !== 'BFCached', + 'Should not be BFCached but actually was'); +} + +async function getBFCachedStatus(target) { + const [loadCount, isPageshowFired, isPageshowPersisted] = + await target.execute_script(() => [ + window.loadCount, window.isPageshowFired, window.isPageshowPersisted]); + + if (loadCount === 1 && isPageshowFired === true && + isPageshowPersisted === true) { + return 'BFCached'; + } else if (loadCount === 2 && isPageshowFired === false) { + return 'Not BFCached'; + } else { + // This can occur for example when this is called before first navigating + // away (loadCount = 1, isPageshowFired = false), e.g. when + // 1. sending a script for navigation and then + // 2. calling getBFCachedStatus() without waiting for the completion of + // the script on the `target` page. + assert_unreached( + `Got unexpected BFCache status: loadCount = ${loadCount}, ` + + `isPageshowFired = ${isPageshowFired}, ` + + `isPageshowPersisted = ${isPageshowPersisted}`); + } +} + +// Always call `await remoteContext.execute_script(waitForPageShow);` after +// triggering to navigation to the page, to wait for pageshow event on the +// remote context. +const waitForPageShow = () => window.pageShowPromise; + +// Run a test that navigates A->B->A: +// 1. Page A is opened by `params.openFunc(url)`. +// 2. `params.funcBeforeNavigation(params.argsBeforeNavigation)` is executed +// on page A. +// 3. The window is navigated to page B on `params.targetOrigin`. +// 4. The window is back navigated to page A (expecting BFCached). +// +// Events `params.events` (an array of strings) are observed on page A and +// `params.expectedEvents` (an array of strings) is expected to be recorded. +// See `event-recorder.js` for event recording. +// +// Parameters can be omitted. See `defaultParams` below for default. +function runEventTest(params, description) { + const defaultParams = { + openFunc(url) { + window.open( + `${url}&events=${this.events.join(',')}`, + '_blank', + 'noopener' + ) + }, + events: ['pagehide', 'pageshow', 'load'], + expectedEvents: [ + 'window.load', + 'window.pageshow', + 'window.pagehide.persisted', + 'window.pageshow.persisted' + ], + async funcAfterAssertion(pageA) { + assert_array_equals( + await pageA.execute_script(() => getRecordedEvents()), + this.expectedEvents); + } + } + // Apply defaults. + params = { ...defaultParams, ...params }; + + runBfcacheTest(params, description); +} + +async function navigateAndThenBack(pageA, pageB, urlB, + funcBeforeBackNavigation, + argsBeforeBackNavigation) { + await pageA.execute_script( + (url) => { + prepareNavigation(() => { + location.href = url; + }); + }, + [urlB] + ); + + await pageB.execute_script(waitForPageShow); + if (funcBeforeBackNavigation) { + await pageB.execute_script(funcBeforeBackNavigation, + argsBeforeBackNavigation); + } + await pageB.execute_script( + () => { + prepareNavigation(() => { history.back(); }); + } + ); + + await pageA.execute_script(waitForPageShow); +} + +function runBfcacheTest(params, description) { + const defaultParams = { + openFunc: url => window.open(url, '_blank', 'noopener'), + scripts: [], + funcBeforeNavigation: () => {}, + argsBeforeNavigation: [], + targetOrigin: originCrossSite, + funcBeforeBackNavigation: () => {}, + argsBeforeBackNavigation: [], + shouldBeCached: true, + funcAfterAssertion: () => {}, + } + // Apply defaults. + params = {...defaultParams, ...params }; + + promise_test(async t => { + const pageA = new RemoteContext(token()); + const pageB = new RemoteContext(token()); + + const urlA = executorPath + pageA.context_id; + const urlB = params.targetOrigin + executorPath + pageB.context_id; + + // So that tests can refer to these URLs for assertions if necessary. + pageA.url = originSameOrigin + urlA; + pageB.url = urlB; + + params.openFunc(urlA); + + await pageA.execute_script(waitForPageShow); + + for (const src of params.scripts) { + await pageA.execute_script((src) => { + const script = document.createElement("script"); + script.src = src; + document.head.append(script); + return new Promise(resolve => script.onload = resolve); + }, [src]); + } + + await pageA.execute_script(params.funcBeforeNavigation, + params.argsBeforeNavigation); + await navigateAndThenBack(pageA, pageB, urlB, + params.funcBeforeBackNavigation, + params.argsBeforeBackNavigation); + + if (params.shouldBeCached) { + await assert_bfcached(pageA); + } else { + await assert_not_bfcached(pageA); + } + + if (params.funcAfterAssertion) { + await params.funcAfterAssertion(pageA, pageB, t); + } + }, description); +} + +// Call clients.claim() on the service worker +async function claim(t, worker) { + const channel = new MessageChannel(); + const saw_message = new Promise(function(resolve) { + channel.port1.onmessage = t.step_func(function(e) { + assert_equals(e.data, 'PASS', 'Worker call to claim() should fulfill.'); + resolve(); + }); + }); + worker.postMessage({type: "claim", port: channel.port2}, [channel.port2]); + await saw_message; +} + +// Assigns the current client to a local variable on the service worker. +async function storeClients(t, worker) { + const channel = new MessageChannel(); + const saw_message = new Promise(function(resolve) { + channel.port1.onmessage = t.step_func(function(e) { + assert_equals(e.data, 'PASS', 'storeClients'); + resolve(); + }); + }); + worker.postMessage({type: "storeClients", port: channel.port2}, [channel.port2]); + await saw_message; +} + +// Call storedClients.postMessage("") on the service worker +async function postMessageToStoredClients(t, worker) { + const channel = new MessageChannel(); + const saw_message = new Promise(function(resolve) { + channel.port1.onmessage = t.step_func(function(e) { + assert_equals(e.data, 'PASS', 'postMessageToStoredClients'); + resolve(); + }); + }); + worker.postMessage({type: "postMessageToStoredClients", + port: channel.port2}, [channel.port2]); + await saw_message; +} diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/inflight-fetch-helper.js b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/inflight-fetch-helper.js new file mode 100644 index 0000000000..7832003b76 --- /dev/null +++ b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/inflight-fetch-helper.js @@ -0,0 +1,47 @@ +// Delay after fetch start: +// - 0.0 seconds: before BFCache +// - 2.0 seconds: when in BFCache +// - 3.5 seconds: after restored from BFCache +function runTest(urlToFetch, hasCSP, shouldSucceed, description) { + runBfcacheTest({ + funcBeforeNavigation: async (urlToFetch, hasCSP) => { + if (hasCSP) { + // Set CSP. + const meta = document.createElement('meta'); + meta.setAttribute('http-equiv', 'Content-Security-Policy'); + meta.setAttribute('content', "connect-src 'self'"); + document.head.appendChild(meta); + } + + // Initiate a `fetch()`. + window.fetchPromise = fetch(urlToFetch); + + // Wait for 0.5 seconds to receive response headers for the fetch() + // before BFCache, if any. + await new Promise(resolve => setTimeout(resolve, 500)); + }, + argsBeforeNavigation: [urlToFetch, hasCSP], + funcBeforeBackNavigation: () => { + // Wait for 2 seconds before back navigating to pageA. + return new Promise(resolve => setTimeout(resolve, 2000)); + }, + funcAfterAssertion: async (pageA, pageB, t) => { + // Wait for fetch() completion and check the result. + const result = pageA.execute_script( + () => window.fetchPromise.then(r => r.text())); + if (shouldSucceed) { + assert_equals( + await result, + 'Body', + 'Fetch should complete successfully after restored from BFCache'); + } else { + await promise_rejects_js(t, TypeError, result, + 'Fetch should fail after restored from BFCache'); + } + } + }, 'Eligibility (in-flight fetch): ' + description); +} + +const url = new URL('../resources/slow.py', location); +const sameOriginUrl = url.href; +const crossSiteUrl = originCrossSite + url.pathname; diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/rc-helper.js b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/rc-helper.js new file mode 100644 index 0000000000..80c164f560 --- /dev/null +++ b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/rc-helper.js @@ -0,0 +1,137 @@ +// A collection of helper functions that make use of the `remoteContextHelper` +// to test BFCache support and behavior. + +// Call `prepareForBFCache()` before navigating away from the page. This simply +// sets a variable in window. +async function prepareForBFCache(remoteContextHelper) { + await remoteContextHelper.executeScript(() => { + window.beforeBFCache = true; + }); +} + +// Call `getBeforeCache()` after navigating back to the page. This returns the +// value in window. +async function getBeforeBFCache(remoteContextHelper) { + return await remoteContextHelper.executeScript(() => { + return window.beforeBFCache; + }); +} + +// If the value in window is set to true, this means that the page was reloaded, +// i.e., the page was restored from BFCache. +// Call `prepareForBFCache()` before navigating away to call this function. +async function assertImplementsBFCacheOptional(remoteContextHelper) { + var beforeBFCache = await getBeforeBFCache(remoteContextHelper); + assert_implements_optional(beforeBFCache == true, 'BFCache not supported.'); +} + +// Subtracts set `b` from set `a` and returns the result. +function setMinus(a, b) { + const minus = new Set(); + a.forEach(e => { + if (!b.has(e)) { + minus.add(e); + } + }); + return minus; +} + +// Return a sorted Array from the iterable `s`. +function sorted(s) { + return Array.from(s).sort(); +} + +// Assert expected reasons and the reported reasons match. +function matchReasons(expectedNotRestoredReasonsSet, notRestoredReasonsSet) { + const missing = setMinus( + expectedNotRestoredReasonsSet, notRestoredReasonsSet, 'Missing reasons'); + const extra = setMinus( + notRestoredReasonsSet, expectedNotRestoredReasonsSet, 'Extra reasons'); + assert_true(missing.size + extra.size == 0, `Expected: ${sorted(expectedNotRestoredReasonsSet)}\n` + + `Got: ${sorted(notRestoredReasonsSet)}\n` + + `Missing: ${sorted(missing)}\n` + + `Extra: ${sorted(extra)}\n`); +} + +// This function takes a set of reasons and extracts reasons out of it and returns a set of strings. +// For example, if the input is [{"reason": "error-document"}, {"reason": "masked"}], +// the output is ["error-document", "masked"]. +function extractReason(reasonSet) { + let reasonsExtracted = new Set(); + for (let reason of reasonSet) { + reasonsExtracted.add(reason.reason); + } + return reasonsExtracted; +} + +// A helper function to assert that the page is not restored from BFCache by +// checking whether the `beforeBFCache` value from `window` is undefined +// due to page reload. +// This function also takes an optional `notRestoredReasons` list which +// indicates the set of expected reasons that make the page not restored. +// If the reasons list is undefined, the check will be skipped. Otherwise +// this check will use the `notRestoredReasons` API, to obtain the reasons +// in a tree structure, and flatten the reasons before making the order- +// insensitive comparison. +// If the API is not available, the function will terminate instead of marking +// the assertion failed. +// Call `prepareForBFCache()` before navigating away to call this function. +async function assertNotRestoredFromBFCache( + remoteContextHelper, notRestoredReasons) { + var beforeBFCache = await getBeforeBFCache(remoteContextHelper); + assert_equals(beforeBFCache, undefined, 'document unexpectedly BFCached'); + + // The reason is optional, so skip the remaining test if the + // `notRestoredReasons` is not set. + if (notRestoredReasons === undefined) { + return; + } + + let isFeatureEnabled = await remoteContextHelper.executeScript(() => { + return 'notRestoredReasons' in + performance.getEntriesByType('navigation')[0]; + }); + + // Return if the `notRestoredReasons` API is not available. + if (!isFeatureEnabled) { + return; + } + + let result = await remoteContextHelper.executeScript(() => { + return performance.getEntriesByType('navigation')[0].notRestoredReasons; + }); + + let expectedNotRestoredReasonsSet = new Set(notRestoredReasons); + let notRestoredReasonsSet = new Set(); + + // Flatten the reasons from the main frame and all the child frames. + const collectReason = (node) => { + for (let reason of node.reasons) { + notRestoredReasonsSet.add(reason.reason); + } + for (let child of node.children) { + collectReason(child); + } + }; + collectReason(result); + matchReasons(expectedNotRestoredReasonsSet, notRestoredReasonsSet); +} + +// A helper function that combines the steps of setting window property, +// navigating away and back, and making assertion on whether BFCache is +// supported. +// This function can be used to check if the current page is eligible for +// BFCache. +async function assertBFCacheEligibility( + remoteContextHelper, shouldRestoreFromBFCache) { + await prepareForBFCache(remoteContextHelper); + // Navigate away and back. + const newRemoteContextHelper = await remoteContextHelper.navigateToNew(); + await newRemoteContextHelper.historyBack(); + + if (shouldRestoreFromBFCache) { + await assertImplementsBFCacheOptional(remoteContextHelper); + } else { + await assertNotRestoredFromBFCache(remoteContextHelper); + } +} diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/service-worker.js b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/service-worker.js new file mode 100644 index 0000000000..ab9a3239ea --- /dev/null +++ b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/service-worker.js @@ -0,0 +1,58 @@ +self.addEventListener('message', function(event) { + if (event.data.type == "claim") { + self.clients.claim() + .then(function(result) { + if (result !== undefined) { + event.data.port.postMessage( + 'FAIL: claim() should be resolved with undefined'); + return; + } + event.data.port.postMessage('PASS'); + }) + .catch(function(error) { + event.data.port.postMessage('FAIL: exception: ' + error.name); + }); + } else if (event.data.type == "storeClients") { + self.clients.matchAll() + .then(function(result) { + self.storedClients = result; + event.data.port.postMessage("PASS"); + }); + } else if (event.data.type == "postMessageToStoredClients") { + for (let client of self.storedClients) { + client.postMessage("dummyValue"); + } + event.data.port.postMessage("PASS"); + } else if (event.data.type == 'storeMessagePort') { + let isCloseEventFired = false; + const port = event.ports[0]; + port.start(); + port.onmessage = (event) => { + if (event.data == 'Confirm the ports can communicate') { + port.postMessage('Receive message'); + } else if (event.data == 'Ask if the close event was fired') { + port.postMessage(isCloseEventFired); + } + }; + port.onclose = () => { + isCloseEventFired = true; + }; + } + }); + +self.addEventListener('fetch', e => { + if (e.request.url.match(/\/is-controlled/)) { + e.respondWith(new Response('controlled')); + } + else if (e.request.url.match(/\/get-clients-matchall/)) { + const options = { includeUncontrolled: true, type: 'all' }; + e.respondWith( + self.clients.matchAll(options) + .then(clients => { + const client_urls = []; + clients.forEach(client => client_urls.push(client.url)); + return new Response(JSON.stringify(client_urls)); + }) + ); + } + }); diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/slow.py b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/slow.py new file mode 100644 index 0000000000..01bb3309b1 --- /dev/null +++ b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/slow.py @@ -0,0 +1,13 @@ +import time + +def main(request, response): + delay_before_header = float(request.GET.first(b"delayBeforeHeader", 0)) / 1000 + delay_before_body = float(request.GET.first(b"delayBeforeBody", 0)) / 1000 + + time.sleep(delay_before_header) + if b"cors" in request.GET: + response.headers.set(b"Access-Control-Allow-Origin", b"*") + response.write_status_headers() + + time.sleep(delay_before_body) + response.writer.write_content(b"Body") diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/worker-helper.js b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/worker-helper.js new file mode 100644 index 0000000000..d5f3a0c814 --- /dev/null +++ b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/worker-helper.js @@ -0,0 +1,28 @@ +// Worker-related helper file to be used from executor.html. + +// The class `WorkerHelper` is exposed to `globalThis` because this should be +// used via `eval()`. +globalThis.WorkerHelper = class { + static pingWorker(worker) { + return new Promise((resolve, reject) => { + const message = 'message ' + Math.random(); + const onmessage = e => { + if (e.data === message) { + resolve('PASS'); + } else { + reject('pingWorker: expected ' + message + ' but got ' + e.data); + } + }; + worker.onerror = reject; + if (worker instanceof Worker) { + worker.addEventListener('message', onmessage, {once: true}); + worker.postMessage(message); + } else if (worker instanceof SharedWorker) { + worker.port.onmessage = onmessage; + worker.port.postMessage(message); + } else { + reject('Unexpected worker type'); + } + }); + } +}; diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/service-worker-client-postmessage.https.html b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/service-worker-client-postmessage.https.html new file mode 100644 index 0000000000..acc682a073 --- /dev/null +++ b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/service-worker-client-postmessage.https.html @@ -0,0 +1,71 @@ + + + + + + + + + diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/service-worker-clients-claim.https.html b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/service-worker-clients-claim.https.html new file mode 100644 index 0000000000..d9540c221b --- /dev/null +++ b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/service-worker-clients-claim.https.html @@ -0,0 +1,71 @@ + + + + + + + + + diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/service-worker-clients-matchall.https.html b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/service-worker-clients-matchall.https.html new file mode 100644 index 0000000000..069529dbe4 --- /dev/null +++ b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/service-worker-clients-matchall.https.html @@ -0,0 +1,76 @@ + + + + + + + + + diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/service-worker-controlled-after-restore.https.html b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/service-worker-controlled-after-restore.https.html new file mode 100644 index 0000000000..a937eb85ac --- /dev/null +++ b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/service-worker-controlled-after-restore.https.html @@ -0,0 +1,54 @@ + + + + + + + + + diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/service-worker-unregister.https.html b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/service-worker-unregister.https.html new file mode 100644 index 0000000000..1c3f81153c --- /dev/null +++ b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/service-worker-unregister.https.html @@ -0,0 +1,67 @@ + + + + + + + + + diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/storage-events.html b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/storage-events.html new file mode 100644 index 0000000000..6957496c30 --- /dev/null +++ b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/storage-events.html @@ -0,0 +1,101 @@ + + + + + + + + diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/timers.html b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/timers.html new file mode 100644 index 0000000000..aab650f36e --- /dev/null +++ b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/timers.html @@ -0,0 +1,68 @@ + + + + + + + + + diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/001-1.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/001-1.html new file mode 100644 index 0000000000..cadcf126f5 --- /dev/null +++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/001-1.html @@ -0,0 +1,11 @@ + +001-1 + diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/001-2.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/001-2.html new file mode 100644 index 0000000000..6387bc89c8 --- /dev/null +++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/001-2.html @@ -0,0 +1,5 @@ + +001-2 + diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/001.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/001.html new file mode 100644 index 0000000000..336ede4cb6 --- /dev/null +++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/001.html @@ -0,0 +1,35 @@ + +pageshow event from traversal + + +
+ + diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/PopStateEvent.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/PopStateEvent.html new file mode 100644 index 0000000000..9ee7576249 --- /dev/null +++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/PopStateEvent.html @@ -0,0 +1,47 @@ + + +Synthetic popstate events + + +
+ diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/api-availability.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/api-availability.html new file mode 100644 index 0000000000..2f7d3fafdf --- /dev/null +++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/api-availability.html @@ -0,0 +1,22 @@ + +API availability following history traversal + + + +

Test requires popup blocker disabled

+
+ diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/browsing_context_name-0.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/browsing_context_name-0.html new file mode 100644 index 0000000000..5cbab71a5e --- /dev/null +++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/browsing_context_name-0.html @@ -0,0 +1,35 @@ + + diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/browsing_context_name-1.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/browsing_context_name-1.html new file mode 100644 index 0000000000..85748a2ebc --- /dev/null +++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/browsing_context_name-1.html @@ -0,0 +1,6 @@ +document 1 + diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/browsing_context_name-2.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/browsing_context_name-2.html new file mode 100644 index 0000000000..b0c869046b --- /dev/null +++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/browsing_context_name-2.html @@ -0,0 +1,4 @@ +document 2 + diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/browsing_context_name-3.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/browsing_context_name-3.html new file mode 100644 index 0000000000..e0c239744f --- /dev/null +++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/browsing_context_name-3.html @@ -0,0 +1,6 @@ +document 3 + diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/browsing_context_name-4.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/browsing_context_name-4.html new file mode 100644 index 0000000000..5d2dfa6bb8 --- /dev/null +++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/browsing_context_name-4.html @@ -0,0 +1,6 @@ +document 4 + diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/browsing_context_name.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/browsing_context_name.html new file mode 100644 index 0000000000..60a8acb098 --- /dev/null +++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/browsing_context_name.html @@ -0,0 +1,13 @@ + +Retaining window.name on history traversal + + +

+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/browsing_context_name_cross_origin-0.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/browsing_context_name_cross_origin-0.html
new file mode 100644
index 0000000000..9e91722714
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/browsing_context_name_cross_origin-0.html
@@ -0,0 +1,34 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/browsing_context_name_cross_origin.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/browsing_context_name_cross_origin.html
new file mode 100644
index 0000000000..caa0bce3eb
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/browsing_context_name_cross_origin.html
@@ -0,0 +1,13 @@
+
+Restoring window.name on cross-origin history traversal
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/browsing_context_name_cross_origin_2.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/browsing_context_name_cross_origin_2.html
new file mode 100644
index 0000000000..8202a892a3
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/browsing_context_name_cross_origin_2.html
@@ -0,0 +1,43 @@
+
+Restoring window.name on cross-origin history traversal
+
+
+

+

+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/browsing_context_name_cross_origin_3.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/browsing_context_name_cross_origin_3.html
new file mode 100644
index 0000000000..b6a35680dd
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/browsing_context_name_cross_origin_3.html
@@ -0,0 +1,44 @@
+
+Restoring window.name on cross-origin history traversal
+
+
+

+

+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/document-state.https.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/document-state.https.html
new file mode 100644
index 0000000000..f03efc3b65
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/document-state.https.html
@@ -0,0 +1,133 @@
+
+
+Test the properties of a session history entry's document state
+
+
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/event-order/after-load-hash-twice.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/event-order/after-load-hash-twice.html
new file mode 100644
index 0000000000..75889ef517
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/event-order/after-load-hash-twice.html
@@ -0,0 +1,38 @@
+
+
+Popstate/hashchange/load event ordering
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/event-order/after-load-hash.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/event-order/after-load-hash.html
new file mode 100644
index 0000000000..f74d716d91
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/event-order/after-load-hash.html
@@ -0,0 +1,32 @@
+
+
+Popstate/hashchange/load event ordering
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/event-order/after-load-pushState.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/event-order/after-load-pushState.html
new file mode 100644
index 0000000000..4f9f3dad47
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/event-order/after-load-pushState.html
@@ -0,0 +1,31 @@
+
+
+Popstate/hashchange/load event ordering
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/event-order/after-load-replaceState.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/event-order/after-load-replaceState.html
new file mode 100644
index 0000000000..28148ff7b2
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/event-order/after-load-replaceState.html
@@ -0,0 +1,30 @@
+
+
+Popstate/hashchange/load event ordering
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/event-order/before-load-hash-twice.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/event-order/before-load-hash-twice.html
new file mode 100644
index 0000000000..7c8df11843
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/event-order/before-load-hash-twice.html
@@ -0,0 +1,29 @@
+
+
+Popstate/hashchange/load event ordering
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/event-order/before-load-hash.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/event-order/before-load-hash.html
new file mode 100644
index 0000000000..97c4636fad
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/event-order/before-load-hash.html
@@ -0,0 +1,27 @@
+
+
+Popstate/hashchange/load event ordering
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/event-order/before-load-pushState.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/event-order/before-load-pushState.html
new file mode 100644
index 0000000000..a08afa474f
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/event-order/before-load-pushState.html
@@ -0,0 +1,28 @@
+
+
+Popstate/hashchange/load event ordering
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/event-order/before-load-replaceState.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/event-order/before-load-replaceState.html
new file mode 100644
index 0000000000..10d30038fb
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/event-order/before-load-replaceState.html
@@ -0,0 +1,26 @@
+
+
+Popstate/hashchange/load event ordering
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/event-order/pushState-inside-popstate.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/event-order/pushState-inside-popstate.html
new file mode 100644
index 0000000000..35ada116ed
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/event-order/pushState-inside-popstate.html
@@ -0,0 +1,16 @@
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/event-order/same-document-traverse-immediate.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/event-order/same-document-traverse-immediate.html
new file mode 100644
index 0000000000..51ea20b289
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/event-order/same-document-traverse-immediate.html
@@ -0,0 +1,38 @@
+
+
+Popstate/hashchange/load event ordering
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/event-order/same-document-traverse-wait.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/event-order/same-document-traverse-wait.html
new file mode 100644
index 0000000000..39bc760ff7
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/event-order/same-document-traverse-wait.html
@@ -0,0 +1,39 @@
+
+
+Popstate/hashchange/load event ordering
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/events.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/events.html
new file mode 100644
index 0000000000..d5ff83fac0
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/events.html
@@ -0,0 +1,151 @@
+
+ PageTransitionEffect Event 
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/hashchange_event.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/hashchange_event.html
new file mode 100644
index 0000000000..b7111255f8
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/hashchange_event.html
@@ -0,0 +1,49 @@
+
+Queue a task to fire hashchange event
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/history-traversal-navigate-parent-while-child-loading.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/history-traversal-navigate-parent-while-child-loading.html
new file mode 100644
index 0000000000..2b70375a14
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/history-traversal-navigate-parent-while-child-loading.html
@@ -0,0 +1,30 @@
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/history-traversal-navigates-multiple-frames.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/history-traversal-navigates-multiple-frames.html
new file mode 100644
index 0000000000..4f2429fbfd
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/history-traversal-navigates-multiple-frames.html
@@ -0,0 +1,29 @@
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pagereveal/order-in-bfcache-restore.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pagereveal/order-in-bfcache-restore.html
new file mode 100644
index 0000000000..f453c80a2a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pagereveal/order-in-bfcache-restore.html
@@ -0,0 +1,70 @@
+
+pagereveal event fires and in correct order on restoration from BFCache
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pagereveal/order-in-new-document-navigation.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pagereveal/order-in-new-document-navigation.html
new file mode 100644
index 0000000000..d2c44511d3
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pagereveal/order-in-new-document-navigation.html
@@ -0,0 +1,18 @@
+
+pagereveal event fires and in correct order on new-document navigation
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pagereveal/order-in-prerender-activation.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pagereveal/order-in-prerender-activation.html
new file mode 100644
index 0000000000..b281b2b088
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pagereveal/order-in-prerender-activation.html
@@ -0,0 +1,40 @@
+
+pagereveal event fires and in correct order on prerender activation
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pagereveal/resources/order-in-prerender-activation-popup.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pagereveal/resources/order-in-prerender-activation-popup.html
new file mode 100644
index 0000000000..78989adc17
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pagereveal/resources/order-in-prerender-activation-popup.html
@@ -0,0 +1,74 @@
+
+pagereveal event fires and in correct order on prerender activation (popup)
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/persisted-user-state-restoration/resources/blank1.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/persisted-user-state-restoration/resources/blank1.html
new file mode 100644
index 0000000000..6b4df1ef2f
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/persisted-user-state-restoration/resources/blank1.html
@@ -0,0 +1,8 @@
+
+
+ Blank 1 
\ No newline at end of file
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/persisted-user-state-restoration/resources/blank2.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/persisted-user-state-restoration/resources/blank2.html
new file mode 100644
index 0000000000..def2139667
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/persisted-user-state-restoration/resources/blank2.html
@@ -0,0 +1,8 @@
+
+
+ Blank 2 
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/persisted-user-state-restoration/resources/page-with-fragment.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/persisted-user-state-restoration/resources/page-with-fragment.html
new file mode 100644
index 0000000000..11737661d0
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/persisted-user-state-restoration/resources/page-with-fragment.html
@@ -0,0 +1,20 @@
+
+
+
+Page with fragment
+  
+
\ No newline at end of file
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/persisted-user-state-restoration/resources/post_name_on_load.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/persisted-user-state-restoration/resources/post_name_on_load.html
new file mode 100644
index 0000000000..1e9b10d1ee
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/persisted-user-state-restoration/resources/post_name_on_load.html
@@ -0,0 +1,7 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/persisted-user-state-restoration/resume-timer-on-history-back.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/persisted-user-state-restoration/resume-timer-on-history-back.html
new file mode 100644
index 0000000000..77602b2d42
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/persisted-user-state-restoration/resume-timer-on-history-back.html
@@ -0,0 +1,146 @@
+
+Verify history.back() on a persisted page resumes timers
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/persisted-user-state-restoration/scroll-restoration-basic.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/persisted-user-state-restoration/scroll-restoration-basic.html
new file mode 100644
index 0000000000..e47cd9c383
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/persisted-user-state-restoration/scroll-restoration-basic.html
@@ -0,0 +1,34 @@
+
+Verify existence and basic read/write function of history.scrollRestoration
+
+
+
+
+
+
\ No newline at end of file
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/persisted-user-state-restoration/scroll-restoration-fragment-scrolling-cross-origin.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/persisted-user-state-restoration/scroll-restoration-fragment-scrolling-cross-origin.html
new file mode 100644
index 0000000000..fec801e94b
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/persisted-user-state-restoration/scroll-restoration-fragment-scrolling-cross-origin.html
@@ -0,0 +1,71 @@
+
+
+Precedence of scroll restoration mode over fragment scrolling in cross-origin history traversal
+
+
+
+
+

+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/persisted-user-state-restoration/scroll-restoration-fragment-scrolling-samedoc.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/persisted-user-state-restoration/scroll-restoration-fragment-scrolling-samedoc.html
new file mode 100644
index 0000000000..073e0f6e06
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/persisted-user-state-restoration/scroll-restoration-fragment-scrolling-samedoc.html
@@ -0,0 +1,55 @@
+
+
+
+
+
+  
+
+
+
+
+
\ No newline at end of file
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/persisted-user-state-restoration/scroll-restoration-navigation-cross-origin.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/persisted-user-state-restoration/scroll-restoration-navigation-cross-origin.html
new file mode 100644
index 0000000000..87a337b2da
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/persisted-user-state-restoration/scroll-restoration-navigation-cross-origin.html
@@ -0,0 +1,71 @@
+
+
+Correct behaviour of scroll restoration mode is cross origin history traversal
+
+
+
+
+  
+
+
+
+
+
\ No newline at end of file
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/persisted-user-state-restoration/scroll-restoration-navigation-samedoc.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/persisted-user-state-restoration/scroll-restoration-navigation-samedoc.html
new file mode 100644
index 0000000000..46d40eedc6
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/persisted-user-state-restoration/scroll-restoration-navigation-samedoc.html
@@ -0,0 +1,81 @@
+
+Correct behaviour of scroll restoration mode in same document history traversals
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/popstate_event.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/popstate_event.html
new file mode 100644
index 0000000000..05b1dbf4b7
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/popstate_event.html
@@ -0,0 +1,48 @@
+
+Queue a task to fire popstate event
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/resources/a.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/resources/a.html
new file mode 100644
index 0000000000..55b73e1153
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/resources/a.html
@@ -0,0 +1 @@
+Welcome to A.
\ No newline at end of file
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/resources/api-availability-1.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/resources/api-availability-1.html
new file mode 100644
index 0000000000..2c31168750
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/resources/api-availability-1.html
@@ -0,0 +1,31 @@
+
+API availability following history traversal - 1
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/resources/api-availability-2.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/resources/api-availability-2.html
new file mode 100644
index 0000000000..420e5092bc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/resources/api-availability-2.html
@@ -0,0 +1,3 @@
+
+API availability following history traversal - 2
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/resources/b.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/resources/b.html
new file mode 100644
index 0000000000..8f2fc900dd
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/resources/b.html
@@ -0,0 +1 @@
+Welcome to B.
\ No newline at end of file
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/resources/c.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/resources/c.html
new file mode 100644
index 0000000000..db494e878e
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/resources/c.html
@@ -0,0 +1 @@
+Welcome to C.
\ No newline at end of file
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/resources/unset_context_name-1.sub.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/resources/unset_context_name-1.sub.html
new file mode 100644
index 0000000000..97918a1f99
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/resources/unset_context_name-1.sub.html
@@ -0,0 +1,45 @@
+
+
+window.name test helper
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/resources/unset_context_name_stash.py b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/resources/unset_context_name_stash.py
new file mode 100644
index 0000000000..411a4587bc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/resources/unset_context_name_stash.py
@@ -0,0 +1,13 @@
+def main(request, response):
+    key = request.GET.first(b"id")
+    if request.method == "POST":
+        value = request.GET.first(b"value")
+        request.server.stash.take(key)
+        request.server.stash.put(key, value)
+        return b"OK"
+    else:
+        value = request.server.stash.take(key)
+        if value is not None:
+            return value
+        else:
+            return b"NONE"
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/same-url.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/same-url.html
new file mode 100644
index 0000000000..bcca5ed90c
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/same-url.html
@@ -0,0 +1,50 @@
+Test same-URL navigation and its effects on history
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/scroll-restoration-order.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/scroll-restoration-order.html
new file mode 100644
index 0000000000..8fe7d9f977
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/scroll-restoration-order.html
@@ -0,0 +1,74 @@
+
+
+History restoration order test
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/srcdoc/consecutive-srcdoc.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/srcdoc/consecutive-srcdoc.html
new file mode 100644
index 0000000000..9aab36b986
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/srcdoc/consecutive-srcdoc.html
@@ -0,0 +1,85 @@
+
+
+changing srcdoc to a different srcdoc
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/srcdoc/srcdoc-history-entries.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/srcdoc/srcdoc-history-entries.html
new file mode 100644
index 0000000000..09f4094c5f
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/srcdoc/srcdoc-history-entries.html
@@ -0,0 +1,95 @@
+
+
+srcdoc history entries
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/support/window-name-after-cross-origin-main-frame-navigation-popup.sub.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/support/window-name-after-cross-origin-main-frame-navigation-popup.sub.html
new file mode 100644
index 0000000000..e13d191658
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/support/window-name-after-cross-origin-main-frame-navigation-popup.sub.html
@@ -0,0 +1,10 @@
+
+
+
+
+
+    
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/support/window-name-after-same-origin-main-frame-navigation-1.sub.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/support/window-name-after-same-origin-main-frame-navigation-1.sub.html
new file mode 100644
index 0000000000..4b7824b488
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/support/window-name-after-same-origin-main-frame-navigation-1.sub.html
@@ -0,0 +1,4 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/support/window-name-navigation.sub.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/support/window-name-navigation.sub.html
new file mode 100644
index 0000000000..285469a148
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/support/window-name-navigation.sub.html
@@ -0,0 +1,11 @@
+
+
+    
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/support/window-name-test.sub.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/support/window-name-test.sub.html
new file mode 100644
index 0000000000..460db2e979
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/support/window-name-test.sub.html
@@ -0,0 +1,23 @@
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/unset_context_name.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/unset_context_name.html
new file mode 100644
index 0000000000..285f6d7428
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/unset_context_name.html
@@ -0,0 +1,32 @@
+
+window.name is reset after navigating to a different origin
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/window-name-after-cross-origin-aux-frame-navigation.sub.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/window-name-after-cross-origin-aux-frame-navigation.sub.html
new file mode 100644
index 0000000000..6bc64c6373
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/window-name-after-cross-origin-aux-frame-navigation.sub.html
@@ -0,0 +1,17 @@
+
+
+
+    
+    
+    
+
+
+    
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/window-name-after-cross-origin-main-frame-navigation.sub.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/window-name-after-cross-origin-main-frame-navigation.sub.html
new file mode 100644
index 0000000000..fb0bb1883f
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/window-name-after-cross-origin-main-frame-navigation.sub.html
@@ -0,0 +1,24 @@
+
+
+
+    
+    
+
+
+    
+    
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/window-name-after-cross-origin-sub-frame-navigation.sub.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/window-name-after-cross-origin-sub-frame-navigation.sub.html
new file mode 100644
index 0000000000..a309be6d80
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/window-name-after-cross-origin-sub-frame-navigation.sub.html
@@ -0,0 +1,18 @@
+
+
+
+    
+    
+    
+
+
+    
+    
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/003-1.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/003-1.html
new file mode 100644
index 0000000000..4d2229eb51
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/003-1.html
@@ -0,0 +1,7 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/003-2.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/003-2.html
new file mode 100644
index 0000000000..827a069479
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/003-2.html
@@ -0,0 +1,9 @@
+
+003-2
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/003-3.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/003-3.html
new file mode 100644
index 0000000000..8b26c896fd
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/003-3.html
@@ -0,0 +1,4 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/003.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/003.html
new file mode 100644
index 0000000000..f437150960
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/003.html
@@ -0,0 +1,22 @@
+
+Navigation from unload whilst traversing history
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/004-1.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/004-1.html
new file mode 100644
index 0000000000..02f916fd9c
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/004-1.html
@@ -0,0 +1,7 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/004-2.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/004-2.html
new file mode 100644
index 0000000000..f2ef83ee1a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/004-2.html
@@ -0,0 +1,9 @@
+
+003-2
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/004-3.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/004-3.html
new file mode 100644
index 0000000000..c98711ae98
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/004-3.html
@@ -0,0 +1,4 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/004.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/004.html
new file mode 100644
index 0000000000..dddde4918b
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/004.html
@@ -0,0 +1,22 @@
+
+Navigation from unload whilst traversing cross-origin history
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/005.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/005.html
new file mode 100644
index 0000000000..a87e6e9b3d
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/005.html
@@ -0,0 +1,16 @@
+
+Link with onclick navigation and href navigation 
+
+
+

+
+Test
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/006.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/006.html
new file mode 100644
index 0000000000..17b3123faa
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/006.html
@@ -0,0 +1,17 @@
+
+Link with onclick form submit and href navigation 
+
+
+

+
+

+Test
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/007.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/007.html
new file mode 100644
index 0000000000..dbb23ee644
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/007.html
@@ -0,0 +1,16 @@
+
+Link with onclick javascript url and href navigation 
+
+
+

+
+Test
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/008.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/008.html
new file mode 100644
index 0000000000..3201d0679d
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/008.html
@@ -0,0 +1,17 @@
+
+Link with onclick form submit to javascript url and href navigation 
+
+
+

+
+

+Test
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/009.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/009.html
new file mode 100644
index 0000000000..d963bed2bf
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/009.html
@@ -0,0 +1,22 @@
+
+Link with onclick form submit to javascript url with document.write and href navigation 
+
+
+

+
+

+Test
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/010.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/010.html
new file mode 100644
index 0000000000..606ad82f48
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/010.html
@@ -0,0 +1,17 @@
+
+Link with onclick form submit to javascript url with delayed document.write and href navigation 
+
+
+

+
+

+Test
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/011.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/011.html
new file mode 100644
index 0000000000..4d54267968
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/011.html
@@ -0,0 +1,21 @@
+
+Link with onclick navigation to javascript url with document.write and href navigation 
+
+
+

+
+Test
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/012.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/012.html
new file mode 100644
index 0000000000..3795975d70
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/012.html
@@ -0,0 +1,20 @@
+
+Link with onclick navigation to javascript url with delayed document.write and href navigation 
+
+
+

+
+
+Test
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/013.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/013.html
new file mode 100644
index 0000000000..36a4521843
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/013.html
@@ -0,0 +1,20 @@
+
+Link with onclick navigation to javascript url with delayed document.write and href navigation 
+
+
+

+
+Test
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/014.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/014.html
new file mode 100644
index 0000000000..b27ca992bd
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/014.html
@@ -0,0 +1,21 @@
+
+ Link with javascript onclick form submission script order 
+
+
+

+
+

+Test
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/015.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/015.html
new file mode 100644
index 0000000000..696aaec2c8
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/015.html
@@ -0,0 +1,20 @@
+
+ Link with javascript onclick and href script order 
+
+
+

+
+Test
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/abort-document-load-1.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/abort-document-load-1.html
new file mode 100644
index 0000000000..50a9a50fa0
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/abort-document-load-1.html
@@ -0,0 +1,32 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/abort-document-load-2.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/abort-document-load-2.html
new file mode 100644
index 0000000000..966b93c51a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/abort-document-load-2.html
@@ -0,0 +1,32 @@
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/abort-document-load.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/abort-document-load.html
new file mode 100644
index 0000000000..4a4c3df4e7
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/abort-document-load.html
@@ -0,0 +1,30 @@
+
+Aborting a Document load
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/about-srcdoc-navigation-blocked.window.js b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/about-srcdoc-navigation-blocked.window.js
new file mode 100644
index 0000000000..58b73494e1
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/about-srcdoc-navigation-blocked.window.js
@@ -0,0 +1,52 @@
+// META: title=Navigation to about:srcdoc, not via srcdoc="", must be blocked
+// META: script=../resources/helpers.js
+
+promise_test(async t => {
+  const iframe = await addSrcdocIframe();
+
+  iframe.contentWindow.location = "/common/blank.html";
+  await waitForIframeLoad(iframe);
+
+  iframe.contentWindow.location = "about:srcdoc";
+
+  // Fetching "about:srcdoc" should result in a network error, and navigating
+  // to a network error should produce an opaque-origin page. In particular,
+  // since the error page should end up being cross-origin to the parent
+  // frame, `contentDocument` should return `null`.
+  //
+  // If instead this results in a message because we re-loaded a srcdoc document
+  // from the contents of the srcdoc="" attribute, immediately fail.
+  await Promise.race([
+    t.step_wait(() => iframe.contentDocument === null),
+    failOnMessage(iframe.contentWindow)
+  ]);
+}, "Navigations to about:srcdoc via window.location must be blocked");
+
+promise_test(async t => {
+  const iframe = await addSrcdocIframe();
+
+  iframe.contentWindow.location = "about:srcdoc?query";
+
+  // See the documentation in the above test.
+  await Promise.race([
+    t.step_wait(() => iframe.contentDocument === null),
+    failOnMessage(iframe.contentWindow)
+  ]);
+}, "Navigations to about:srcdoc?query via window.location within an " +
+   "about:srcdoc document must be blocked");
+
+promise_test(async t => {
+  const iframe = await addSrcdocIframe();
+  iframe.contentWindow.name = "test_frame";
+
+  iframe.contentWindow.location = "/common/blank.html";
+  await waitForIframeLoad(iframe);
+
+  window.open("about:srcdoc", "test_frame");
+
+  // See the documentation in the above test.
+  await Promise.race([
+    t.step_wait(() => iframe.contentDocument === null),
+    failOnMessage(iframe.contentWindow)
+  ]);
+}, "Navigations to about:srcdoc via window.open() must be blocked");
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/anchor-fragment-form-submit-longfragment.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/anchor-fragment-form-submit-longfragment.html
new file mode 100644
index 0000000000..8b9802f589
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/anchor-fragment-form-submit-longfragment.html
@@ -0,0 +1,29 @@
+
+
+
+
+Anchor element with onclick form submission and href to fragment
+
+
+
+
+
+
+

+Test
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/anchor-fragment-form-submit-withpath.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/anchor-fragment-form-submit-withpath.html
new file mode 100644
index 0000000000..823174181e
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/anchor-fragment-form-submit-withpath.html
@@ -0,0 +1,35 @@
+
+
+
+
+Anchor element with onclick form submission and href to fragment
+
+
+
+
+
+
+

+Test
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/anchor-fragment-form-submit.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/anchor-fragment-form-submit.html
new file mode 100644
index 0000000000..e0c0e6f82d
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/anchor-fragment-form-submit.html
@@ -0,0 +1,29 @@
+
+
+
+
+Anchor element with onclick form submission and href to fragment
+
+
+
+
+
+
+

+Test
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/anchor-jsurl-form-submit.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/anchor-jsurl-form-submit.html
new file mode 100644
index 0000000000..1bf5d3595a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/anchor-jsurl-form-submit.html
@@ -0,0 +1,29 @@
+
+
+
+
+Anchor element with onclick form submission and href to javascript: url
+
+
+
+
+
+
+

+Test
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/child-navigates-parent-cross-origin.window.js b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/child-navigates-parent-cross-origin.window.js
new file mode 100644
index 0000000000..c5bed0fd4c
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/child-navigates-parent-cross-origin.window.js
@@ -0,0 +1,90 @@
+// META: script=/common/get-host-info.sub.js
+// META: script=resources/wait-for-messages.js
+
+function testNavigationFails(params) {
+  return async (t) => {
+    // Start waiting for messages before inserting the child frame, to avoid any
+    // race conditions. Note that this would be racy if we executed tests
+    // concurrently, thankfully `promise_test` executes sequentially. See also:
+    // https://github.com/web-platform-tests/rfcs/pull/75
+    const messagesPromise = waitForMessages(1);
+
+    // Execute the test in an iframe, so that the document executing the test
+    // is not navigated away mid-test in case of failure.
+    const child = document.createElement("iframe");
+    document.body.appendChild(child);
+    t.add_cleanup(() => { document.body.removeChild(child); });
+
+    const url = new URL(
+        "resources/child-navigates-parent-cross-origin-inner.html",
+        window.location);
+
+    // Load the grandchild iframe from a different origin.
+    url.host = get_host_info().REMOTE_HOST;
+
+    for (const key in params || {}) {
+      url.searchParams.set(key, params[key]);
+    }
+
+    const grandchild = child.contentDocument.createElement("iframe");
+    grandchild.src = url;
+    child.contentDocument.body.appendChild(grandchild);
+
+    const messages = await messagesPromise;
+    assert_array_equals(messages, ["error: SecurityError"]);
+  }
+}
+
+promise_test(
+    testNavigationFails(),
+    "Child document attempts to navigate cross-origin parent via location");
+
+promise_test(
+    testNavigationFails({ "property": "hash" }),
+    "Child document attempts to navigate cross-origin parent via "+
+    "location.hash");
+
+promise_test(
+    testNavigationFails({ "property": "host" }),
+    "Child document attempts to navigate cross-origin parent via "+
+    "location.host");
+
+promise_test(
+    testNavigationFails({ "property": "hostname" }),
+    "Child document attempts to navigate cross-origin parent via "+
+    "location.hostname");
+
+promise_test(
+    testNavigationFails({ "property": "href" }),
+    "Child document attempts to navigate cross-origin parent via "+
+    "location.href");
+
+promise_test(
+    testNavigationFails({ "property": "pathname" }),
+    "Child document attempts to navigate cross-origin parent via "+
+    "location.pathname");
+
+promise_test(
+    testNavigationFails({ "property": "protocol" }),
+    "Child document attempts to navigate cross-origin parent via "+
+    "location.protocol");
+
+promise_test(
+    testNavigationFails({ "property": "reload" }),
+    "Child document attempts to navigate cross-origin parent via "+
+    "location.reload()");
+
+promise_test(
+    testNavigationFails({ "property": "replace" }),
+    "Child document attempts to navigate cross-origin parent via "+
+    "location.replace()");
+
+promise_test(
+    testNavigationFails({ "property": "search" }),
+    "Child document attempts to navigate cross-origin parent via "+
+    "location.search");
+
+promise_test(
+    testNavigationFails({ "property": "xxxNonExistent" }),
+    "Child document attempts to navigate cross-origin parent via non-standard "+
+    "location property");
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/child-navigates-parent-same-origin.window.js b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/child-navigates-parent-same-origin.window.js
new file mode 100644
index 0000000000..a40c412029
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/child-navigates-parent-same-origin.window.js
@@ -0,0 +1,24 @@
+// META: script=resources/wait-for-messages.js
+
+function testNavigation(url) {
+  return async (t) => {
+    // Start waiting for messages before inserting the child frame, to avoid any
+    // race conditions.
+    const messagesPromise = waitForMessages(3);
+
+    const iframe = document.createElement("iframe");
+    iframe.src = url;
+    document.body.appendChild(iframe);
+
+    const messages = await messagesPromise;
+    assert_array_equals(messages, ["initial", "inner", "destination"]);
+  }
+}
+
+promise_test(
+    testNavigation("resources/child-navigates-parent-location-initial.html"),
+    "Child document navigates same-origin parent via document.location");
+
+promise_test(
+    testNavigation("resources/child-navigates-parent-submit-initial.html"),
+    "Child document navigates same-origin parent via form submission");
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/cross-origin-top-navigation-with-user-activation-in-parent.window.js b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/cross-origin-top-navigation-with-user-activation-in-parent.window.js
new file mode 100644
index 0000000000..42b4b208ee
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/cross-origin-top-navigation-with-user-activation-in-parent.window.js
@@ -0,0 +1,8 @@
+async_test(t => {
+  addEventListener('message', t.step_func_done(e => {
+    assert_equals(e.data, 'Denied');
+  }));
+  const w = open("resources/page-with-top-navigating-iframe.html?parent_user_gesture=true");
+  t.add_cleanup(() => {w.close()});
+
+}, "Cross-origin top navigation is blocked without user activation, even if the parent has user activation");
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/cross-origin-top-navigation-without-user-activation.window.js b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/cross-origin-top-navigation-without-user-activation.window.js
new file mode 100644
index 0000000000..57f0bce247
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/cross-origin-top-navigation-without-user-activation.window.js
@@ -0,0 +1,8 @@
+async_test(t => {
+  addEventListener('message', t.step_func_done(e => {
+    assert_equals(e.data, 'Denied');
+  }));
+  const w = open("resources/page-with-top-navigating-iframe.html");
+  t.add_cleanup(() => {w.close()});
+
+}, "Cross-origin top navigation is blocked without user activation");
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/empty-iframe-load-event.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/empty-iframe-load-event.html
new file mode 100644
index 0000000000..b9108f9937
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/empty-iframe-load-event.html
@@ -0,0 +1,39 @@
+
+load event for empty iframe in relation to the event loop
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/empty_fragment.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/empty_fragment.html
new file mode 100644
index 0000000000..18a6f84c9f
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/empty_fragment.html
@@ -0,0 +1,20 @@
+
+
+Navigating to the same URL with an empty fragment aborts the navigation
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/empty_fragment_iframe.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/empty_fragment_iframe.html
new file mode 100644
index 0000000000..26b28a0d7d
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/empty_fragment_iframe.html
@@ -0,0 +1,11 @@
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/failure-check-sequence.https.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/failure-check-sequence.https.html
new file mode 100644
index 0000000000..5d7aa2b9cb
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/failure-check-sequence.https.html
@@ -0,0 +1,76 @@
+
+
+
+
+Sequence of the checks performed against a navigation response
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/iframe-nosrc.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/iframe-nosrc.html
new file mode 100644
index 0000000000..b89d3bb54b
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/iframe-nosrc.html
@@ -0,0 +1,178 @@
+
+
+Navigations on iframe without src attribute
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/iframe-src-204-fragment.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/iframe-src-204-fragment.html
new file mode 100644
index 0000000000..2a472f6a6d
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/iframe-src-204-fragment.html
@@ -0,0 +1,144 @@
+
+
+Fragment navigations on iframe with src set to URL that doesn't load a document (HTTP 204)
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/iframe-src-204-pushState-replaceState.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/iframe-src-204-pushState-replaceState.html
new file mode 100644
index 0000000000..8a97fd36a4
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/iframe-src-204-pushState-replaceState.html
@@ -0,0 +1,66 @@
+
+
+pushState/replaceState on iframe with src set to URL that doesn't load a document (HTTP 204)
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/iframe-src-204.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/iframe-src-204.html
new file mode 100644
index 0000000000..f7bade68fb
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/iframe-src-204.html
@@ -0,0 +1,178 @@
+
+
+Navigations on iframe with src set to URL that doesn't load a new document
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/iframe-src-aboutblank-navigate-immediately.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/iframe-src-aboutblank-navigate-immediately.html
new file mode 100644
index 0000000000..a75257d91c
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/iframe-src-aboutblank-navigate-immediately.html
@@ -0,0 +1,124 @@
+
+
+Navigations immediately after appending iframe with src='about:blank'
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/iframe-src-aboutblank-wait-for-load.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/iframe-src-aboutblank-wait-for-load.html
new file mode 100644
index 0000000000..b7066ce521
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/iframe-src-aboutblank-wait-for-load.html
@@ -0,0 +1,134 @@
+
+
+Navigations after iframe with src='about:blank' finished loading
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/initial-content-replacement.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/initial-content-replacement.html
new file mode 100644
index 0000000000..44f890df6c
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/initial-content-replacement.html
@@ -0,0 +1,86 @@
+
+
+
+  Content synchronously added to iframe/opened window's document after creation
+  won't get replaced asynchronously when staying on the initial empty document
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-event-iframe-element.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-event-iframe-element.html
new file mode 100644
index 0000000000..0d19770cc1
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-event-iframe-element.html
@@ -0,0 +1,64 @@
+
+
+"load" event fires on the iframe element when loading the initial empty document
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-iframe-contentWindow.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-iframe-contentWindow.html
new file mode 100644
index 0000000000..4aea4aac81
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-iframe-contentWindow.html
@@ -0,0 +1,44 @@
+
+
+"load" & "pageshow" events do not fire on contentWindow of iframe that stays on the initial empty document
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-window-open.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-window-open.html
new file mode 100644
index 0000000000..9703502f7f
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-window-open.html
@@ -0,0 +1,35 @@
+
+
+"load" and "pageshow" events don't fire on window.open() that stays on the initial empty document
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/resources/code-injector.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/resources/code-injector.html
new file mode 100644
index 0000000000..631b95f9ed
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/resources/code-injector.html
@@ -0,0 +1,8 @@
+
+
+Subframe
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/resources/helpers.js b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/resources/helpers.js
new file mode 100644
index 0000000000..8d9473a949
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/resources/helpers.js
@@ -0,0 +1,121 @@
+// Returns a promise that asserts the "load" and "pageshow" events are not
+// fired on |target|.
+function assertNoLoadAndPageshowEvent(t, target) {
+  target.addEventListener("load", t.unreached_func("load should not be fired"));
+  target.addEventListener("pageshow", t.unreached_func("pageshow should not be fired"));
+  return new Promise(resolve => {
+    // Wait 50ms to ensure events fired after asynchronous navigations are
+    // also captured.
+    setTimeout(resolve, 50);
+  });
+}
+
+const url204 = "/common/blank.html?pipe=status(204)";
+const postMessageToOpenerOnLoad = `
+    window.onload = () => {
+      window.opener.postMessage("loaded", "*")
+    }
+  `;
+
+// -- Start of helpers for iframe initial empty document tests.
+
+// Creates an iframe with an unset src and appends it to the document.
+window.insertIframe = (t) => {
+  const iframe = document.createElement("iframe");
+  t.add_cleanup(() => iframe.remove());
+  document.body.append(iframe);
+  return iframe;
+};
+
+// Creates an iframe with src set to a URL that doesn't commit a new document
+// (results in a HTTP 204 response) and appends it to the document.
+window.insertIframeWith204Src = (t) => {
+  const iframe = document.createElement("iframe");
+  iframe.src = url204;
+  t.add_cleanup(() => iframe.remove());
+  document.body.append(iframe);
+  return iframe;
+};
+
+// Creates an iframe with src="about:blank" and appends it to the document.
+window.insertIframeWithAboutBlankSrc = (t) => {
+  const iframe = document.createElement("iframe");
+  t.add_cleanup(() => iframe.remove());
+  iframe.src = "about:blank";
+  document.body.append(iframe);
+  return iframe;
+};
+
+// Creates an iframe with src="about:blank", appends it to the document, and
+// waits for the non-initial about:blank document finished loading.
+window.insertIframeWithAboutBlankSrcWaitForLoad = async (t) => {
+  const iframe = insertIframeWithAboutBlankSrc(t);
+  const aboutBlankLoad = new Promise(resolve => {
+    // In some browsers, the non-initial about:blank navigation commits
+    // asynchronously, while in other browsers, it would commit synchronously.
+    // This means we can't wait for the "load" event as it might have already
+    // ran. Instead, just wait for 100ms before resolving, as the non-initial
+    // about:blank navigation will most likely take less than 100 ms to commit.
+    t.step_timeout(resolve, 100);
+  });
+  await aboutBlankLoad;
+  return iframe;
+};
+
+// Waits for the "load" event for |urlRelativeToThisDocument| to run on
+// |iframe|.
+window.waitForLoad = (t, iframe, urlRelativeToThisDocument) => {
+  return new Promise(resolve => {
+    iframe.addEventListener("load", t.step_func(() => {
+      assert_equals(iframe.contentWindow.location.href, (new URL(urlRelativeToThisDocument, location.href)).href);
+
+      // Wait a bit longer to ensure all history stuff has settled, e.g. the document is "completely loaded"
+      // (which happens from a queued task).
+      setTimeout(resolve, 0);
+    }), { once: true });
+  });
+};
+
+// -- End of helpers for iframe initial empty document tests.
+
+// -- Start of helpers for opened windows' initial empty document tests.
+
+// window.open() to a URL that doesn't load a new document (results in a HTTP
+// 204 response). This should create a new window that stays on the initial
+// empty document.
+window.windowOpen204 = (t) => {
+  const openedWindow = window.open(url204);
+  t.add_cleanup(() => openedWindow.close());
+  return openedWindow;
+};
+
+// window.open() (no URL set). This should create a new window that stays on
+// the initial empty document as it won't trigger a non-initial about:blank
+// navigation.
+window.windowOpenNoURL = (t) => {
+  const openedWindow = window.open();
+  t.add_cleanup(() => openedWindow.close());
+  return openedWindow;
+};
+
+// window.open("about:blank"). This should create a new window that stays on
+// the initial empty document as it won't trigger a non-initial about:blank
+// navigation.
+window.windowOpenAboutBlank = (t) => {
+  const openedWindow = window.open("about:blank");
+  t.add_cleanup(() => openedWindow.close());
+  return openedWindow;
+};
+
+// Waits for a postMessage with data set to |message| is received on the current
+// window.
+window.waitForMessage = (t, message) => {
+  return new Promise(resolve => {
+    window.addEventListener("message", t.step_func((event) => {
+      if (event.data == message)
+        resolve();
+    }));
+  });
+};
+
+// -- End of helpers for opened windows' initial empty document tests.
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/window-open-204-fragment.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/window-open-204-fragment.html
new file mode 100644
index 0000000000..bb47cd3820
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/window-open-204-fragment.html
@@ -0,0 +1,63 @@
+
+
+Fragment navigation on initial empty document created through window.open(url-with-204-response)
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/window-open-204-pushState-replaceState.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/window-open-204-pushState-replaceState.html
new file mode 100644
index 0000000000..b5382b189f
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/window-open-204-pushState-replaceState.html
@@ -0,0 +1,61 @@
+
+
+Fragment navigation on initial empty document created through window.open(url-with-204-response)
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/window-open-204.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/window-open-204.html
new file mode 100644
index 0000000000..6461b3c8fc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/window-open-204.html
@@ -0,0 +1,81 @@
+
+
+Navigations on window.open() with URL that doesn't load a new document
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/window-open-aboutblank.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/window-open-aboutblank.html
new file mode 100644
index 0000000000..f3033d6a21
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/window-open-aboutblank.html
@@ -0,0 +1,81 @@
+
+
+Navigations on window.open(about:blank) after waiting for it to load
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/window-open-history-length.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/window-open-history-length.html
new file mode 100644
index 0000000000..ab89bc4098
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/window-open-history-length.html
@@ -0,0 +1,31 @@
+
+
+history.length value on window.open()-ed window
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/window-open-nourl.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/window-open-nourl.html
new file mode 100644
index 0000000000..801f77ad48
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/window-open-nourl.html
@@ -0,0 +1,78 @@
+
+
+Navigations on window.open() to URL that doesn't load a new document
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-abort/javascript-url-abort-return-value-string.tentative.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-abort/javascript-url-abort-return-value-string.tentative.html
new file mode 100644
index 0000000000..f626a79ae6
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-abort/javascript-url-abort-return-value-string.tentative.html
@@ -0,0 +1,28 @@
+
+Aborting fetch for javascript:string navigation
+
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-abort/javascript-url-abort-return-value-undefined.tentative.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-abort/javascript-url-abort-return-value-undefined.tentative.html
new file mode 100644
index 0000000000..80a0d27a7d
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-abort/javascript-url-abort-return-value-undefined.tentative.html
@@ -0,0 +1,25 @@
+
+Not aborting fetch for javascript:undefined navigation
+
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-abort/support/iframe-and-links.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-abort/support/iframe-and-links.html
new file mode 100644
index 0000000000..545b0988ba
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-abort/support/iframe-and-links.html
@@ -0,0 +1,18 @@
+
+
+
+
+
+
+slow link
+javascript:string link
+javascript:undefined link
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-abort/support/set-child-loaded.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-abort/support/set-child-loaded.html
new file mode 100644
index 0000000000..a4b34ad6e9
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-abort/support/set-child-loaded.html
@@ -0,0 +1,5 @@
+
+set-child-loaded.html
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-global-scope.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-global-scope.html
new file mode 100644
index 0000000000..d3dd38ebed
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-global-scope.html
@@ -0,0 +1,16 @@
+
+
+
+
+
+link
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-load-as-html.xhtml b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-load-as-html.xhtml
new file mode 100644
index 0000000000..b23bef5917
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-load-as-html.xhtml
@@ -0,0 +1,37 @@
+
+
+
+  
+  
+  
+  
+  javascript: URL navigation to a string must create a HTML document using the correct properties
+
+
+  
+  
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-no-beforeunload.window.js b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-no-beforeunload.window.js
new file mode 100644
index 0000000000..47e8f11797
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-no-beforeunload.window.js
@@ -0,0 +1,80 @@
+// META: script=../resources/helpers.js
+
+for (const stringCompletion of [false, true]) {
+  const testNameSuffix = stringCompletion ? ": string completion" : ": undefined completion";
+
+  testNoBeforeunload(
+    { testRunnerWindow: "top", stringCompletion },
+    async (t, urlToSet) => {
+      const iframe = await addIframe();
+      iframe.contentWindow.location.href = urlToSet;
+
+      return iframe.contentWindow;
+    },
+    `Navigating an iframe via location.href to a javascript: URL must not fire beforeunload${testNameSuffix}`
+  );
+
+  testNoBeforeunload(
+    { testRunnerWindow: "top", stringCompletion },
+    async (t, urlToSet) => {
+      const iframe = await addIframe();
+      iframe.src = urlToSet;
+
+      return iframe.contentWindow;
+    },
+    `Navigating an iframe via src="" to a javascript: URL after insertion must not fire beforeunload${testNameSuffix}`
+  );
+
+  testNoBeforeunload(
+    { testRunnerWindow: "opener", stringCompletion },
+    async (t, urlToSet) => {
+      const w = await openWindow("/common/blank.html", t);
+      w.location.href = urlToSet;
+
+      return w;
+    },
+    `Navigating an opened window via location.href to a javascript: URL must not fire beforeunload${testNameSuffix}`
+  );
+
+
+  testNoBeforeunload(
+    { testRunnerWindow: "opener", stringCompletion },
+    async (t, urlToSet) => {
+      const w = await openWindow("../resources/has-iframe.html", t);
+      w.frames[0].onbeforeunload = t.unreached_func("beforeunload must not fire on the iframe");
+      w.location.href = urlToSet;
+
+      return w;
+    },
+    `Navigating an opened window with an iframe via location.href to a javascript: URL must not fire beforeunload on the iframe${testNameSuffix}`
+  );
+}
+
+function testNoBeforeunload({ testRunnerWindow, stringCompletion }, setupAndNavigateFunc, description) {
+  promise_test(async t => {
+    t.add_cleanup(() => {
+      delete window.resolveTestPromise;
+    });
+
+    const ranPromise = new Promise(resolve => {
+      window.resolveTestPromise = resolve;
+    });
+
+    const urlToSet = makeURL({ testRunnerWindow, stringCompletion });
+    const w = await setupAndNavigateFunc(t, urlToSet);
+    w.onbeforeunload = t.unreached_func("beforeunload must not fire");
+
+    await ranPromise;
+    if (stringCompletion) {
+      await waitForMessage(w);
+    }
+  }, description);
+}
+
+function makeURL({ testRunnerWindow, stringCompletion }) {
+  const completion = stringCompletion ?
+    `"a string";` :
+    `undefined;`;
+
+  return `javascript:window.${testRunnerWindow}.resolveTestPromise();${completion};`;
+}
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-query-fragment-components.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-query-fragment-components.html
new file mode 100644
index 0000000000..eced9646e5
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-query-fragment-components.html
@@ -0,0 +1,28 @@
+
+ javascript url with query and fragment components 
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-referrer.window.js b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-referrer.window.js
new file mode 100644
index 0000000000..1f11429c9e
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-referrer.window.js
@@ -0,0 +1,38 @@
+// META: script=../resources/helpers.js
+// META: title=javascript: URL navigation to a string must create a document whose referrer is the navigation initiator
+
+const originalURL = location.href;
+
+const testCases = [
+  ["unsafe-url", location.href],
+  ["origin", self.origin + "/"],
+  ["no-referrer", ""]
+];
+
+for (const [referrerPolicyForStartingWindowCreation, expectedReferrer] of testCases) {
+  promise_test(async (t) => {
+    const meta = document.createElement("meta");
+    meta.name = "referrer";
+    meta.content = referrerPolicyForStartingWindowCreation;
+    t.add_cleanup(() => meta.remove());
+    document.head.append(meta);
+
+    const w = await openWindow("/common/blank.html", t);
+    const originalReferrer = w.document.referrer;
+    assert_equals(originalReferrer, expectedReferrer,
+      "Sanity check: opened window's referrer is set correctly");
+
+    // Mess with the current document's URL so that the initiator URL is different. Then, if that
+    // shows up as the javascript: URL document's referrer, we know the navigation initiator's URL is
+    // being used as the referrer, which is incorrect.
+    history.replaceState(undefined, "", "/incorrect-referrer.html");
+    t.add_cleanup(() => history.replaceState(undefined, "", originalURL));
+
+    w.location.href = `javascript:'a string'`;
+
+    const referrer = await waitForMessage(w);
+
+    assert_equals(referrer, originalReferrer,
+      "javascript: URL-created document's referrer equals the previous document's referrer");
+  }, `${referrerPolicyForStartingWindowCreation} referrer policy used to create the starting page`);
+}
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-return-value-handling-dynamic.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-return-value-handling-dynamic.html
new file mode 100644
index 0000000000..3c08d29674
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-return-value-handling-dynamic.html
@@ -0,0 +1,58 @@
+
+ 
+Test javascript URL string return values in direct and indirect (target) frame contexts.
+
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-return-value-handling.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-return-value-handling.html
new file mode 100644
index 0000000000..621a8cbaec
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-return-value-handling.html
@@ -0,0 +1,36 @@
+
+
+Test that javascript: evaluation only performs a navigation to the
+  result when the result is a string value.
+
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-security-check-failure.sub.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-security-check-failure.sub.html
new file mode 100644
index 0000000000..a153ad3e48
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-security-check-failure.sub.html
@@ -0,0 +1,56 @@
+
+
+javascript: URL security check
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-security-check-multi-globals.sub.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-security-check-multi-globals.sub.html
new file mode 100644
index 0000000000..4b9d3b7afa
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-security-check-multi-globals.sub.html
@@ -0,0 +1,66 @@
+
+
+Multi-globals: which one is the initiator for the javascript: URL security check?
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-security-check-same-origin-domain.sub.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-security-check-same-origin-domain.sub.html
new file mode 100644
index 0000000000..a14a13cfd6
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-security-check-same-origin-domain.sub.html
@@ -0,0 +1,26 @@
+
+
+javascript: URL security check for same-origin-domain but not same-origin
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-task-queuing.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-task-queuing.html
new file mode 100644
index 0000000000..1bb05bfb19
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-task-queuing.html
@@ -0,0 +1,58 @@
+
+
+javascript: URL task queuing
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/multiple-globals/context-for-location-assign.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/multiple-globals/context-for-location-assign.html
new file mode 100644
index 0000000000..cb2984d409
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/multiple-globals/context-for-location-assign.html
@@ -0,0 +1,27 @@
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/multiple-globals/context-for-location-href.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/multiple-globals/context-for-location-href.html
new file mode 100644
index 0000000000..02ff214ed5
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/multiple-globals/context-for-location-href.html
@@ -0,0 +1,27 @@
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/multiple-globals/context-for-location.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/multiple-globals/context-for-location.html
new file mode 100644
index 0000000000..fae17dd2ac
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/multiple-globals/context-for-location.html
@@ -0,0 +1,27 @@
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/multiple-globals/context-for-window-open.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/multiple-globals/context-for-window-open.html
new file mode 100644
index 0000000000..0a391ef28e
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/multiple-globals/context-for-window-open.html
@@ -0,0 +1,28 @@
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/multiple-globals/entry/entry.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/multiple-globals/entry/entry.html
new file mode 100644
index 0000000000..82fecfdd38
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/multiple-globals/entry/entry.html
@@ -0,0 +1,4 @@
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/multiple-globals/entry/target.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/multiple-globals/entry/target.html
new file mode 100644
index 0000000000..5ceaeaf07e
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/multiple-globals/entry/target.html
@@ -0,0 +1,2 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/multiple-globals/incumbent/empty.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/multiple-globals/incumbent/empty.html
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/multiple-globals/incumbent/target.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/multiple-globals/incumbent/target.html
new file mode 100644
index 0000000000..5ceaeaf07e
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/multiple-globals/incumbent/target.html
@@ -0,0 +1,2 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/multiple-globals/relevant/empty.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/multiple-globals/relevant/empty.html
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/multiple-globals/relevant/target.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/multiple-globals/relevant/target.html
new file mode 100644
index 0000000000..5ceaeaf07e
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/multiple-globals/relevant/target.html
@@ -0,0 +1,2 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/multiple-globals/resources/context-helper.js b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/multiple-globals/resources/context-helper.js
new file mode 100644
index 0000000000..dda338b4cc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/multiple-globals/resources/context-helper.js
@@ -0,0 +1,34 @@
+// Usage: in the top-level Window, include:
+//
+// 
+// 
+// 
+//
+// Then `scriptToRun` is evaluated, with:
+// - The entry Realm is that of entry/entry.html
+// - The incumbent Realm is that of incumbent/empty.html
+// - The relevant Realm of `relevantWindow`, `relevantWindow.location` etc. is
+//   that of relevant/empty.html
+
+window.scriptToRun = '';
+
+const entryUrl = new URL('entry/entry.html', location).href;
+const incumbentUrl = new URL('incumbent/empty.html', location).href;
+const relevantUrl = new URL('relevant/empty.html', location).href;
+
+function go() {
+    const entry = document.querySelector('#entry');
+    const incumbent = entry.contentDocument.querySelector('#incumbent');
+    const incumbentScript = incumbent.contentDocument.createElement('script');
+    incumbentScript.textContent = `
+    function go() {
+      const relevantWindow =
+          parent.document.querySelector('#relevant').contentWindow;
+      ${window.scriptToRun}
+    }
+    `;
+    incumbent.contentDocument.head.appendChild(incumbentScript);
+    incumbent.contentWindow.go();
+}
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/multiple-globals/resources/target.js b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/multiple-globals/resources/target.js
new file mode 100644
index 0000000000..e3a507b0d8
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/multiple-globals/resources/target.js
@@ -0,0 +1,11 @@
+window.onload = function() {
+    let testWindow;
+    if (opener) {
+      testWindow = opener.top;
+    } else {
+      testWindow = top;
+    }
+    testWindow.postMessage(
+        {location: location.href, referrer: document.referrer},
+        "*");
+}
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/navigate-cross-origin-iframe-to-same-url-with-fragment-fire-load-event.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/navigate-cross-origin-iframe-to-same-url-with-fragment-fire-load-event.html
new file mode 100644
index 0000000000..f74bbfd7d3
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/navigate-cross-origin-iframe-to-same-url-with-fragment-fire-load-event.html
@@ -0,0 +1,31 @@
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/navigate-cross-origin-iframe-to-same-url-with-fragment.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/navigate-cross-origin-iframe-to-same-url-with-fragment.html
new file mode 100644
index 0000000000..ed228ad59b
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/navigate-cross-origin-iframe-to-same-url-with-fragment.html
@@ -0,0 +1,27 @@
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/navigate-cross-origin-iframe-to-same-url.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/navigate-cross-origin-iframe-to-same-url.html
new file mode 100644
index 0000000000..9996d58914
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/navigate-cross-origin-iframe-to-same-url.html
@@ -0,0 +1,22 @@
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/navigate-to-unparseable-url.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/navigate-to-unparseable-url.html
new file mode 100644
index 0000000000..d20a440d03
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/navigate-to-unparseable-url.html
@@ -0,0 +1,58 @@
+
+
+location.href unparseable URL throws a SyntaxError DOMException
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-cross-origin.sub.window.js b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-cross-origin.sub.window.js
new file mode 100644
index 0000000000..f23e2c440b
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-cross-origin.sub.window.js
@@ -0,0 +1,15 @@
+// META: title=Cross-origin navigation started from unload handler must be ignored
+// META: script=../resources/helpers.js
+
+promise_test(async () => {
+  const iframe = await addIframe();
+
+  iframe.contentWindow.addEventListener("unload", () => {
+    iframe.contentWindow.location.href = "//{{hosts[][www]}}/common/blank.html?fail";
+  });
+
+  iframe.src = "/common/blank.html?pass";
+
+  await waitForIframeLoad(iframe);
+  assert_equals(iframe.contentWindow.location.search, "?pass");
+});
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-data-url.window.js b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-data-url.window.js
new file mode 100644
index 0000000000..cf39b01107
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-data-url.window.js
@@ -0,0 +1,15 @@
+// META: title=data: URL navigation started from unload handler must be ignored
+// META: script=../resources/helpers.js
+
+promise_test(async () => {
+  const iframe = await addIframe();
+
+  iframe.contentWindow.addEventListener("unload", () => {
+    iframe.contentWindow.location.href =
+      `data:text/html,unload`;
+  });
+
+  iframe.src =
+    `data:text/html,load`;
+  assert_equals(await waitForMessage(iframe.contentWindow), "pass");
+});
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-form-submit-1.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-form-submit-1.html
new file mode 100644
index 0000000000..e06def9b20
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-form-submit-1.html
@@ -0,0 +1,23 @@
+
+
+
navigation-unload-form-submit-1.html

+
+
+
+

+  
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-form-submit-2.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-form-submit-2.html
new file mode 100644
index 0000000000..43cd3c1b33
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-form-submit-2.html
@@ -0,0 +1,7 @@
+
+
+
navigation-unload-form-submit-2.html

+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-form-submit.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-form-submit.html
new file mode 100644
index 0000000000..029170d46a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-form-submit.html
@@ -0,0 +1,24 @@
+
+
+
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-javascript-url.window.js b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-javascript-url.window.js
new file mode 100644
index 0000000000..abbcb888a0
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-javascript-url.window.js
@@ -0,0 +1,15 @@
+// META: title=javascript: URL navigation started from unload handler must be ignored
+// META: script=../resources/helpers.js
+
+promise_test(async () => {
+  const iframe = await addIframe();
+
+  iframe.contentWindow.addEventListener("unload", () => {
+    iframe.contentWindow.location.href =
+      `javascript:"unload"`;
+  });
+
+  iframe.src =
+    `javascript:"load"`;
+  assert_equals(await waitForMessage(iframe.contentWindow), "pass");
+});
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin-fragment-1.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin-fragment-1.html
new file mode 100644
index 0000000000..3b5d725fee
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin-fragment-1.html
@@ -0,0 +1,9 @@
+
+
+
navigation-unload-same-origin-fragment-1.html

+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin-fragment-2.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin-fragment-2.html
new file mode 100644
index 0000000000..2fb7f50b43
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin-fragment-2.html
@@ -0,0 +1,9 @@
+
+
+
navigation-unload-same-origin-fragment-2.html

+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin-fragment.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin-fragment.html
new file mode 100644
index 0000000000..c4dceb9e04
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin-fragment.html
@@ -0,0 +1,29 @@
+
+
+
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin.window.js b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin.window.js
new file mode 100644
index 0000000000..826af4b75b
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin.window.js
@@ -0,0 +1,15 @@
+// META: title=Same-origin navigation started from unload handler must be ignored
+// META: script=../resources/helpers.js
+
+promise_test(async () => {
+  const iframe = await addIframe();
+
+  iframe.contentWindow.addEventListener("unload", () => {
+    iframe.contentWindow.location.href = "/common/blank.html?fail";
+  });
+
+  iframe.src = "/common/blank.html?pass";
+
+  await waitForIframeLoad(iframe);
+  assert_equals(iframe.contentWindow.location.search, "?pass");
+});
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/plugin-document.historical.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/plugin-document.historical.html
new file mode 100644
index 0000000000..547917b795
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/plugin-document.historical.html
@@ -0,0 +1,22 @@
+
+
+Same-origin PDFs must not create accessible Document objects
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/redirect-to-about.window.js b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/redirect-to-about.window.js
new file mode 100644
index 0000000000..5480911895
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/redirect-to-about.window.js
@@ -0,0 +1,34 @@
+"use strict";
+
+["about:blank", "about:srcdoc", "about:nonstandard"].forEach(aboutURL => {
+  promise_test(async t => {
+    const iframe = document.createElement("iframe");
+    iframe.src = `resources/redirect.py?location=${aboutURL}`;
+    document.body.append(iframe);
+
+    // Unfortunately Firefox does not fire a load event for network errors yet, but there is no
+    // other way I can see to test this. (Also applicable below.)
+    await new Promise(r => iframe.onload = r);
+
+    // Must throw since error pages are opaque origin.
+    assert_throws_dom("SecurityError", () => {
+      iframe.contentWindow.document;
+    });
+  }, `An iframe with src set to a redirect to ${aboutURL}`);
+
+  promise_test(async t => {
+    const iframe = document.createElement("iframe");
+    iframe.src = "/common/blank.html";
+    document.body.append(iframe);
+
+    await new Promise(r => iframe.onload = r);
+
+    iframe.contentWindow.location.href = `resources/redirect.py?location=${aboutURL}`;
+    await new Promise(r => iframe.onload = r);
+
+    // Must throw since error pages are opaque origin.
+    assert_throws_dom("SecurityError", () => {
+      iframe.contentWindow.document;
+    });
+  }, `An iframe that is navigated to a redirect to ${aboutURL}`);
+});
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/redirect-to-data.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/redirect-to-data.html
new file mode 100644
index 0000000000..f9e8021ddf
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/redirect-to-data.html
@@ -0,0 +1,75 @@
+
+
+Redirecting to data: URLs is disallowed
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/redirect-to-unparseable-url.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/redirect-to-unparseable-url.html
new file mode 100644
index 0000000000..b025f34478
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/redirect-to-unparseable-url.html
@@ -0,0 +1,71 @@
+
+
+Session history interaction with redirects to unparseable URLs
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/refresh/README.md b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/refresh/README.md
new file mode 100644
index 0000000000..52548db656
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/refresh/README.md
@@ -0,0 +1 @@
+See `/html/semantics/document-metadata/the-meta-element/pragma-directives/attr-meta-http-equiv-refresh/parsing.html` for more detailed parsing tests (shared with ``).
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/refresh/navigate.window.js b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/refresh/navigate.window.js
new file mode 100644
index 0000000000..7d5a0fe21d
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/refresh/navigate.window.js
@@ -0,0 +1,23 @@
+async_test(t => {
+  const frame = document.createElement("iframe");
+  frame.src = "resources/refresh.py"
+  frame.onload = t.step_func(() => {
+    // Could be better by verifying that resources/refresh.py loads too
+    if(frame.contentWindow.location.href === (new URL("resources/refreshed.txt?\u0080\u00FF", self.location)).href) { // Make sure bytes got mapped to code points of the same value
+      t.done();
+    }
+  });
+  document.body.appendChild(frame)
+}, "When navigating the Refresh header needs to be followed");
+
+async_test(t => {
+  const frame = document.createElement("iframe");
+  frame.src = "resources/multiple.asis"
+  frame.onload = t.step_func(() => {
+    // Could be better by verifying that resources/refresh.py loads too
+    if(frame.contentWindow.location.href === (new URL("resources/refreshed.txt", self.location)).href) {
+      t.done();
+    }
+  });
+  document.body.appendChild(frame)
+}, "When there's both a Refresh header and  the Refresh header wins")
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/refresh/resources/multiple.asis b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/refresh/resources/multiple.asis
new file mode 100644
index 0000000000..3026d8297b
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/refresh/resources/multiple.asis
@@ -0,0 +1,6 @@
+HTTP/1.1 200 OK
+Refresh: 0,./refreshed.txt
+Content-Type:text/html
+
+I don't understand.
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/refresh/resources/refresh.py b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/refresh/resources/refresh.py
new file mode 100644
index 0000000000..ecdd24f268
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/refresh/resources/refresh.py
@@ -0,0 +1,4 @@
+def main(request, response):
+    response.headers.set(b"Content-Type", b"text/plain")
+    response.headers.set(b"Refresh", b"0;./refreshed.txt?\x80\xFF") # Test byte to Unicode conversion
+    response.content = u"Not refreshed.\n"
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/refresh/resources/refreshed.txt b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/refresh/resources/refreshed.txt
new file mode 100644
index 0000000000..5df065b456
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/refresh/resources/refreshed.txt
@@ -0,0 +1 @@
+Have another.
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/refresh/subresource.any.js b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/refresh/subresource.any.js
new file mode 100644
index 0000000000..930dd34ad5
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/refresh/subresource.any.js
@@ -0,0 +1,6 @@
+promise_test(() => {
+  return fetch("resources/refresh.py").then(response => {
+    assert_equals(response.headers.get("refresh"), "0;./refreshed.txt?\u0080\u00FF"); // Make sure bytes got mapped to code points of the same value
+    assert_equals(response.url, (new URL("resources/refresh.py", self.location)).href);
+  });
+}, "Refresh does not affect subresources.");
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/a-click-during-load.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/a-click-during-load.html
new file mode 100644
index 0000000000..e035b1f517
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/a-click-during-load.html
@@ -0,0 +1,32 @@
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/a-click-during-pageshow.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/a-click-during-pageshow.html
new file mode 100644
index 0000000000..006ce531e0
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/a-click-during-pageshow.html
@@ -0,0 +1,32 @@
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/a-click.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/a-click.html
new file mode 100644
index 0000000000..be7d1a9849
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/a-click.html
@@ -0,0 +1,30 @@
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/a-user-click-during-load.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/a-user-click-during-load.html
new file mode 100644
index 0000000000..811c828331
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/a-user-click-during-load.html
@@ -0,0 +1,36 @@
+
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/a-user-click-during-pageshow.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/a-user-click-during-pageshow.html
new file mode 100644
index 0000000000..6621b081e1
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/a-user-click-during-pageshow.html
@@ -0,0 +1,36 @@
+
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/a-user-click.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/a-user-click.html
new file mode 100644
index 0000000000..c9034f3573
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/a-user-click.html
@@ -0,0 +1,34 @@
+
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-requestsubmit-during-load.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-requestsubmit-during-load.html
new file mode 100644
index 0000000000..0dee49edb3
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-requestsubmit-during-load.html
@@ -0,0 +1,41 @@
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-requestsubmit-during-pageshow.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-requestsubmit-during-pageshow.html
new file mode 100644
index 0000000000..0cf0838496
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-requestsubmit-during-pageshow.html
@@ -0,0 +1,41 @@
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-requestsubmit.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-requestsubmit.html
new file mode 100644
index 0000000000..80beb3718b
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-requestsubmit.html
@@ -0,0 +1,39 @@
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-submit-button-click-during-load.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-submit-button-click-during-load.html
new file mode 100644
index 0000000000..1b3a163176
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-submit-button-click-during-load.html
@@ -0,0 +1,45 @@
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-submit-button-click-during-pageshow.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-submit-button-click-during-pageshow.html
new file mode 100644
index 0000000000..c0022fd0f2
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-submit-button-click-during-pageshow.html
@@ -0,0 +1,45 @@
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-submit-button-click.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-submit-button-click.html
new file mode 100644
index 0000000000..873c49b5be
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-submit-button-click.html
@@ -0,0 +1,43 @@
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-submit-cross-frame-crossorigin.sub.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-submit-cross-frame-crossorigin.sub.html
new file mode 100644
index 0000000000..a2ea20bf7f
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-submit-cross-frame-crossorigin.sub.html
@@ -0,0 +1,42 @@
+
+
+
+
+
+
+

+  
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-submit-cross-frame.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-submit-cross-frame.html
new file mode 100644
index 0000000000..d647e6ad06
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-submit-cross-frame.html
@@ -0,0 +1,40 @@
+
+
+
+
+
+
+

+  
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-submit-during-load.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-submit-during-load.html
new file mode 100644
index 0000000000..2a60f44fc6
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-submit-during-load.html
@@ -0,0 +1,41 @@
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-submit-during-pageshow.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-submit-during-pageshow.html
new file mode 100644
index 0000000000..886bf469a2
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-submit-during-pageshow.html
@@ -0,0 +1,41 @@
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-submit-popup-crossorigin.sub.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-submit-popup-crossorigin.sub.html
new file mode 100644
index 0000000000..d54cc81477
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-submit-popup-crossorigin.sub.html
@@ -0,0 +1,39 @@
+
+
+
+
+
+
+

+  
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-submit-popup.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-submit-popup.html
new file mode 100644
index 0000000000..b27d54675d
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-submit-popup.html
@@ -0,0 +1,37 @@
+
+
+
+
+
+
+

+  
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-submit.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-submit.html
new file mode 100644
index 0000000000..eace0b0a69
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-submit.html
@@ -0,0 +1,39 @@
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/history-pushstate-during-load.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/history-pushstate-during-load.html
new file mode 100644
index 0000000000..233d80d8d7
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/history-pushstate-during-load.html
@@ -0,0 +1,28 @@
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/history-pushstate-during-pageshow.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/history-pushstate-during-pageshow.html
new file mode 100644
index 0000000000..a4e83baf1d
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/history-pushstate-during-pageshow.html
@@ -0,0 +1,29 @@
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/history-pushstate.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/history-pushstate.html
new file mode 100644
index 0000000000..2faef7c319
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/history-pushstate.html
@@ -0,0 +1,22 @@
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/iframe-src-during-load.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/iframe-src-during-load.html
new file mode 100644
index 0000000000..83f26b2aa9
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/iframe-src-during-load.html
@@ -0,0 +1,31 @@
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/iframe-src-during-pageshow.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/iframe-src-during-pageshow.html
new file mode 100644
index 0000000000..61345cf7f9
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/iframe-src-during-pageshow.html
@@ -0,0 +1,31 @@
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/iframe-src.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/iframe-src.html
new file mode 100644
index 0000000000..47407c106e
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/iframe-src.html
@@ -0,0 +1,39 @@
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/location-assign-during-load.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/location-assign-during-load.html
new file mode 100644
index 0000000000..2b4ac49533
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/location-assign-during-load.html
@@ -0,0 +1,31 @@
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/location-assign-during-pageshow.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/location-assign-during-pageshow.html
new file mode 100644
index 0000000000..0f84cbe246
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/location-assign-during-pageshow.html
@@ -0,0 +1,31 @@
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/location-assign-user-click.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/location-assign-user-click.html
new file mode 100644
index 0000000000..785ec024e0
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/location-assign-user-click.html
@@ -0,0 +1,34 @@
+
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/location-assign.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/location-assign.html
new file mode 100644
index 0000000000..53ea96ffea
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/location-assign.html
@@ -0,0 +1,25 @@
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/location-setter-during-load.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/location-setter-during-load.html
new file mode 100644
index 0000000000..e4c8ca80a1
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/location-setter-during-load.html
@@ -0,0 +1,76 @@
+
+
+Replace during the load event, triggered by location setters
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/location-setter-during-pageshow.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/location-setter-during-pageshow.html
new file mode 100644
index 0000000000..9997783ff5
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/location-setter-during-pageshow.html
@@ -0,0 +1,77 @@
+
+
+Replace during the pageshow event, triggered by location setters
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/location-setter-user-click.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/location-setter-user-click.html
new file mode 100644
index 0000000000..9276327f1a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/location-setter-user-click.html
@@ -0,0 +1,82 @@
+
+
+No replace before load, triggered by location setters called as part of user-initiated clicks
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/location-setter-user-mouseup.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/location-setter-user-mouseup.html
new file mode 100644
index 0000000000..9068e5a116
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/location-setter-user-mouseup.html
@@ -0,0 +1,89 @@
+
+
+No replace before load, triggered by location setters called as part of user-initiated mouseups
+
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/location-setter.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/location-setter.html
new file mode 100644
index 0000000000..b8049f084b
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/location-setter.html
@@ -0,0 +1,58 @@
+
+
+Replace before load, triggered by location setters
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/resources/code-injector.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/resources/code-injector.html
new file mode 100644
index 0000000000..73dacf0d76
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/resources/code-injector.html
@@ -0,0 +1,9 @@
+
+
+Subframe
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/resources/helpers.js b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/resources/helpers.js
new file mode 100644
index 0000000000..58102aa925
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/resources/helpers.js
@@ -0,0 +1,89 @@
+window.waitForLoad = (t, iframe, urlRelativeToThisDocument) => {
+  return new Promise(resolve => {
+    iframe.addEventListener("load", t.step_func(() => {
+      assert_equals(iframe.contentWindow.location.href, (new URL(urlRelativeToThisDocument, location.href)).href);
+
+      // Wait a bit longer to ensure all history stuff has settled, e.g. the document is "completely loaded"
+      // (which happens from a queued task).
+      setTimeout(resolve, 0);
+    }), { once: true });
+  });
+};
+
+window.waitForLoadAllowingIntermediateLoads = (t, iframe, urlRelativeToThisDocument) => {
+  return new Promise(resolve => {
+    const handler = t.step_func(() => {
+      if (iframe.contentWindow.location.href === (new URL(urlRelativeToThisDocument, location.href)).href) {
+        // Wait a bit longer to ensure all history stuff has settled, e.g. the document is "completely loaded"
+        // (which happens from a queued task).
+        setTimeout(resolve, 0);
+        iframe.removeEventListener("load", handler);
+      }
+    });
+
+    iframe.addEventListener("load", handler);
+  });
+};
+
+window.waitForMessage = () => {
+  return new Promise(resolve => {
+    window.addEventListener("message", e => {
+      resolve(e.data);
+    }, { once: true });
+  });
+};
+
+window.setupSentinelIframe = async (t) => {
+  // If this iframe gets navigated by history.back(), then the iframe under test did not, so we did a replace.
+  const sentinelIframe = document.createElement("iframe");
+  sentinelIframe.src = "/common/blank.html?sentinelstart";
+  document.body.append(sentinelIframe);
+  t.add_cleanup(() => sentinelIframe.remove());
+
+  await waitForLoad(t, sentinelIframe, "/common/blank.html?sentinelstart");
+
+  sentinelIframe.src = "/common/blank.html?sentinelend";
+  await waitForLoad(t, sentinelIframe, "/common/blank.html?sentinelend");
+
+  return sentinelIframe;
+};
+
+window.checkSentinelIframe = async (t, sentinelIframe) => {
+  // Go back. Since iframe should have done a replace, this should move sentinelIframe back, not iframe.
+  history.back();
+  await waitForLoad(t, sentinelIframe, "/common/blank.html?sentinelstart");
+};
+
+window.insertIframe = (t, url, name) => {
+  const iframe = document.createElement("iframe");
+  iframe.src = url;
+
+  // In at least Chromium, window name targeting for form submission doesn't work if the name is set
+  // after the iframe is inserted into the DOM. So we can't just have callers do this themselves.
+  if (name) {
+    iframe.name = name;
+  }
+
+  document.body.append(iframe);
+
+  // Intentionally not including the following:
+  //  t.add_cleanup(() => iframe.remove());
+  // Doing so breaks some of the testdriver.js tests with "cannot find window" errors.
+  return iframe;
+};
+
+// TODO(domenic): clean up other tests in the parent directory to use this.
+window.absoluteURL = relativeURL => {
+  return (new URL(relativeURL, location.href)).href;
+};
+
+// TODO(domenic): clean up other tests in the parent directory to use this.
+window.codeInjectorURL = code => {
+  return absoluteURL("resources/code-injector.html?pipe=sub(none)&code=" + encodeURIComponent(code));
+};
+
+window.changeURLHost = (url, newHost) => {
+  const urlObj = new URL(url);
+  urlObj.host = newHost;
+  return urlObj.href;
+};
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/resources/message-opener.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/resources/message-opener.html
new file mode 100644
index 0000000000..b6f9d31358
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/resources/message-opener.html
@@ -0,0 +1,8 @@
+
+
+Popup
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/resources/slow-code-injector.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/resources/slow-code-injector.html
new file mode 100644
index 0000000000..b7e99dcbfa
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/resources/slow-code-injector.html
@@ -0,0 +1,16 @@
+
+
+Subframe
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/resources/slow-message-source-with-history-and-location.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/resources/slow-message-source-with-history-and-location.html
new file mode 100644
index 0000000000..da279ebf82
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/resources/slow-message-source-with-history-and-location.html
@@ -0,0 +1,16 @@
+
+
+Subframe or popup
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/window-open-popup-during-load.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/window-open-popup-during-load.html
new file mode 100644
index 0000000000..5308c01c39
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/window-open-popup-during-load.html
@@ -0,0 +1,67 @@
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/window-open-popup-during-pageshow.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/window-open-popup-during-pageshow.html
new file mode 100644
index 0000000000..065d933225
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/window-open-popup-during-pageshow.html
@@ -0,0 +1,67 @@
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/window-open-popup.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/window-open-popup.html
new file mode 100644
index 0000000000..7b3e05f8f6
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/window-open-popup.html
@@ -0,0 +1,49 @@
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/window-open-self-during-load.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/window-open-self-during-load.html
new file mode 100644
index 0000000000..255601ba8d
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/window-open-self-during-load.html
@@ -0,0 +1,29 @@
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/window-open-self-during-pageshow.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/window-open-self-during-pageshow.html
new file mode 100644
index 0000000000..a8327cfac3
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/window-open-self-during-pageshow.html
@@ -0,0 +1,29 @@
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/window-open-self.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/window-open-self.html
new file mode 100644
index 0000000000..10e8f38001
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/window-open-self.html
@@ -0,0 +1,23 @@
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/blank.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/blank.html
new file mode 100644
index 0000000000..c50eddd41f
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/blank.html
@@ -0,0 +1 @@
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/child-navigates-parent-cross-origin-inner.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/child-navigates-parent-cross-origin-inner.html
new file mode 100644
index 0000000000..72b92c8061
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/child-navigates-parent-cross-origin-inner.html
@@ -0,0 +1,20 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/child-navigates-parent-destination.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/child-navigates-parent-destination.html
new file mode 100644
index 0000000000..bb8ba4e698
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/child-navigates-parent-destination.html
@@ -0,0 +1,4 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/child-navigates-parent-location-initial.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/child-navigates-parent-location-initial.html
new file mode 100644
index 0000000000..a4a1713a27
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/child-navigates-parent-location-initial.html
@@ -0,0 +1,3 @@
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/child-navigates-parent-location-inner.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/child-navigates-parent-location-inner.html
new file mode 100644
index 0000000000..4d7d24730f
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/child-navigates-parent-location-inner.html
@@ -0,0 +1,5 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/child-navigates-parent-submit-initial.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/child-navigates-parent-submit-initial.html
new file mode 100644
index 0000000000..943708e0cd
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/child-navigates-parent-submit-initial.html
@@ -0,0 +1,3 @@
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/child-navigates-parent-submit-inner.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/child-navigates-parent-submit-inner.html
new file mode 100644
index 0000000000..0b49e13d65
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/child-navigates-parent-submit-inner.html
@@ -0,0 +1,6 @@
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/click.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/click.html
new file mode 100644
index 0000000000..8cb03b74d5
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/click.html
@@ -0,0 +1,4 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/document-domain-set-to-site.sub.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/document-domain-set-to-site.sub.html
new file mode 100644
index 0000000000..3c4355c452
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/document-domain-set-to-site.sub.html
@@ -0,0 +1,7 @@
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/form.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/form.html
new file mode 100644
index 0000000000..6523a82b39
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/form.html
@@ -0,0 +1,5 @@
+
+
+form navigation
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/href.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/href.html
new file mode 100644
index 0000000000..eccadadf41
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/href.html
@@ -0,0 +1,5 @@
+
+
+href
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/message-opener.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/message-opener.html
new file mode 100644
index 0000000000..b6f9d31358
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/message-opener.html
@@ -0,0 +1,8 @@
+
+
+Popup
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/message-parent.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/message-parent.html
new file mode 100644
index 0000000000..3656358f2d
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/message-parent.html
@@ -0,0 +1,3 @@
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/multi-globals-subframe-1.sub.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/multi-globals-subframe-1.sub.html
new file mode 100644
index 0000000000..a87b2fd2be
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/multi-globals-subframe-1.sub.html
@@ -0,0 +1,10 @@
+
+
+Multi-globals test outer subframe
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/multi-globals-subframe-2.sub.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/multi-globals-subframe-2.sub.html
new file mode 100644
index 0000000000..593c428a67
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/multi-globals-subframe-2.sub.html
@@ -0,0 +1,8 @@
+
+
+Multi-globals test inner subframe
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/no-cache-single-redirect.py b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/no-cache-single-redirect.py
new file mode 100644
index 0000000000..9d3aff817d
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/no-cache-single-redirect.py
@@ -0,0 +1,21 @@
+# This handler receives requests identified by UUIDs that have mandatory
+# `location` query parameters. Every other request for the same URL will result
+# in a redirect to the URL described by `location`. When we don't redirect, we
+# simply return the HTML document "No redirect".
+def main(request, response):
+    response.headers.set(b"Cache-Control", b"no-store")
+
+    uuid = request.GET.first(b"uuid")
+    value = request.server.stash.take(uuid)
+
+    if value is None:
+        response.status = 302
+        location = request.GET.first(b"location")
+        response.headers.set(b"Location", location)
+        # Ensure that the next time this uuid is request, we don't redirect.
+        request.server.stash.put(uuid, "sentinel value")
+    else:
+        # If we're in this branch, then `value` is not none, but the stash now
+        # has `None` associated with `uuid`, which means on the next request for
+        # this `uuid` we'll end up in the above branch instead.
+        return ([(b"Content-Type", b"text/html")], b"No redirect")
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/page-that-post-message-to-opener.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/page-that-post-message-to-opener.html
new file mode 100644
index 0000000000..65a0c82149
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/page-that-post-message-to-opener.html
@@ -0,0 +1,6 @@
+
+
+Page that postMessage to its opener
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/page-with-top-navigating-iframe.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/page-with-top-navigating-iframe.html
new file mode 100644
index 0000000000..568e44296f
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/page-with-top-navigating-iframe.html
@@ -0,0 +1,24 @@
+
+
+
+
+
+Page that embeds an iframe that navigates its top
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/portable-document-format-sample-valid.pdf b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/portable-document-format-sample-valid.pdf
new file mode 100644
index 0000000000..d008b1f23a
Binary files /dev/null and b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/portable-document-format-sample-valid.pdf differ
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/portable-document-format-sample-valid.pdf.headers b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/portable-document-format-sample-valid.pdf.headers
new file mode 100644
index 0000000000..5a8e57e482
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/portable-document-format-sample-valid.pdf.headers
@@ -0,0 +1 @@
+Content-Type: application/pdf
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/redirect.py b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/redirect.py
new file mode 100644
index 0000000000..3c78c256b0
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/redirect.py
@@ -0,0 +1,4 @@
+def main(request, response):
+    location = request.GET.first(b"location")
+    response.status = 302
+    response.headers.set(b"Location", location)
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/top-navigating-page.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/top-navigating-page.html
new file mode 100644
index 0000000000..557f408fba
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/top-navigating-page.html
@@ -0,0 +1,15 @@
+
+
+Page that navigates its top
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/wait-for-messages.js b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/wait-for-messages.js
new file mode 100644
index 0000000000..62ddec49f1
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/wait-for-messages.js
@@ -0,0 +1,15 @@
+// Asynchronous function that waits for the given number of messages to be
+// received by `window`, then returns those messages.
+function waitForMessages(numMessages) {
+  return new Promise((resolve) => {
+    const messages = [];
+
+    window.addEventListener("message", function handler(evt) {
+      messages.push(evt.data);
+      if (messages.length == numMessages) {
+        window.removeEventListener("message", handler);
+        resolve(messages);
+      }
+    });
+  });
+}
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/xhtml-and-non-utf-8.xhtml b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/xhtml-and-non-utf-8.xhtml
new file mode 100644
index 0000000000..3aacf33f1c
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/resources/xhtml-and-non-utf-8.xhtml
@@ -0,0 +1,9 @@
+
+
+
+  
+  A test document used when you need something very non-default
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/source/navigate-child-function-parent-then-fragment.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/source/navigate-child-function-parent-then-fragment.html
new file mode 100644
index 0000000000..d01ef4c77a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/source/navigate-child-function-parent-then-fragment.html
@@ -0,0 +1,36 @@
+
+
+
+  Set location from a parent, then do a fragment navigation from within the
+  frame.
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/source/navigate-child-function-parent.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/source/navigate-child-function-parent.html
new file mode 100644
index 0000000000..2efc3a6b4a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/source/navigate-child-function-parent.html
@@ -0,0 +1,18 @@
+
+
+Set location from a parent
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/source/navigate-child-function-src.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/source/navigate-child-function-src.html
new file mode 100644
index 0000000000..e21260cd35
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/source/navigate-child-function-src.html
@@ -0,0 +1,18 @@
+
+
+Set src from a function called from a parent
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/source/navigate-child-function.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/source/navigate-child-function.html
new file mode 100644
index 0000000000..c6fa765b89
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/source/navigate-child-function.html
@@ -0,0 +1,19 @@
+
+
+Set location from a function called from a parent
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/source/navigate-child-src-about-blank.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/source/navigate-child-src-about-blank.html
new file mode 100644
index 0000000000..479019d847
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/source/navigate-child-src-about-blank.html
@@ -0,0 +1,20 @@
+
+
+Set the src attribute to about:blank and check referrer
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/source/support/dummy.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/source/support/dummy.html
new file mode 100644
index 0000000000..0638657093
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/source/support/dummy.html
@@ -0,0 +1,3 @@
+
+
+
Hello.
\ No newline at end of file
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/source/support/location-set.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/source/support/location-set.html
new file mode 100644
index 0000000000..ad733afac3
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/source/support/location-set.html
@@ -0,0 +1,8 @@
+
+
+
+
Hello. Go.
\ No newline at end of file
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/source/support/set-parent-src.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/source/support/set-parent-src.html
new file mode 100644
index 0000000000..9d45be8c8d
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/source/support/set-parent-src.html
@@ -0,0 +1,8 @@
+
+
+
+
Hello. Go.
\ No newline at end of file
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/top-level-data-url.window.js b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/top-level-data-url.window.js
new file mode 100644
index 0000000000..ca321f106a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/top-level-data-url.window.js
@@ -0,0 +1,20 @@
+// META: timeout=long
+
+const dataURL = `data:text/html,...`;
+const encodedDataURL = encodeURIComponent(dataURL);
+
+[dataURL, `resources/redirect.py?location=${encodedDataURL}`].forEach(url => {
+  [undefined, "opener", "noopener", "noreferrer"].forEach(opener => {
+    async_test(t => {
+      const popup = window.open(url, "", opener);
+      t.step_timeout(() => {
+        if (opener === "noopener" || opener == "noreferrer") {
+          assert_equals(popup, null);
+        } else {
+          assert_true(popup.closed);
+        }
+        t.done();
+      }, 1500);
+    }, `Navigating a popup using window.open("${url}", "", "${opener}")`);
+  });
+});
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/README.md b/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/README.md
new file mode 100644
index 0000000000..cc313a155a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/README.md
@@ -0,0 +1,11 @@
+# Overlapping navigation and traversal tests
+
+These tests follow the behavior outlined in the
+[session history rewrite](https://github.com/whatwg/html/pull/6315).
+
+ discusses these results.
+
+We are not yet 100% sure on this behavior, especially for overlapping
+traversal cases where the spec is complex and some of the tests don't
+seem to match any browser. Please feel free to discuss on the spec
+issue.
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/anchor-fragment-history-back-on-click.html b/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/anchor-fragment-history-back-on-click.html
new file mode 100644
index 0000000000..a081bec514
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/anchor-fragment-history-back-on-click.html
@@ -0,0 +1,40 @@
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/cross-document-nav-cross-document-nav.html b/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/cross-document-nav-cross-document-nav.html
new file mode 100644
index 0000000000..99d9a8fbb1
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/cross-document-nav-cross-document-nav.html
@@ -0,0 +1,30 @@
+
+
+Cross-document navigation after a cross-document navigation
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/cross-document-nav-cross-document-traversal.html b/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/cross-document-nav-cross-document-traversal.html
new file mode 100644
index 0000000000..341f66a996
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/cross-document-nav-cross-document-traversal.html
@@ -0,0 +1,38 @@
+
+
+Cross-document traversal during cross-document navigation
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/cross-document-nav-same-document-nav.html b/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/cross-document-nav-same-document-nav.html
new file mode 100644
index 0000000000..99525cb3ed
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/cross-document-nav-same-document-nav.html
@@ -0,0 +1,44 @@
+
+
+Cross-document navigation after a same-document navigation
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/cross-document-nav-same-document-traversal.html b/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/cross-document-nav-same-document-traversal.html
new file mode 100644
index 0000000000..2ff91be7e1
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/cross-document-nav-same-document-traversal.html
@@ -0,0 +1,37 @@
+
+
+Same-document traversal during cross-document navigation
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/cross-document-nav-stop.html b/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/cross-document-nav-stop.html
new file mode 100644
index 0000000000..0803d6c8d1
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/cross-document-nav-stop.html
@@ -0,0 +1,21 @@
+
+
+Stop during cross-document navigations
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/cross-document-traversal-cross-document-nav.html b/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/cross-document-traversal-cross-document-nav.html
new file mode 100644
index 0000000000..5141259d08
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/cross-document-traversal-cross-document-nav.html
@@ -0,0 +1,77 @@
+
+
+Cross-document navigations during cross-document traversals
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/cross-document-traversal-cross-document-traversal.html b/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/cross-document-traversal-cross-document-traversal.html
new file mode 100644
index 0000000000..97907df23d
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/cross-document-traversal-cross-document-traversal.html
@@ -0,0 +1,160 @@
+
+
+Cross-document traversals during cross-document traversals
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/cross-document-traversal-same-document-nav.html b/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/cross-document-traversal-same-document-nav.html
new file mode 100644
index 0000000000..df6258f9b3
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/cross-document-traversal-same-document-nav.html
@@ -0,0 +1,66 @@
+
+
+Same-document navigations during cross-document traversals
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/cross-document-traversal-same-document-traversal.html b/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/cross-document-traversal-same-document-traversal.html
new file mode 100644
index 0000000000..3c37c46b64
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/cross-document-traversal-same-document-traversal.html
@@ -0,0 +1,94 @@
+
+
+Same-document traversals during cross-document traversals
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/cross-document-traversal-stop.html b/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/cross-document-traversal-stop.html
new file mode 100644
index 0000000000..6202eb9226
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/cross-document-traversal-stop.html
@@ -0,0 +1,42 @@
+
+
+Stop during cross-document traversals
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/forward-to-pruned-entry.html b/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/forward-to-pruned-entry.html
new file mode 100644
index 0000000000..8e1c349e21
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/forward-to-pruned-entry.html
@@ -0,0 +1,24 @@
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/nav-cancelation-1.html b/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/nav-cancelation-1.html
new file mode 100644
index 0000000000..b52fa04977
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/nav-cancelation-1.html
@@ -0,0 +1,62 @@
+
+
+Parent main frame cancels a same-origin child whose navigation is pending
+
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/nav-cancelation-2.sub.html b/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/nav-cancelation-2.sub.html
new file mode 100644
index 0000000000..c081513b7c
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/nav-cancelation-2.sub.html
@@ -0,0 +1,178 @@
+
+
+Grandparent main frame cancels a navigation in a cross-origin grandchild
+
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/resources/helpers.mjs b/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/resources/helpers.mjs
new file mode 100644
index 0000000000..7938497920
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/resources/helpers.mjs
@@ -0,0 +1,52 @@
+export function createIframe(t) {
+  return new Promise((resolve, reject) => {
+    const iframe = document.createElement("iframe");
+    iframe.onload = () => resolve(iframe);
+    iframe.onerror = () => reject(new Error("Could not load iframe"));
+    iframe.src = "/common/blank.html";
+
+    t.add_cleanup(() => iframe.remove());
+    document.body.append(iframe);
+  });
+}
+
+export function delay(t, ms) {
+  return new Promise(resolve => t.step_timeout(resolve, ms));
+}
+
+export function waitForLoad(obj) {
+  return new Promise(resolve => {
+    obj.addEventListener("load", resolve, { once: true });
+  });
+}
+
+export function waitForHashchange(obj) {
+  return new Promise(resolve => {
+    obj.addEventListener("hashchange", resolve, { once: true });
+  });
+}
+
+export function waitForPopstate(obj) {
+  return new Promise(resolve => {
+    obj.addEventListener("popstate", resolve, { once: true });
+  });
+}
+
+// This is used when we want to end the test by asserting some load doesn't
+// happen, but we're not sure how long to wait. We could just wait a long-ish
+// time (e.g. a second), but that makes the tests slow. Instead, assume that
+// network loads take roughly the same time. Then, you can use this function to
+// wait a small multiple of the duration of a separate iframe load; this should
+// be long enough to catch any problems.
+export async function waitForPotentialNetworkLoads(t) {
+  const before = performance.now();
+
+  // Sometimes we're doing something, like a traversal, which cancels our first
+  // attempt at iframe loading. In that case we bail out after 100 ms and try
+  // again. (Better ideas welcome...)
+  await Promise.race([createIframe(t), delay(t, 100)]);
+  await createIframe(t);
+
+  const after = performance.now();
+  await delay(t, after - before);
+}
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/resources/nav-cancelation-2-helper.html b/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/resources/nav-cancelation-2-helper.html
new file mode 100644
index 0000000000..a0b4acda2e
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/resources/nav-cancelation-2-helper.html
@@ -0,0 +1,18 @@
+
+
+Page with child frame that navigates slowly
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/resources/slow.py b/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/resources/slow.py
new file mode 100644
index 0000000000..5ee32a60ba
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/resources/slow.py
@@ -0,0 +1,7 @@
+# Like /common/slow.py except with text/html content-type so that it won't
+# trigger strange parts of the 
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/read-media/pageload-video.html b/testing/web-platform/tests/html/browsers/browsing-the-web/read-media/pageload-video.html
new file mode 100644
index 0000000000..9bce1f0c36
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/read-media/pageload-video.html
@@ -0,0 +1,28 @@
+
+
+Media documents: video
+
+
+
+
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/read-media/resources/iframe-document.sub.html b/testing/web-platform/tests/html/browsers/browsing-the-web/read-media/resources/iframe-document.sub.html
new file mode 100644
index 0000000000..69523efa7a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/read-media/resources/iframe-document.sub.html
@@ -0,0 +1,5 @@
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/read-text/load-text-plain.html b/testing/web-platform/tests/html/browsers/browsing-the-web/read-text/load-text-plain.html
new file mode 100644
index 0000000000..ad75631533
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/read-text/load-text-plain.html
@@ -0,0 +1,40 @@
+
+Page load processing model for text files
+
+
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/addHTML.window.js b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/addHTML.window.js
new file mode 100644
index 0000000000..0c093cc462
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/addHTML.window.js
@@ -0,0 +1,20 @@
+// META: title=RemoteContextWrapper addHtml
+// META: script=/common/dispatcher/dispatcher.js
+// META: script=/common/get-host-info.sub.js
+// META: script=/common/utils.js
+// META: script=/html/browsers/browsing-the-web/remote-context-helper/resources/remote-context-helper.js
+// META: script=./resources/test-helper.js
+
+'use strict';
+
+// This tests that arguments passed to the constructor are respected.
+promise_test(async t => {
+  const rcHelper = new RemoteContextHelper();
+
+  const main = await rcHelper.addWindow();
+  await assertSimplestScriptRuns(main);
+
+  await main.addHTML('
div-content
');
+  await assertFunctionRuns(
+      main, () => document.getElementById('div-id').textContent, 'div-content');
+});
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/addIframe-srcdoc-startOn.window.js b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/addIframe-srcdoc-startOn.window.js
new file mode 100644
index 0000000000..2ef047c212
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/addIframe-srcdoc-startOn.window.js
@@ -0,0 +1,24 @@
+// META: title=RemoteContextWrapper addIframe with srcdoc and startOn
+// META: script=/common/dispatcher/dispatcher.js
+// META: script=/common/get-host-info.sub.js
+// META: script=/common/utils.js
+// META: script=/html/browsers/browsing-the-web/remote-context-helper/resources/remote-context-helper.js
+// META: script=./resources/test-helper.js
+
+'use strict';
+
+promise_test(async t => {
+  const rcHelper = new RemoteContextHelper();
+
+  const main = await rcHelper.addWindow();
+
+  const iframe = await main.addIframeSrcdoc(
+      /*extraConfig=*/ {startOn: 'pageshow'});
+
+  await assertSimplestScriptRuns(iframe);
+  await assert_equals(
+      await iframe.executeScript(() => {
+        return executorStartEvent.type;
+      }),
+      'pageshow');
+});
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/addIframe-srcdoc.window.js b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/addIframe-srcdoc.window.js
new file mode 100644
index 0000000000..1a959cbaf0
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/addIframe-srcdoc.window.js
@@ -0,0 +1,27 @@
+// META: title=RemoteContextWrapper addIframe with srcdoc
+// META: script=/common/dispatcher/dispatcher.js
+// META: script=/common/get-host-info.sub.js
+// META: script=/common/utils.js
+// META: script=/html/browsers/browsing-the-web/remote-context-helper/resources/remote-context-helper.js
+// META: script=./resources/test-helper.js
+
+'use strict';
+
+// This tests that arguments passed to the constructor are respected.
+promise_test(async t => {
+  const rcHelper = new RemoteContextHelper();
+
+  const main = await rcHelper.addWindow();
+
+  const iframe = await main.addIframeSrcdoc(
+      /*extraConfig=*/ {scripts: ['./resources/test-script.js']},
+      /*attributes=*/ {id: 'test-id'},
+  );
+
+  await assertSimplestScriptRuns(iframe);
+  await assertFunctionRuns(iframe, () => testFunction(), 'testFunction exists');
+
+  assert_equals(
+      await main.executeScript(() => document.getElementById('test-id').id),
+      'test-id', 'verify id');
+});
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/addIframe.window.js b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/addIframe.window.js
new file mode 100644
index 0000000000..c1630e4680
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/addIframe.window.js
@@ -0,0 +1,40 @@
+// META: title=RemoteContextWrapper addIframe
+// META: script=/common/dispatcher/dispatcher.js
+// META: script=/common/get-host-info.sub.js
+// META: script=/common/utils.js
+// META: script=/html/browsers/browsing-the-web/remote-context-helper/resources/remote-context-helper.js
+// META: script=./resources/test-helper.js
+
+'use strict';
+
+// This tests that arguments passed to the constructor are respected.
+promise_test(async t => {
+  // Precondition: Test was loaded from the HTTP_ORIGIN.
+  assert_equals(
+      location.origin, get_host_info()['HTTP_ORIGIN'],
+      'test window was loaded on HTTP_ORIGIN');
+
+  const rcHelper = new RemoteContextHelper();
+
+  const main = await rcHelper.addWindow();
+
+  const headerName = 'x-wpt-test-header';
+  const headerValue = 'test-escaping()';
+  const iframe = await main.addIframe(
+      /*extraConfig=*/ {
+        origin: 'HTTP_REMOTE_ORIGIN',
+        scripts: ['/common/get-host-info.sub.js', './resources/test-script.js'],
+        headers: [[headerName, headerValue]],
+      },
+      /*attributes=*/ {id: 'test-id'},
+  );
+
+  await assertSimplestScriptRuns(iframe);
+  await assertFunctionRuns(iframe, () => testFunction(), 'testFunction exists');
+  await assertOriginIsAsExpected(iframe, get_host_info()['HTTP_REMOTE_ORIGIN']);
+  await assertHeaderIsAsExpected(iframe, headerName, headerValue);
+
+  assert_equals(
+      await main.executeScript(() => document.getElementById('test-id').id),
+      'test-id', 'verify id');
+});
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/addScripts.window.js b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/addScripts.window.js
new file mode 100644
index 0000000000..01cf06c65d
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/addScripts.window.js
@@ -0,0 +1,19 @@
+// META: title=RemoteContextWrapper addScripts
+// META: script=/common/dispatcher/dispatcher.js
+// META: script=/common/get-host-info.sub.js
+// META: script=/common/utils.js
+// META: script=/html/browsers/browsing-the-web/remote-context-helper/resources/remote-context-helper.js
+// META: script=./resources/test-helper.js
+
+'use strict';
+
+// This tests that arguments passed to the constructor are respected.
+promise_test(async t => {
+  const rcHelper = new RemoteContextHelper();
+
+  const main = await rcHelper.addWindow();
+  await assertSimplestScriptRuns(main);
+
+  await main.addScripts(['./resources/test-script.js']);
+  await assertFunctionRuns(main, () => testFunction(), 'testFunction exists');
+});
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/addWindow-defaults.window.js b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/addWindow-defaults.window.js
new file mode 100644
index 0000000000..34fa9cd39a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/addWindow-defaults.window.js
@@ -0,0 +1,15 @@
+// META: title=RemoteContextHelper with defaults
+// META: script=/common/dispatcher/dispatcher.js
+// META: script=/common/get-host-info.sub.js
+// META: script=/common/utils.js
+// META: script=/html/browsers/browsing-the-web/remote-context-helper/resources/remote-context-helper.js
+// META: script=./resources/test-helper.js
+
+'use strict';
+
+promise_test(async t => {
+  const rcHelper = new RemoteContextHelper();
+  const main = await rcHelper.addWindow();
+  await assertSimplestScriptRuns(main);
+  await assertOriginIsAsExpected(main, location.origin);
+});
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/addWindow-extra-config.window.js b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/addWindow-extra-config.window.js
new file mode 100644
index 0000000000..112d2d726e
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/addWindow-extra-config.window.js
@@ -0,0 +1,36 @@
+// META: title=RemoteContextHelper addWindow with extra config
+// META: script=/common/dispatcher/dispatcher.js
+// META: script=/common/get-host-info.sub.js
+// META: script=/common/utils.js
+// META: script=/html/browsers/browsing-the-web/remote-context-helper/resources/remote-context-helper.js
+// META: script=./resources/test-helper.js
+
+'use strict';
+
+// This tests that arguments passed to the constructor are respected.
+promise_test(async t => {
+  const header1Name = 'x-wpt-test-header1';
+  const header1Value = 'test-escaping1()';
+  const rcHelper = new RemoteContextHelper({
+    origin: 'HTTP_REMOTE_ORIGIN',
+    scripts: ['/common/get-host-info.sub.js', './resources/test-script.js'],
+    headers: [[header1Name, header1Value]],
+  });
+
+  const header2Name = 'x-wpt-test-header2';
+  const header2Value = 'test-escaping2()';
+  const main = await rcHelper.addWindow(
+      {
+        origin: location.origin,
+        scripts: [new URL('./resources/test-script2.js', location).toString()],
+        headers: [[header2Name, header2Value]],
+      },
+  );
+
+  await assertSimplestScriptRuns(main);
+  await assertFunctionRuns(main, () => testFunction(), 'testFunction exists');
+  await assertFunctionRuns(main, () => testFunction2(), 'testFunction2 exists');
+  await assertOriginIsAsExpected(main, location.origin);
+  await assertHeaderIsAsExpected(main, header1Name, header1Value);
+  await assertHeaderIsAsExpected(main, header2Name, header2Value);
+});
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/addWindow-features.window.js b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/addWindow-features.window.js
new file mode 100644
index 0000000000..329c55e626
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/addWindow-features.window.js
@@ -0,0 +1,23 @@
+// META: title=RemoteContextHelper addWindow features
+// META: script=/common/dispatcher/dispatcher.js
+// META: script=/common/get-host-info.sub.js
+// META: script=/common/utils.js
+// META: script=/html/browsers/browsing-the-web/remote-context-helper/resources/remote-context-helper.js
+// META: script=./resources/test-helper.js
+
+'use strict';
+
+promise_test(async t => {
+  const rcHelper = new RemoteContextHelper();
+  {
+    const main = await rcHelper.addWindow();
+    await assertSimplestScriptRuns(main);
+    await assertWindowHasOpenerEquals(main, true);
+  }
+  {
+    const main = await rcHelper.addWindow(
+        /*extraConfig=*/ null, /*options=*/ {features: 'noopener'});
+    await assertSimplestScriptRuns(main);
+    await assertWindowHasOpenerEquals(main, false);
+  }
+});
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/addWindow-invalid-origin.window.js b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/addWindow-invalid-origin.window.js
new file mode 100644
index 0000000000..58aee312cc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/addWindow-invalid-origin.window.js
@@ -0,0 +1,21 @@
+// META: title=RemoteContextHelper addWindow with extra config
+// META: script=/common/dispatcher/dispatcher.js
+// META: script=/common/get-host-info.sub.js
+// META: script=/common/utils.js
+// META: script=/html/browsers/browsing-the-web/remote-context-helper/resources/remote-context-helper.js
+// META: script=./resources/test-helper.js
+
+'use strict';
+
+// This tests that arguments passed to the constructor are respected.
+promise_test(async t => {
+  const header1Name = 'x-wpt-test-header1';
+  const header1Value = 'test-escaping1()';
+  const rcHelper = new RemoteContextHelper({
+    origin: 'INVALID',
+  });
+
+  promise_rejects_js(
+      t, RangeError, rcHelper.addWindow(),
+      'Exception should be thrown for invalid origin.');
+});
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/addWindow-startOn.window.js b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/addWindow-startOn.window.js
new file mode 100644
index 0000000000..0f57a87638
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/addWindow-startOn.window.js
@@ -0,0 +1,19 @@
+// META: title=RemoteContextHelper addWindow target
+// META: script=/common/dispatcher/dispatcher.js
+// META: script=/common/get-host-info.sub.js
+// META: script=/common/utils.js
+// META: script=/html/browsers/browsing-the-web/remote-context-helper/resources/remote-context-helper.js
+// META: script=./resources/test-helper.js
+
+'use strict';
+
+promise_test(async t => {
+  const rcHelper = new RemoteContextHelper();
+  const main = await rcHelper.addWindow({startOn: 'pageshow'});
+  await assertSimplestScriptRuns(main);
+  await assert_equals(
+      await main.executeScript(() => {
+        return executorStartEvent.type;
+      }),
+      'pageshow');
+});
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/addWindow-target.window.js b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/addWindow-target.window.js
new file mode 100644
index 0000000000..3f742048b4
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/addWindow-target.window.js
@@ -0,0 +1,17 @@
+// META: title=RemoteContextHelper addWindow target
+// META: script=/common/dispatcher/dispatcher.js
+// META: script=/common/get-host-info.sub.js
+// META: script=/common/utils.js
+// META: script=/html/browsers/browsing-the-web/remote-context-helper/resources/remote-context-helper.js
+// META: script=./resources/test-helper.js
+
+'use strict';
+
+promise_test(async t => {
+  const rcHelper = new RemoteContextHelper();
+  const name = 'a name';
+  const main = await rcHelper.addWindow(
+      /*extraConfig=*/ null, /*options=*/ {target: name});
+  await assertSimplestScriptRuns(main);
+  await assertWindowNameEquals(main, name);
+});
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/addWorker.window.js b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/addWorker.window.js
new file mode 100644
index 0000000000..d4ba8b0312
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/addWorker.window.js
@@ -0,0 +1,29 @@
+// META: title=RemoteContextWrapper addWorker
+// META: script=/common/dispatcher/dispatcher.js
+// META: script=/common/get-host-info.sub.js
+// META: script=/common/utils.js
+// META: script=/html/browsers/browsing-the-web/remote-context-helper/resources/remote-context-helper.js
+// META: script=./resources/test-helper.js
+
+'use strict';
+
+// This tests that arguments passed to the constructor are respected.
+promise_test(async t => {
+  const rcHelper = new RemoteContextHelper();
+
+  const main = await rcHelper.addWindow();
+
+  const headerName = 'x-wpt-test-header';
+  const headerValue = 'test-escaping()';
+  const worker = await main.addWorker(
+      {
+        scripts: ['/common/get-host-info.sub.js', './resources/test-script.js'],
+        headers: [[headerName, headerValue]],
+      },
+  );
+
+  await assertSimplestScriptRuns(worker);
+  await assertFunctionRuns(worker, () => testFunction(), 'testFunction exists');
+  await assertOriginIsAsExpected(worker, location.origin);
+  await assertHeaderIsAsExpected(worker, headerName, headerValue);
+});
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/constructor.window.js b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/constructor.window.js
new file mode 100644
index 0000000000..dcbb3dabbc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/constructor.window.js
@@ -0,0 +1,38 @@
+// META: title=RemoteContextHelper constructor
+// META: script=/common/dispatcher/dispatcher.js
+// META: script=/common/get-host-info.sub.js
+// META: script=/common/utils.js
+// META: script=/html/browsers/browsing-the-web/remote-context-helper/resources/remote-context-helper.js
+// META: script=./resources/test-helper.js
+
+'use strict';
+
+// This tests that arguments passed to the constructor are respected.
+promise_test(async t => {
+  // Precondition: Test was loaded from the HTTP_ORIGIN.
+  assert_equals(
+      location.origin, get_host_info()['HTTP_ORIGIN'],
+      'test window was loaded on HTTP_ORIGIN');
+
+  const headerName = 'x-wpt-test-header';
+  const headerValue = 'test-escaping()';
+  const rcHelper = new RemoteContextHelper({
+    origin: 'HTTP_REMOTE_ORIGIN',
+    scripts: [
+      '/common/get-host-info.sub.js',
+      './resources/test-script.js',
+    ],
+    headers: [[headerName, headerValue]],
+  });
+
+
+  const main = await rcHelper.addWindow();
+
+  await assertSimplestScriptRuns(main);
+  await assertFunctionRuns(main, () => testFunction(), 'testFunction exists');
+
+  // Verify that the origin is different.
+  await assertOriginIsAsExpected(main, get_host_info()['HTTP_REMOTE_ORIGIN']);
+
+  await assertHeaderIsAsExpected(main, headerName, headerValue);
+});
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/createContext-bad-executorCreator.window.js b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/createContext-bad-executorCreator.window.js
new file mode 100644
index 0000000000..bf24581173
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/createContext-bad-executorCreator.window.js
@@ -0,0 +1,20 @@
+// META: title=RemoteContextHelper createContext with throwing/rejecting executorCreators.
+// META: script=/common/dispatcher/dispatcher.js
+// META: script=/common/get-host-info.sub.js
+// META: script=/common/utils.js
+// META: script=/html/browsers/browsing-the-web/remote-context-helper/resources/remote-context-helper.js
+
+'use strict';
+
+promise_test(async t => {
+  const rcHelper = new RemoteContextHelper();
+
+  const err = new Error('something bad!');
+  promise_rejects_exactly(
+      t, err, rcHelper.createContext({ executorCreator() { throw err; } }),
+      'Sync exception must be rethrown');
+
+  promise_rejects_exactly(
+      t, err, rcHelper.createContext({ executorCreator() { return Promise.reject(err); } }),
+      'Async rejection must be rethrown');
+});
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/getRequestHeaders.window.js b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/getRequestHeaders.window.js
new file mode 100644
index 0000000000..90610e27fb
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/getRequestHeaders.window.js
@@ -0,0 +1,18 @@
+// META: title=RemoteContextHelper with defaults
+// META: script=/common/dispatcher/dispatcher.js
+// META: script=/common/get-host-info.sub.js
+// META: script=/common/utils.js
+// META: script=/html/browsers/browsing-the-web/remote-context-helper/resources/remote-context-helper.js
+// META: script=./resources/test-helper.js
+
+'use strict';
+
+promise_test(async t => {
+  const rcHelper = new RemoteContextHelper();
+  const main = await rcHelper.addWindow();
+
+  const headers = await main.getRequestHeaders();
+
+  assert_equals(headers.constructor, Headers);
+  assert_true(headers.has("user-agent"), "user-agent is present");
+});
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/navigateToNew.window.js b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/navigateToNew.window.js
new file mode 100644
index 0000000000..f7dd3f8325
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/navigateToNew.window.js
@@ -0,0 +1,37 @@
+// META: title=RemoteContextWrapper navigateToNew
+// META: script=/common/dispatcher/dispatcher.js
+// META: script=/common/get-host-info.sub.js
+// META: script=/common/utils.js
+// META: script=/html/browsers/browsing-the-web/remote-context-helper/resources/remote-context-helper.js
+// META: script=./resources/test-helper.js
+
+'use strict';
+
+promise_test(async t => {
+  // Precondition: Test was loaded from the HTTP_ORIGIN.
+  assert_equals(
+      location.origin, get_host_info()['HTTP_ORIGIN'],
+      'test window was loaded on HTTP_ORIGIN');
+
+  const rcHelper = new RemoteContextHelper();
+
+  const main = await rcHelper.addWindow();
+
+  const headerName = 'x-wpt-test-header';
+  const headerValue = 'test-escaping()';
+  const newMain = await main.navigateToNew(
+      {
+        origin: 'HTTP_REMOTE_ORIGIN',
+        scripts: ['/common/get-host-info.sub.js', './resources/test-script.js'],
+        headers: [[headerName, headerValue]],
+      },
+  );
+
+  await assertSimplestScriptRuns(newMain);
+  await assertFunctionRuns(
+      newMain, () => testFunction(), 'testFunction exists');
+
+  const remoteOrigin = get_host_info()['HTTP_REMOTE_ORIGIN'];
+  await assertOriginIsAsExpected(newMain, remoteOrigin);
+  await assertHeaderIsAsExpected(newMain, headerName, headerValue);
+});
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/navigation-bfcache.window.js b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/navigation-bfcache.window.js
new file mode 100644
index 0000000000..1fa90a9064
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/navigation-bfcache.window.js
@@ -0,0 +1,35 @@
+// META: title=RemoteContextHelper navigation using BFCache
+// META: script=/common/dispatcher/dispatcher.js
+// META: script=/common/get-host-info.sub.js
+// META: script=/common/utils.js
+// META: script=/html/browsers/browsing-the-web/remote-context-helper/resources/remote-context-helper.js
+// META: script=./resources/test-helper.js
+
+'use strict';
+
+promise_test(async t => {
+  const rcHelper = new RemoteContextHelper();
+
+  // Open a window with noopener so that BFCache will work.
+  const rc1 = await rcHelper.addWindow(
+      /*config=*/ null, /*options=*/ {features: 'noopener'});
+
+  // Add a pageshow listener to stash the event.
+  await rc1.executeScript(() => {
+    window.addEventListener('pageshow', (event) => {
+      window.pageshowEvent = event;
+    });
+  });
+
+  // Navigate away.
+  const rc2 = await rc1.navigateToNew();
+  await assertSimplestScriptRuns(rc2);
+
+  // Navigate back.
+  await rc2.historyBack();
+
+  // Verify that the document was BFCached.
+  assert_true(await rc1.executeScript(() => {
+    return window.pageshowEvent.persisted;
+  }));
+});
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/navigation-helpers.window.js b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/navigation-helpers.window.js
new file mode 100644
index 0000000000..079e20661e
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/navigation-helpers.window.js
@@ -0,0 +1,28 @@
+// META: title=RemoteContextHelper navigation helpers
+// META: script=/common/dispatcher/dispatcher.js
+// META: script=/common/get-host-info.sub.js
+// META: script=/common/utils.js
+// META: script=/html/browsers/browsing-the-web/remote-context-helper/resources/remote-context-helper.js
+// META: script=./resources/test-helper.js
+// META: timeout=long
+
+'use strict';
+
+promise_test(async t => {
+  const rcHelper = new RemoteContextHelper();
+  const rc1 = await rcHelper.addWindow();
+  await assertSimplestScriptRuns(rc1);
+
+  const rc2 = await rc1.navigateToNew();
+  await assertSimplestScriptRuns(rc2);
+
+  await rc2.historyBack();
+  await assertSimplestScriptRuns(rc1);
+
+  await rc1.historyForward();
+  await assertSimplestScriptRuns(rc2);
+
+  const rc3 = await rc2.navigateToNew();
+  await rc3.historyGo(-2);
+  await assertSimplestScriptRuns(rc1);
+});
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/navigation-same-document.window.js b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/navigation-same-document.window.js
new file mode 100644
index 0000000000..6f637e2b90
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/navigation-same-document.window.js
@@ -0,0 +1,39 @@
+// META: title=RemoteContextHelper navigation using BFCache
+// META: script=/common/dispatcher/dispatcher.js
+// META: script=/common/get-host-info.sub.js
+// META: script=/common/utils.js
+// META: script=/html/browsers/browsing-the-web/remote-context-helper/resources/remote-context-helper.js
+// META: script=./resources/test-helper.js
+
+'use strict';
+
+async function assertLocationIs(remoteContextWrapper, expectedLocation) {
+  assert_equals(
+      await remoteContextWrapper.executeScript(() => {
+        return location.toString();
+      }),
+      expectedLocation, 'verify location');
+}
+
+promise_test(async t => {
+  const rcHelper = new RemoteContextHelper();
+
+  const rc = await rcHelper.addWindow();
+
+  const oldLocation = await rc.executeScript(() => {
+    return location.toString();
+  });
+  const newLocation = oldLocation + '#fragment';
+
+  // Navigate to same document.
+  await rc.navigateTo(newLocation);
+
+  // Verify that the window navigated.
+  await assertLocationIs(rc, newLocation);
+
+  // Navigate back.
+  await rc.historyBack(oldLocation);
+
+  // Verify that the window navigated back and the executor is running.
+  await assertLocationIs(rc, oldLocation);
+});
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/resources/test-helper.js b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/resources/test-helper.js
new file mode 100644
index 0000000000..71cd87e553
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/resources/test-helper.js
@@ -0,0 +1,48 @@
+async function assertSimplestScriptRuns(remoteContextWrapper) {
+  assert_equals(
+      await remoteContextWrapper.executeScript(() => {
+        return 1;
+      }),
+      1, 'simplest script runs');
+}
+
+async function assertFunctionRuns(
+    remoteContextWrapper, functionToRun, expectedReturn) {
+  assert_equals(
+      await remoteContextWrapper.executeScript(functionToRun), expectedReturn,
+      'function runs');
+}
+
+async function assertOriginIsAsExpected(remoteContextWrapper, expectedOrigin) {
+  assert_equals(
+      await remoteContextWrapper.executeScript(() => {
+        return location.origin;
+      }),
+      expectedOrigin, 'verify origin');
+}
+
+async function assertWindowNameEquals(remoteContextWrapper, expectedName) {
+  assert_equals(
+      await remoteContextWrapper.executeScript(() => {
+        return window.name;
+      }),
+      expectedName, 'verify name');
+}
+
+async function assertWindowHasOpenerEquals(remoteContextWrapper, hasParent) {
+  assert_equals(
+      await remoteContextWrapper.executeScript(() => {
+        return !!window.opener;
+      }),
+      hasParent, 'verify opener');
+}
+
+async function assertHeaderIsAsExpected(
+    remoteContextWrapper, headerName, headerValue) {
+  assert_equals(
+      headerValue,
+      await remoteContextWrapper.executeScript(async (headerName) => {
+        const res = await fetch(location);
+        return res.headers.get(headerName);
+      }, [headerName]), 'header is set');
+}
\ No newline at end of file
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/resources/test-script.js b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/resources/test-script.js
new file mode 100644
index 0000000000..d1c02cab29
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/resources/test-script.js
@@ -0,0 +1,3 @@
+function testFunction() {
+  return 'testFunction exists';
+}
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/resources/test-script2.js b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/resources/test-script2.js
new file mode 100644
index 0000000000..f9e72c442b
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper-tests/resources/test-script2.js
@@ -0,0 +1,3 @@
+function testFunction2() {
+  return 'testFunction2 exists';
+}
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper/resources/executor-common.js b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper/resources/executor-common.js
new file mode 100644
index 0000000000..ce9b5f9116
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper/resources/executor-common.js
@@ -0,0 +1,14 @@
+// Functions available by default in the executor.
+
+'use strict';
+
+let executor;
+
+// Expects addScript to be present (window or worker version).
+function addScripts(urls) {
+  return Promise.all(urls.map(addScript));
+}
+
+function startExecutor(uuid) {
+  executor = new Executor(uuid);
+}
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper/resources/executor-window.js b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper/resources/executor-window.js
new file mode 100644
index 0000000000..54df6735c9
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper/resources/executor-window.js
@@ -0,0 +1,67 @@
+// Functions available by default in the executor.
+
+'use strict';
+
+let executorStartEvent = null;
+
+function requestExecutor(uuid, startOn) {
+  if (startOn) {
+    addEventListener(startOn, (e) => {
+      executorStartEvent = e;
+      startExecutor(uuid);
+    });
+  } else {
+    startExecutor(uuid);
+  }
+}
+
+function addScript(url) {
+  const script = document.createElement('script');
+  script.src = url;
+  const promise = new Promise((resolve, reject) => {
+    script.onload = () => resolve(url);
+    script.onerror = (e) => reject(e);
+  });
+  document.body.appendChild(script);
+  return promise;
+}
+
+/**
+ * Suspends the executor and executes the function in `fnString` when it has
+ * suspended. Installs a pageshow handler to resume the executor if the
+ * document is BFCached. Installs a hashchange handler to detect when the
+ * navigation did not change documents.
+ *
+ * This returns nothing because fn is invoke after waiting for the document to
+ * be suspended. If we were to return a promise, the executor could not suspend
+ * until that promise resolved but the promise cannot resolve until the executor
+ * is suspended. This could be avoided by adding support
+ * directly in the dispatcher for tasks suspend immediately after execution.
+ *
+ * @param {string} fnString A stringified function to be executed.
+ * @param {any[]} args The arguments to pass to the function.
+ */
+function executeScriptToNavigate(fnString, args) {
+  // Only one of these listeners should run.
+  const controller = new AbortController();
+  window.addEventListener('pageshow', (event) => {
+    controller.abort();
+    executor.resume();
+  }, {signal: controller.signal, once: true});
+  window.addEventListener('hashchange', (event) => {
+    controller.abort();
+    const oldURLObject = new URL(event.oldURL);
+    const newURLObject = new URL(event.newURL);
+    oldURLObject.hash = '';
+    newURLObject.hash = '';
+    // If only the hash-fragment changed then the navigation was
+    // same-document and we should resume the executor.
+    if (oldURLObject.toString() == newURLObject.toString()) {
+      executor.resume();
+    }
+  }, {signal: controller.signal, once: true});
+
+  executor.suspend(() => {
+    eval(fnString).apply(null, args);
+  });
+}
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper/resources/executor-window.py b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper/resources/executor-window.py
new file mode 100644
index 0000000000..1a660100b9
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper/resources/executor-window.py
@@ -0,0 +1,40 @@
+import html
+import json
+from urllib import parse
+
+def main(request, response):
+  initRequestHeaders = ""
+  for header_name in request.headers.keys():
+    for header_value in request.headers.get_list(header_name):
+      js_name = json.dumps(header_name.lower().decode("utf-8"))
+      js_value = json.dumps(header_value.decode("utf-8"))
+      initRequestHeaders += f"window.__requestHeaders.append({js_name}, {js_value});\n"
+      if (b"status" in request.GET):
+            status = int(request.GET.first(b"status"))
+      else:
+            status = 200
+  query = parse.parse_qs(request.url_parts.query)
+  scripts = []
+  for script in query.get("script", []):
+    scripts.append(f"")
+  scripts_s = "\n".join(scripts)
+
+  uuid = query.get("uuid")[0]
+
+  start_on = query.get("startOn")
+  start_on_s = f"'{start_on[0]}'" if start_on else "null"
+
+  return (status, [("Content-Type", "text/html")], f"""
+
+
+
+
+
+{scripts_s}
+
+
+""")
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper/resources/executor-worker.js b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper/resources/executor-worker.js
new file mode 100644
index 0000000000..0ca136191e
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper/resources/executor-worker.js
@@ -0,0 +1,12 @@
+'use strict';
+
+importScripts('/common/dispatcher/dispatcher.js', './executor-common.js');
+
+function addScript(url) {
+  importScripts(url);
+}
+
+const params = new URLSearchParams(location.search);
+addScripts(params.getAll('script'));
+
+startExecutor(params.get('uuid'));
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper/resources/remote-context-helper.js b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper/resources/remote-context-helper.js
new file mode 100644
index 0000000000..aa24b36e8b
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/remote-context-helper/resources/remote-context-helper.js
@@ -0,0 +1,592 @@
+'use strict';
+
+// Requires:
+// - /common/dispatcher/dispatcher.js
+// - /common/utils.js
+// - /common/get-host-info.sub.js if automagic conversion of origin names to
+// URLs is used.
+
+/**
+ * This provides a more friendly interface to remote contexts in dispatches.js.
+ * The goal is to make it easy to write multi-window/-frame/-worker tests where
+ * the logic is entirely in 1 test file and there is no need to check in any
+ * other file (although it is often helpful to check in files of JS helper
+ * functions that are shared across remote context).
+ *
+ * So for example, to test that history traversal works, we create a new window,
+ * navigate it to a new document, go back and then go forward.
+ *
+ * @example
+ * promise_test(async t => {
+ *   const rcHelper = new RemoteContextHelper();
+ *   const rc1 = await rcHelper.addWindow();
+ *   const rc2 = await rc1.navigateToNew();
+ *   assert_equals(await rc2.executeScript(() => 'here'), 'here', 'rc2 is live');
+ *   rc2.historyBack();
+ *   assert_equals(await rc1.executeScript(() => 'here'), 'here', 'rc1 is live');
+ *   rc1.historyForward();
+ *   assert_equals(await rc2.executeScript(() => 'here'), 'here', 'rc2 is live');
+ * });
+ *
+ * Note on the correspondence between remote contexts and
+ * `RemoteContextWrapper`s. A remote context is entirely determined by its URL.
+ * So navigating away from one and then back again will result in a remote
+ * context that can be controlled by the same `RemoteContextWrapper` instance
+ * before and after navigation. Messages sent to a remote context while it is
+ * destroyed or in BFCache will be queued and processed if that that URL is
+ * navigated back to.
+ *
+ * Navigation:
+ * This framework does not keep track of the history of the frame tree and so it
+ * is up to the test script to keep track of what remote contexts are currently
+ * active and to keep references to the corresponding `RemoteContextWrapper`s.
+ *
+ * Any action that leads to navigation in the remote context must be executed
+ * using
+ * @see RemoteContextWrapper.navigate.
+ */
+
+{
+  const RESOURCES_PATH =
+      '/html/browsers/browsing-the-web/remote-context-helper/resources';
+  const WINDOW_EXECUTOR_PATH = `${RESOURCES_PATH}/executor-window.py`;
+  const WORKER_EXECUTOR_PATH = `${RESOURCES_PATH}/executor-worker.js`;
+
+  /**
+   * Turns a string into an origin. If `origin` is null this will return the
+   * current document's origin. If `origin` contains not '/', this will attempt
+   * to use it as an index in `get_host_info()`. Otherwise returns the input
+   * origin.
+   * @private
+   * @param {string|null} origin The input origin.
+   * @return {string|null} The output origin.
+   * @throws {RangeError} is `origin` cannot be found in
+   *     `get_host_info()`.
+   */
+  function finalizeOrigin(origin) {
+    if (!origin) {
+      return location.origin;
+    }
+    if (!origin.includes('/')) {
+      const origins = get_host_info();
+      if (origin in origins) {
+        return origins[origin];
+      } else {
+        throw new RangeError(
+            `${origin} is not a key in the get_host_info() object`);
+      }
+    }
+    return origin;
+  }
+
+  /**
+   * @private
+   * @param {string} url
+   * @returns {string} Absolute url using `location` as the base.
+   */
+  function makeAbsolute(url) {
+    return new URL(url, location).toString();
+  }
+
+  /**
+   * Represents a configuration for a remote context executor.
+   */
+  class RemoteContextConfig {
+    /**
+     * @param {Object} [options]
+     * @param {string} [options.origin] A URL or a key in `get_host_info()`.
+     *                 @see finalizeOrigin for how origins are handled.
+     * @param {string[]} [options.scripts]  A list of script URLs. The current
+     *     document will be used as the base for relative URLs.
+     * @param {[string, string][]} [options.headers]  A list of pairs of name
+     *     and value. The executor will be served with these headers set.
+     * @param {string} [options.startOn] If supplied, the executor will start
+     *     when this event occurs, e.g. "pageshow",
+     *     (@see window.addEventListener). This only makes sense for
+     *     window-based executors, not worker-based.
+     * @param {string} [options.status] If supplied, the executor will pass
+     *     this value in the "status" parameter to the executor. The default
+     *     executor will default to a status code of 200, if the parameter is
+     *     not supplied.
+     */
+    constructor(
+        {origin, scripts = [], headers = [], startOn, status} = {}) {
+      this.origin = origin;
+      this.scripts = scripts;
+      this.headers = headers;
+      this.startOn = startOn;
+      this.status = status;
+    }
+
+    /**
+     * If `config` is not already a `RemoteContextConfig`, one is constructed
+     * using `config`.
+     * @private
+     * @param {object} [config]
+     * @returns
+     */
+    static ensure(config) {
+      if (!config) {
+        return DEFAULT_CONTEXT_CONFIG;
+      }
+      return new RemoteContextConfig(config);
+    }
+
+    /**
+     * Merges `this` with another `RemoteContextConfig` and to give a new
+     * `RemoteContextConfig`. `origin` is replaced by the other if present,
+     * `headers` and `scripts` are concatenated with `this`'s coming first.
+     * @param {RemoteContextConfig} extraConfig
+     * @returns {RemoteContextConfig}
+     */
+    merged(extraConfig) {
+      let origin = this.origin;
+      if (extraConfig.origin) {
+        origin = extraConfig.origin;
+      }
+      let startOn = this.startOn;
+      if (extraConfig.startOn) {
+        startOn = extraConfig.startOn;
+      }
+      let status = this.status;
+      if (extraConfig.status) {
+        status = extraConfig.status;
+      }
+      const headers = this.headers.concat(extraConfig.headers);
+      const scripts = this.scripts.concat(extraConfig.scripts);
+      return new RemoteContextConfig({
+        origin,
+        headers,
+        scripts,
+        startOn,
+        status
+      });
+    }
+  }
+
+  /**
+   * The default `RemoteContextConfig` to use if none is supplied. It has no
+   * origin, headers or scripts.
+   * @constant {RemoteContextConfig}
+   */
+  const DEFAULT_CONTEXT_CONFIG = new RemoteContextConfig();
+
+  /**
+   * This class represents a configuration for creating remote contexts. This is
+   * the entry-point
+   * for creating remote contexts, providing @see addWindow .
+   */
+  class RemoteContextHelper {
+    /**
+     * @param {RemoteContextConfig|object} config The configuration
+     *     for this remote context.
+     */
+    constructor(config) {
+      this.config = RemoteContextConfig.ensure(config);
+    }
+
+    /**
+     * Creates a new remote context and returns a `RemoteContextWrapper` giving
+     * access to it.
+     * @private
+     * @param {Object} options
+     * @param {(url: string) => Promise} [options.executorCreator] A
+     *     function that takes a URL and causes the browser to navigate some
+     *     window to that URL, e.g. via an iframe or a new window. If this is
+     *     not supplied, then the returned RemoteContextWrapper won't actually
+     *     be communicating with something yet, and something will need to
+     *     navigate to it using its `url` property, before communication can be
+     *     established.
+     * @param {RemoteContextConfig|object} [options.extraConfig] If supplied,
+     *     extra configuration for this remote context to be merged with
+     *     `this`'s existing config. If it's not a `RemoteContextConfig`, it
+     *     will be used to construct a new one.
+     * @returns {Promise}
+     */
+    async createContext({
+      executorCreator,
+      extraConfig,
+      isWorker = false,
+    }) {
+      const config =
+          this.config.merged(RemoteContextConfig.ensure(extraConfig));
+
+      const origin = finalizeOrigin(config.origin);
+      const url = new URL(
+          isWorker ? WORKER_EXECUTOR_PATH : WINDOW_EXECUTOR_PATH, origin);
+
+      // UUID is needed for executor.
+      const uuid = token();
+      url.searchParams.append('uuid', uuid);
+
+      if (config.headers) {
+        addHeaders(url, config.headers);
+      }
+      for (const script of config.scripts) {
+        url.searchParams.append('script', makeAbsolute(script));
+      }
+
+      if (config.startOn) {
+        url.searchParams.append('startOn', config.startOn);
+      }
+
+      if (config.status) {
+        url.searchParams.append('status', config.status);
+      }
+
+      if (executorCreator) {
+        await executorCreator(url.href);
+      }
+
+      return new RemoteContextWrapper(new RemoteContext(uuid), this, url.href);
+    }
+
+    /**
+     * Creates a window with a remote context. @see createContext for
+     * @param {RemoteContextConfig|object} [extraConfig] Will be
+     *     merged with `this`'s config.
+     * @param {Object} [options]
+     * @param {string} [options.target] Passed to `window.open` as the
+     *     2nd argument
+     * @param {string} [options.features] Passed to `window.open` as the
+     *     3rd argument
+     * @returns {Promise}
+     */
+    addWindow(extraConfig, options) {
+      return this.createContext({
+        executorCreator: windowExecutorCreator(options),
+        extraConfig,
+      });
+    }
+  }
+  // Export this class.
+  self.RemoteContextHelper = RemoteContextHelper;
+
+  /**
+   * Attaches header to the URL. See
+   * https://web-platform-tests.org/writing-tests/server-pipes.html#headers
+   * @param {string} url the URL to which headers should be attached.
+   * @param {[[string, string]]} headers a list of pairs of head-name,
+   *     header-value.
+   */
+  function addHeaders(url, headers) {
+    function escape(s) {
+      return s.replace('(', '\\(').replace(')', '\\)');
+    }
+    const formattedHeaders = headers.map((header) => {
+      return `header(${escape(header[0])}, ${escape(header[1])})`;
+    });
+    url.searchParams.append('pipe', formattedHeaders.join('|'));
+  }
+
+  function windowExecutorCreator({target = '_blank', features} = {}) {
+    return url => {
+      window.open(url, target, features);
+    };
+  }
+
+  function elementExecutorCreator(
+      remoteContextWrapper, elementName, attributes) {
+    return url => {
+      return remoteContextWrapper.executeScript((url, elementName, attributes) => {
+        const el = document.createElement(elementName);
+        for (const attribute in attributes) {
+          el.setAttribute(attribute, attributes[attribute]);
+        }
+        el.src = url;
+        document.body.appendChild(el);
+      }, [url, elementName, attributes]);
+    };
+  }
+
+  function iframeSrcdocExecutorCreator(remoteContextWrapper, attributes) {
+    return async (url) => {
+      // `url` points to the content needed to run an `Executor` in the frame.
+      // So we download the content and pass it via the `srcdoc` attribute,
+      // setting the iframe's `src` to `undefined`.
+      attributes['srcdoc'] = await fetch(url).then(r => r.text());
+      elementExecutorCreator(
+          remoteContextWrapper, 'iframe', attributes)(undefined);
+    };
+  }
+
+  function workerExecutorCreator() {
+    return url => {
+      new Worker(url);
+    };
+  }
+
+  function navigateExecutorCreator(remoteContextWrapper) {
+    return url => {
+      return remoteContextWrapper.navigate((url) => {
+        window.location = url;
+      }, [url]);
+    };
+  }
+
+  /**
+   * This class represents a remote context running an executor (a
+   * window/frame/worker that can receive commands). It is the interface for
+   * scripts to control remote contexts.
+   *
+   * Instances are returned when new remote contexts are created (e.g.
+   * `addFrame` or `navigateToNew`).
+   */
+  class RemoteContextWrapper {
+    /**
+     * This should only be constructed by `RemoteContextHelper`.
+     * @private
+     */
+    constructor(context, helper, url) {
+      this.context = context;
+      this.helper = helper;
+      this.url = url;
+    }
+
+    /**
+     * Executes a script in the remote context.
+     * @param {function} fn The script to execute.
+     * @param {any[]} args An array of arguments to pass to the script.
+     * @returns {Promise} The return value of the script (after
+     *     being serialized and deserialized).
+     */
+    async executeScript(fn, args) {
+      return this.context.execute_script(fn, args);
+    }
+
+    /**
+     * Adds a string of HTML to the executor's document.
+     * @param {string} html
+     * @returns {Promise}
+     */
+    async addHTML(html) {
+      return this.executeScript((htmlSource) => {
+        document.body.insertAdjacentHTML('beforebegin', htmlSource);
+      }, [html]);
+    }
+
+    /**
+     * Adds scripts to the executor's document.
+     * @param {string[]} urls A list of URLs. URLs are relative to the current
+     *     document.
+     * @returns {Promise}
+     */
+    async addScripts(urls) {
+      if (!urls) {
+        return [];
+      }
+      return this.executeScript(urls => {
+        return addScripts(urls);
+      }, [urls.map(makeAbsolute)]);
+    }
+
+    /**
+     * Adds an iframe with `src` attribute to the current document.
+     * @param {RemoteContextConfig} [extraConfig]
+     * @param {[string, string][]} [attributes] A list of pairs of strings
+     *     of attribute name and value these will be set on the iframe element
+     *     when added to the document.
+     * @returns {Promise} The remote context.
+     */
+    addIframe(extraConfig, attributes = {}) {
+      return this.helper.createContext({
+        executorCreator: elementExecutorCreator(this, 'iframe', attributes),
+        extraConfig,
+      });
+    }
+
+    /**
+     * Adds an iframe with `srcdoc` attribute to the current document
+     * @param {RemoteContextConfig} [extraConfig]
+     * @param {[string, string][]} [attributes] A list of pairs of strings
+     *     of attribute name and value these will be set on the iframe element
+     *     when added to the document.
+     * @returns {Promise} The remote context.
+     */
+    addIframeSrcdoc(extraConfig, attributes = {}) {
+      return this.helper.createContext({
+        executorCreator: iframeSrcdocExecutorCreator(this, attributes),
+        extraConfig,
+      });
+    }
+
+    /**
+     * Adds a dedicated worker to the current document.
+     * @param {RemoteContextConfig} [extraConfig]
+     * @returns {Promise} The remote context.
+     */
+    addWorker(extraConfig) {
+      return this.helper.createContext({
+        executorCreator: workerExecutorCreator(),
+        extraConfig,
+        isWorker: true,
+      });
+    }
+
+    /**
+     * Gets a `Headers` object containing the request headers that were used
+     * when the browser requested this document.
+     *
+     * Currently, this only works for `RemoteContextHelper`s representing
+     * windows, not workers.
+     * @returns {Promise}
+     */
+    async getRequestHeaders() {
+      // This only works in window environments for now. We could make it work
+      // for workers too; if you have a need, just share or duplicate the code
+      // that's in executor-window.py. Anyway, we explicitly use `window` in
+      // the script so that we get a clear error if you try using it on a
+      // worker.
+
+      // We need to serialize and deserialize the `Headers` object manually.
+      const asNestedArrays = await this.executeScript(() => [...window.__requestHeaders]);
+      return new Headers(asNestedArrays);
+    }
+
+    /**
+     * Executes a script in the remote context that will perform a navigation.
+     * To do this safely, we must suspend the executor and wait for that to
+     * complete before executing. This ensures that all outstanding requests are
+     * completed and no more can start. It also ensures that the executor will
+     * restart if the page goes into BFCache or it was a same-document
+     * navigation. It does not return a value.
+     *
+     * NOTE: We cannot monitor whether and what navigations are happening. The
+     * logic has been made as robust as possible but is not fool-proof.
+     *
+     * Foolproof rule:
+     * - The script must perform exactly one navigation.
+     * - If that navigation is a same-document history traversal, you must
+     * `await` the result of `waitUntilLocationIs`. (Same-document non-traversal
+     * navigations do not need this extra step.)
+     *
+     * More complex rules:
+     * - The script must perform a navigation. If it performs no navigation,
+     *   the remote context will be left in the suspended state.
+     * - If the script performs a direct same-document navigation, it is not
+     * necessary to use this function but it will work as long as it is the only
+     *   navigation performed.
+     * - If the script performs a same-document history navigation, you must
+     * `await` the result of `waitUntilLocationIs`.
+     *
+     * @param {function} fn The script to execute.
+     * @param {any[]} args An array of arguments to pass to the script.
+     * @returns {Promise}
+     */
+    navigate(fn, args) {
+      return this.executeScript((fnText, args) => {
+        executeScriptToNavigate(fnText, args);
+      }, [fn.toString(), args]);
+    }
+
+    /**
+     * Navigates to the given URL, by executing a script in the remote
+     * context that will perform navigation with the `location.href`
+     * setter.
+     *
+     * Be aware that performing a cross-document navigation using this
+     * method will cause this `RemoteContextWrapper` to become dormant,
+     * since the remote context it points to is no longer active and
+     * able to receive messages. You also won't be able to reliably
+     * tell when the navigation finishes; the returned promise will
+     * fulfill when the script finishes running, not when the navigation
+     * is done. As such, this is most useful for testing things like
+     * unload behavior (where it doesn't matter) or prerendering (where
+     * there is already a `RemoteContextWrapper` for the destination).
+     * For other cases, using `navigateToNew()` will likely be better.
+     *
+     * @param {string|URL} url The URL to navigate to.
+     * @returns {Promise}
+     */
+    navigateTo(url) {
+      return this.navigate(url => {
+        location.href = url;
+      }, [url.toString()]);
+    }
+
+    /**
+     * Navigates the context to a new document running an executor.
+     * @param {RemoteContextConfig} [extraConfig]
+     * @returns {Promise} The remote context.
+     */
+    async navigateToNew(extraConfig) {
+      return this.helper.createContext({
+        executorCreator: navigateExecutorCreator(this),
+        extraConfig,
+      });
+    }
+
+    //////////////////////////////////////
+    // Navigation Helpers.
+    //
+    // It is up to the test script to know which remote context will be
+    // navigated to and which `RemoteContextWrapper` should be used after
+    // navigation.
+    //
+    // NOTE: For a same-document history navigation, the caller use `await` a
+    // call to `waitUntilLocationIs` in order to know that the navigation has
+    // completed. For convenience the method below can return the promise to
+    // wait on, if passed the expected location.
+
+    async waitUntilLocationIs(expectedLocation) {
+      return this.executeScript(async (expectedLocation) => {
+        if (location.href === expectedLocation) {
+          return;
+        }
+
+        // Wait until the location updates to the expected one.
+        await new Promise(resolve => {
+          const listener = addEventListener('hashchange', (event) => {
+            if (event.newURL === expectedLocation) {
+              removeEventListener(listener);
+              resolve();
+            }
+          });
+        });
+      }, [expectedLocation]);
+    }
+
+    /**
+     * Performs a history traversal.
+     * @param {integer} n How many steps to traverse. @see history.go
+     * @param {string} [expectedLocation] If supplied will be passed to @see waitUntilLocationIs.
+     * @returns {Promise}
+     */
+    async historyGo(n, expectedLocation) {
+      await this.navigate((n) => {
+        history.go(n);
+      }, [n]);
+      if (expectedLocation) {
+        await this.waitUntilLocationIs(expectedLocation);
+      }
+    }
+
+    /**
+     * Performs a history traversal back.
+     * @param {string} [expectedLocation] If supplied will be passed to @see waitUntilLocationIs.
+     * @returns {Promise}
+     */
+    async historyBack(expectedLocation) {
+      await this.navigate(() => {
+        history.back();
+      });
+      if (expectedLocation) {
+        await this.waitUntilLocationIs(expectedLocation);
+      }
+    }
+
+    /**
+     * Performs a history traversal back.
+     * @param {string} [expectedLocation] If supplied will be passed to @see waitUntilLocationIs.
+     * @returns {Promise}
+     */
+    async historyForward(expectedLocation) {
+      await this.navigate(() => {
+        history.forward();
+      });
+      if (expectedLocation) {
+        await this.waitUntilLocationIs(expectedLocation);
+      }
+    }
+  }
+}
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/resources/has-iframe.html b/testing/web-platform/tests/html/browsers/browsing-the-web/resources/has-iframe.html
new file mode 100644
index 0000000000..e6dfba1011
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/resources/has-iframe.html
@@ -0,0 +1,7 @@
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/resources/helpers.js b/testing/web-platform/tests/html/browsers/browsing-the-web/resources/helpers.js
new file mode 100644
index 0000000000..b19addfadf
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/resources/helpers.js
@@ -0,0 +1,84 @@
+// This file contains general helpers for navigation/history tests. The goal is
+// to make tests more imperative and ordered, instead of requiring lots of
+// nested callbacks and jumping back and forth. However,
+// html/browsers/browsing-the-web/remote-context-helper/resources/remote-context-helper.js
+// might be even better at that, so prefer that when you can.
+//
+// TODO(domenic): consider unifying with
+// overlapping-navigations-and-traversals/resources/helpers.mjs.
+
+window.openWindow = (url, t) => {
+  const w = window.open(url);
+  t?.add_cleanup(() => w.close());
+
+  return new Promise(resolve => {
+    w.addEventListener("load", () => resolve(w), { once: true });
+  });
+};
+
+window.addIframe = (url = "/common/blank.html", doc = document) => {
+  const iframe = doc.createElement("iframe");
+  iframe.src = url;
+  doc.body.append(iframe);
+
+  return new Promise(resolve => {
+    iframe.addEventListener("load", () => resolve(iframe), { once: true });
+  });
+};
+
+window.addSrcdocIframe = async () => {
+  const iframe = document.createElement("iframe");
+  iframe.srcdoc = `
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/001.html b/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/001.html
new file mode 100644
index 0000000000..32599bbc50
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/001.html
@@ -0,0 +1,16 @@
+
+
+Fragment Navigation: Updating document address
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/002.html b/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/002.html
new file mode 100644
index 0000000000..92bfd63415
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/002.html
@@ -0,0 +1,21 @@
+
+
+Fragment Navigation: Updating document address twice
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/003.html b/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/003.html
new file mode 100644
index 0000000000..86d85b9ca6
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/003.html
@@ -0,0 +1,25 @@
+
+
+Fragment Navigation: Updating scroll position
+
+
+
+

+
scroll 1

+
Filler

+
scroll 2

+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/004.html b/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/004.html
new file mode 100644
index 0000000000..c365c6fd29
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/004.html
@@ -0,0 +1,23 @@
+
+
+Fragment Navigation: hashchange event
+
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/005.html b/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/005.html
new file mode 100644
index 0000000000..f0761a64f6
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/005.html
@@ -0,0 +1,23 @@
+
+
+Fragment Navigation: hashchange event
+
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/006.html b/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/006.html
new file mode 100644
index 0000000000..a65b9eb4a2
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/006.html
@@ -0,0 +1,34 @@
+
+
+Fragment Navigation: hashchange event multiple changes old/newURL
+
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/007.html b/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/007.html
new file mode 100644
index 0000000000..0b6fe813ba
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/007.html
@@ -0,0 +1,37 @@
+
+
+Fragment Navigation: hashchange event multiple changes old/newURL
+
+
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/forward-triggers-hashchange.html b/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/forward-triggers-hashchange.html
new file mode 100644
index 0000000000..45f7e38ba3
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/forward-triggers-hashchange.html
@@ -0,0 +1,44 @@
+
+
+Navigating forward after replace() should still trigger hashchange
+
+
+
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/fragment-and-encoding-2.html b/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/fragment-and-encoding-2.html
new file mode 100644
index 0000000000..cd2502ab1c
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/fragment-and-encoding-2.html
@@ -0,0 +1,41 @@
+
+
+Fragment navigation: encoding
+
+
+

+

+

+

+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/fragment-and-encoding.html b/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/fragment-and-encoding.html
new file mode 100644
index 0000000000..21fbd4618d
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/fragment-and-encoding.html
@@ -0,0 +1,50 @@
+
+
+Fragment navigation: encoding
+
+
+

+

+

+

+

+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/navigate-helpers.js b/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/navigate-helpers.js
new file mode 100644
index 0000000000..7a9adeb3d2
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/navigate-helpers.js
@@ -0,0 +1,23 @@
+"use strict";
+
+// Usage examples:
+//   navigateAndWaitForChange(frameWindow, w => w.location.href = "...");
+//   navigateAndWaitForChange(frameWindow, w => w.history.back());
+//   navigateAndWaitForChange(frameWindow, w => w.history.back(), { assumeSuccessAfter: 100 });
+
+window.navigateAndWaitForChange = (w, navigationAction, { assumeSuccessAfter } = {}) => {
+  return new Promise(resolve => {
+    w.addEventListener("hashchange", listener);
+
+    function listener() {
+      w.removeEventListener("hashchange", listener);
+      resolve();
+    }
+
+    if (assumeSuccessAfter !== undefined) {
+      step_timeout(resolve, assumeSuccessAfter);
+    }
+
+    navigationAction(w);
+  });
+};
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/replacement-enabled.html b/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/replacement-enabled.html
new file mode 100644
index 0000000000..b22fbed80f
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/replacement-enabled.html
@@ -0,0 +1,69 @@
+
+
+Navigating to a fragment should not clear forward history
+
+
+
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/scroll-frag-non-utf8-encoded-document.html b/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/scroll-frag-non-utf8-encoded-document.html
new file mode 100644
index 0000000000..7d4e994f0a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/scroll-frag-non-utf8-encoded-document.html
@@ -0,0 +1,21 @@
+
+Fragment Navigation: fragment id should not be found in non UTF8 document
+
+
+
+
+
+

+

+

+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/scroll-frag-percent-encoded.html b/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/scroll-frag-percent-encoded.html
new file mode 100644
index 0000000000..aa179425c5
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/scroll-frag-percent-encoded.html
@@ -0,0 +1,62 @@
+
+Fragment Navigation: fragment id should be percent-decoded
+
+
+
+
+

+

+

+

+

+

+

+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/scroll-position-vertical-lr.html b/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/scroll-position-vertical-lr.html
new file mode 100644
index 0000000000..57d99440e1
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/scroll-position-vertical-lr.html
@@ -0,0 +1,25 @@
+
+
+
+
+Fragment Navigation: Scroll to block start position in vertical-lr writing mode
+
+
+
+
+

+

+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/scroll-position-vertical-rl.html b/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/scroll-position-vertical-rl.html
new file mode 100644
index 0000000000..60a902199a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/scroll-position-vertical-rl.html
@@ -0,0 +1,25 @@
+
+
+
+
+Fragment Navigation: Scroll to block start position in vertical-rl writing mode
+
+
+
+
+

+

+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/scroll-position.html b/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/scroll-position.html
new file mode 100644
index 0000000000..c38d2de83b
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/scroll-position.html
@@ -0,0 +1,25 @@
+
+
+
+
+Fragment Navigation: Scroll to block start position
+
+
+
+
+

+

+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/scroll-to-anchor-name.html b/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/scroll-to-anchor-name.html
new file mode 100644
index 0000000000..060aed11e2
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/scroll-to-anchor-name.html
@@ -0,0 +1,59 @@
+
+Fragment Navigation: scroll to anchor name is lower priority than equal id
+
+
+
+
+

+
+

+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/scroll-to-id-top.html b/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/scroll-to-id-top.html
new file mode 100644
index 0000000000..601d40a2a1
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/scroll-to-id-top.html
@@ -0,0 +1,51 @@
+
+Fragment Navigation: TOP is a valid element id, which overrides navigating to top of the document
+
+
+
+
+

+

+

+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/scroll-to-top.html b/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/scroll-to-top.html
new file mode 100644
index 0000000000..bf62e4cd55
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/scroll-to-fragid/scroll-to-top.html
@@ -0,0 +1,56 @@
+
+Fragment Navigation: When fragid is TOP scroll to the top of the document
+
+
+
+
+

+

+

+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/001.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/001.html
new file mode 100644
index 0000000000..1ef88d3cc1
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/001.html
@@ -0,0 +1,15 @@
+
+document.open in unload
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/002.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/002.html
new file mode 100644
index 0000000000..a4e0b243e2
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/002.html
@@ -0,0 +1,15 @@
+
+document.open in unload
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/003.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/003.html
new file mode 100644
index 0000000000..d0a19e0ddc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/003.html
@@ -0,0 +1,15 @@
+
+document.open in beforeunload with link
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/004.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/004.html
new file mode 100644
index 0000000000..fca926f652
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/004.html
@@ -0,0 +1,15 @@
+
+document.open in beforeunload with button
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/005.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/005.html
new file mode 100644
index 0000000000..c215fb88e7
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/005.html
@@ -0,0 +1,15 @@
+
+document.open in pagehide in iframe
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/base.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/base.html
new file mode 100644
index 0000000000..70c07cba4c
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/base.html
@@ -0,0 +1,14 @@
+
+Base
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/beforeunload-canceling-1.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/beforeunload-canceling-1.html
new file mode 100644
index 0000000000..6ba1e65740
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/beforeunload-canceling-1.html
@@ -0,0 +1,35 @@
+
+
+Support page for beforeunload-canceling.html
+
+
If this goes away, it navigated

+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/beforeunload-canceling.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/beforeunload-canceling.html
new file mode 100644
index 0000000000..29a685fa59
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/beforeunload-canceling.html
@@ -0,0 +1,222 @@
+
+
+beforeunload return value cancelation behavior
+
+
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/beforeunload-on-history-back-1.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/beforeunload-on-history-back-1.html
new file mode 100644
index 0000000000..4403cfa8e9
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/beforeunload-on-history-back-1.html
@@ -0,0 +1,5 @@
+
+001-1
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/beforeunload-on-history-back.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/beforeunload-on-history-back.html
new file mode 100644
index 0000000000..5b0415c422
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/beforeunload-on-history-back.html
@@ -0,0 +1,31 @@
+
+beforeunload event fires on history navigation back
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/beforeunload-on-navigation-of-parent-1.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/beforeunload-on-navigation-of-parent-1.html
new file mode 100644
index 0000000000..4f239dad1e
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/beforeunload-on-navigation-of-parent-1.html
@@ -0,0 +1,2 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/beforeunload-on-navigation-of-parent-2.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/beforeunload-on-navigation-of-parent-2.html
new file mode 100644
index 0000000000..a34b182e70
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/beforeunload-on-navigation-of-parent-2.html
@@ -0,0 +1,4 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/beforeunload-on-navigation-of-parent.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/beforeunload-on-navigation-of-parent.html
new file mode 100644
index 0000000000..96d49567f3
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/beforeunload-on-navigation-of-parent.html
@@ -0,0 +1,31 @@
+
+beforeunload in iframe on navigation of parent
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/beforeunload-sticky-activation-iframe.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/beforeunload-sticky-activation-iframe.html
new file mode 100644
index 0000000000..212a10c005
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/beforeunload-sticky-activation-iframe.html
@@ -0,0 +1,25 @@
+
+
+Beforeunload must be gated behind sticky activation: nested browsing context
+
+
+
+
If you happen to be running this test as a human, then be sure not to interact with any part of the page; that would invalidate the results!
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/beforeunload-sticky-activation-manual.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/beforeunload-sticky-activation-manual.html
new file mode 100644
index 0000000000..55612bbfc4
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/beforeunload-sticky-activation-manual.html
@@ -0,0 +1,17 @@
+
+
+Beforeunload must be gated behind sticky activation: normal top-level browsing context
+
+
This test is manual because we want to test non-popup, non-iframe situations. Sibling files contain automated tests for those situations.
+
+
In three seconds, this document will redirect itself to a new page. The test passes if the redirect succeeds. The test fails if a beforeunload dialog pops up asking for confirmation.
+
+
Be sure not to interact with any part of the page in the meantime. That would invalidate the results.
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/beforeunload-sticky-activation-popup.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/beforeunload-sticky-activation-popup.html
new file mode 100644
index 0000000000..23bf8a440d
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/beforeunload-sticky-activation-popup.html
@@ -0,0 +1,24 @@
+
+
+Beforeunload must be gated behind sticky activation: auxiliary browsing context
+
+
+
+
If you happen to be running this test as a human, then be sure not to interact with any part of the page; that would invalidate the results!
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/beforeunload-synchronous.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/beforeunload-synchronous.html
new file mode 100644
index 0000000000..6806eaf7a3
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/beforeunload-synchronous.html
@@ -0,0 +1,33 @@
+
+
+beforeunload event is emitted synchronously
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/navigation-within-beforeunload-1.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/navigation-within-beforeunload-1.html
new file mode 100644
index 0000000000..b96234fba2
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/navigation-within-beforeunload-1.html
@@ -0,0 +1,10 @@
+
+004-1
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/navigation-within-beforeunload-2.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/navigation-within-beforeunload-2.html
new file mode 100644
index 0000000000..2dceaa6d6a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/navigation-within-beforeunload-2.html
@@ -0,0 +1,4 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/navigation-within-beforeunload.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/navigation-within-beforeunload.html
new file mode 100644
index 0000000000..d6ecf5d52f
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/navigation-within-beforeunload.html
@@ -0,0 +1,29 @@
+
+Triggering navigation from within beforeunload event
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/pagehide-on-history-forward-1.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/pagehide-on-history-forward-1.html
new file mode 100644
index 0000000000..a60c20ed80
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/pagehide-on-history-forward-1.html
@@ -0,0 +1,2 @@
+
+filler text
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/pagehide-on-history-forward.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/pagehide-on-history-forward.html
new file mode 100644
index 0000000000..5e64b5ec66
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/pagehide-on-history-forward.html
@@ -0,0 +1,19 @@
+
+pagehide event fires on history navigation forward
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt-and-unload-script-closeable.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt-and-unload-script-closeable.html
new file mode 100644
index 0000000000..b94789c40f
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt-and-unload-script-closeable.html
@@ -0,0 +1,23 @@
+
+beforeunload and unload events fire after window.close() in script-closeable browsing context
+
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt-and-unload-script-uncloseable-1.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt-and-unload-script-uncloseable-1.html
new file mode 100644
index 0000000000..3a557ce34e
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt-and-unload-script-uncloseable-1.html
@@ -0,0 +1,10 @@
+
+script-uncloseable-1
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt-and-unload-script-uncloseable.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt-and-unload-script-uncloseable.html
new file mode 100644
index 0000000000..f6a17d740b
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt-and-unload-script-uncloseable.html
@@ -0,0 +1,24 @@
+
+beforeunload and unload events do not fire after window.close() in script-uncloseable browsing context
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/001-1.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/001-1.html
new file mode 100644
index 0000000000..b68afc49ec
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/001-1.html
@@ -0,0 +1,10 @@
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/001-2.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/001-2.html
new file mode 100644
index 0000000000..9da0f9395c
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/001-2.html
@@ -0,0 +1 @@
+001-2
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/001.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/001.html
new file mode 100644
index 0000000000..109dcc1393
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/001.html
@@ -0,0 +1,14 @@
+
+beforeunload event order
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/002-1.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/002-1.html
new file mode 100644
index 0000000000..c5f57375da
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/002-1.html
@@ -0,0 +1,7 @@
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/002.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/002.html
new file mode 100644
index 0000000000..d8f4fc60a9
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/002.html
@@ -0,0 +1,20 @@
+
+beforeunload event properties
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/003.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/003.html
new file mode 100644
index 0000000000..5683f1b120
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/003.html
@@ -0,0 +1,20 @@
+
+beforeunload event in child frame for parent navigation
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/004-1.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/004-1.html
new file mode 100644
index 0000000000..a3ca82f520
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/004-1.html
@@ -0,0 +1,28 @@
+
+004-1
+
+// child frame with no onbeforeunload listener. Should leave the parent as unsalvageable.
+// Adding the iframe prevents potential implementation bugs where the the recursive steps of #prompt-to-unload-a-document
+// would overwrite the salvageable state of the parent.
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/004-2.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/004-2.html
new file mode 100644
index 0000000000..1a605b1b3d
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/004-2.html
@@ -0,0 +1,5 @@
+
+004-2
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/004.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/004.html
new file mode 100644
index 0000000000..7076a4dd18
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/004.html
@@ -0,0 +1,29 @@
+
+salvagable state of document after setting beforeunload listener
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/manual-001.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/manual-001.html
new file mode 100644
index 0000000000..3b7ef74b71
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/manual-001.html
@@ -0,0 +1,9 @@
+
+Prompt when beforeunload is canceled
+
+
When clicking the link below, you should get a prompt asking if you want to unload the document

+Click here
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/manual-002.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/manual-002.html
new file mode 100644
index 0000000000..7be8a3301f
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/manual-002.html
@@ -0,0 +1,9 @@
+
+Prompt when beforeunload has returnValue set
+
+
When clicking the link below, you should get a prompt asking if you want to unload the document

+Click here
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/manual-003.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/manual-003.html
new file mode 100644
index 0000000000..ff72b67055
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/manual-003.html
@@ -0,0 +1,11 @@
+
+Prompt when beforeunload is canceled
+
+
When clicking the button below, you should get a prompt asking if you want to unload the document

+

+
+

diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/manual-004.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/manual-004.html
new file mode 100644
index 0000000000..a4d2968922
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/manual-004.html
@@ -0,0 +1,11 @@
+
+Prompt on form submit
+
+
When clicking the button below, you should get a prompt asking if you want to unload the document

+

+
+

diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/manual-005.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/manual-005.html
new file mode 100644
index 0000000000..71ff0a241d
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/manual-005.html
@@ -0,0 +1,22 @@
+
+Event loop pause for beforeunload
+
+
    
+
  • Click on the link below. When the prompt appears the counter at the bottom must stop incrementing.
+
  • Opt not to leave the page. The counter must start incrementing again
+

+
Click here
+

diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/manual-006.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/manual-006.html
new file mode 100644
index 0000000000..dae0340ad9
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/manual-006.html
@@ -0,0 +1,9 @@
+
+Prompt when beforeunload returns string value
+
+
When clicking the link below, you should get a prompt asking if you want to unload the document

+Click here
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/next.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/next.html
new file mode 100644
index 0000000000..38e7cdd5e0
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/prompt/next.html
@@ -0,0 +1,2 @@
+
+
You should have seen a prompt asking you to unload the previous document
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/001-1.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/001-1.html
new file mode 100644
index 0000000000..2a9cab4aa4
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/001-1.html
@@ -0,0 +1,23 @@
+
+
+
+
Follow this link to run the test.
+

diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/001a.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/001a.html
new file mode 100644
index 0000000000..36d4188b9e
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/001a.html
@@ -0,0 +1,7 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/001b.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/001b.html
new file mode 100644
index 0000000000..eaafc371a1
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/001b.html
@@ -0,0 +1,5 @@
+
+
+
Inner frame
\ No newline at end of file
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/002-1.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/002-1.html
new file mode 100644
index 0000000000..017fbb964c
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/002-1.html
@@ -0,0 +1,32 @@
+
+
+
+
+

diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/002a.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/002a.html
new file mode 100644
index 0000000000..51ff3e37b6
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/002a.html
@@ -0,0 +1,7 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/002b.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/002b.html
new file mode 100644
index 0000000000..d08a7a8add
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/002b.html
@@ -0,0 +1,5 @@
+
+
+
Inner frame
\ No newline at end of file
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/003-1.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/003-1.html
new file mode 100644
index 0000000000..b3a4754b85
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/003-1.html
@@ -0,0 +1,23 @@
+
+
+
+
Follow this link to run the test.
+

diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/003a.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/003a.html
new file mode 100644
index 0000000000..5393fa221e
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/003a.html
@@ -0,0 +1,8 @@
+
+
FAIL

+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/003b.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/003b.html
new file mode 100644
index 0000000000..c8f1917b85
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/003b.html
@@ -0,0 +1,5 @@
+
+
+
Inner frame
\ No newline at end of file
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/004-1.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/004-1.html
new file mode 100644
index 0000000000..06aba08af6
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/004-1.html
@@ -0,0 +1,25 @@
+
+
+
+
+

diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/004a.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/004a.html
new file mode 100644
index 0000000000..117e2b94ae
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/004a.html
@@ -0,0 +1,8 @@
+
+
FAIL

+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/004b.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/004b.html
new file mode 100644
index 0000000000..788937a0b0
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/004b.html
@@ -0,0 +1,18 @@
+
+
+
+
Inner frame
\ No newline at end of file
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/005-1.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/005-1.html
new file mode 100644
index 0000000000..7b81a9f115
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/005-1.html
@@ -0,0 +1,13 @@
+
+
+
+
Follow this link to run the test.
+

diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/005a.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/005a.html
new file mode 100644
index 0000000000..5185d3b921
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/005a.html
@@ -0,0 +1,8 @@
+
+
FAIL

+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/005b.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/005b.html
new file mode 100644
index 0000000000..476e8e38c4
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/005b.html
@@ -0,0 +1,17 @@
+
+
+
+
Inner frame
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/beforeunload-sticky-destination.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/beforeunload-sticky-destination.html
new file mode 100644
index 0000000000..2edcf1a43b
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/beforeunload-sticky-destination.html
@@ -0,0 +1,13 @@
+
+
+Beforeunload must be gated behind sticky activation: destination page
+
+
If you reached this page without clicking through a confirmation dialog, then the test has passed!
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/beforeunload-sticky-start.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/beforeunload-sticky-start.html
new file mode 100644
index 0000000000..37109feafe
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/support/beforeunload-sticky-start.html
@@ -0,0 +1,10 @@
+
+
+Beforeunload must be gated behind sticky activation: start page
+
+
This page will immediately navigate. If a beforeunload dialog pops up, the test fails.

+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/001-1.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/001-1.html
new file mode 100644
index 0000000000..74ba43954b
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/001-1.html
@@ -0,0 +1,4 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/001-2.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/001-2.html
new file mode 100644
index 0000000000..90e28ab7fb
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/001-2.html
@@ -0,0 +1,2 @@
+
+Filler
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/001.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/001.html
new file mode 100644
index 0000000000..444a2770c7
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/001.html
@@ -0,0 +1,25 @@
+
+pagehide event on unload
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/002-1.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/002-1.html
new file mode 100644
index 0000000000..fd8e2b7262
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/002-1.html
@@ -0,0 +1,4 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/002.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/002.html
new file mode 100644
index 0000000000..d36011286c
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/002.html
@@ -0,0 +1,36 @@
+
+pagehide event properties
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/003-1.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/003-1.html
new file mode 100644
index 0000000000..9838c79456
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/003-1.html
@@ -0,0 +1,4 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/003.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/003.html
new file mode 100644
index 0000000000..97821be484
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/003.html
@@ -0,0 +1,33 @@
+
+unload event properties
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/004-1.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/004-1.html
new file mode 100644
index 0000000000..5d0497556b
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/004-1.html
@@ -0,0 +1,5 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/004.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/004.html
new file mode 100644
index 0000000000..301baa3b8e
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/004.html
@@ -0,0 +1,28 @@
+
+pagehide / unload event order
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/006-1.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/006-1.html
new file mode 100644
index 0000000000..bc2e10bdc3
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/006-1.html
@@ -0,0 +1,23 @@
+
+006-1
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/006-2.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/006-2.html
new file mode 100644
index 0000000000..52365e55d8
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/006-2.html
@@ -0,0 +1,5 @@
+
+006-2
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/006.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/006.html
new file mode 100644
index 0000000000..c9e4d68a10
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/006.html
@@ -0,0 +1,18 @@
+
+salvagable state of document after setting pagehide listener
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/007-1.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/007-1.html
new file mode 100644
index 0000000000..ed19f4498a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/007-1.html
@@ -0,0 +1,21 @@
+
+007-1
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/007-2.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/007-2.html
new file mode 100644
index 0000000000..f74cd1e67e
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/007-2.html
@@ -0,0 +1,5 @@
+
+007-2
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/007.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/007.html
new file mode 100644
index 0000000000..4a2fed5fac
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/007.html
@@ -0,0 +1,28 @@
+
+salvagable state of document after setting unload listener
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/008-1.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/008-1.html
new file mode 100644
index 0000000000..29de29c911
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/008-1.html
@@ -0,0 +1,4 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/008.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/008.html
new file mode 100644
index 0000000000..015507d817
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/008.html
@@ -0,0 +1,16 @@
+
+pagehide IDL attribute
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/009-1.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/009-1.html
new file mode 100644
index 0000000000..d69a05914a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/009-1.html
@@ -0,0 +1,4 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/009.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/009.html
new file mode 100644
index 0000000000..0e93e04701
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/009.html
@@ -0,0 +1,16 @@
+
+unload IDL attribute
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/pagehide-manual-1.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/pagehide-manual-1.html
new file mode 100644
index 0000000000..3da0a0de3e
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/pagehide-manual-1.html
@@ -0,0 +1,2 @@
+
+
Now go back. PASS should be displayed after a short pause
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/pagehide-manual.html b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/pagehide-manual.html
new file mode 100644
index 0000000000..ba34c3087f
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/pagehide-manual.html
@@ -0,0 +1,5 @@
+
+Document salvagable state after setting pagehide handler
+
+
Click the link below then navigate back to this page. Shortly after returning you should see the text "PASS"

+
Click here
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/unload-main-frame-cross-origin.window.js b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/unload-main-frame-cross-origin.window.js
new file mode 100644
index 0000000000..65b4e533f6
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/unload-main-frame-cross-origin.window.js
@@ -0,0 +1,34 @@
+// META: title=Unload runs in main frame when navigating cross-origin.
+// META: script=/common/dispatcher/dispatcher.js
+// META: script=/common/get-host-info.sub.js
+// META: script=/common/utils.js
+// META: script=/html/browsers/browsing-the-web/remote-context-helper/resources/remote-context-helper.js
+
+promise_test(async t => {
+  const rcHelper = new RemoteContextHelper();
+
+  const rc1 = await rcHelper.addWindow();
+
+  t.add_cleanup(() => localStorage.removeItem('unload'));
+
+  // Initialize storage and add "unload" event handler.
+  await rc1.executeScript(() => {
+    localStorage.setItem('unload', 'not yet');
+    addEventListener('unload', () => {
+      localStorage.setItem('unload', 'ran');
+    });
+  });
+
+  // Navigate away.
+  const rc2 = await rc1.navigateToNew(
+      {extraRemoteContextConfig: {origin: 'HTTP_REMOTE_ORIGIN'}});
+
+  // Navigate back.
+  await rc2.historyBack();
+
+  // Test that the unload handler wrote to storage.
+  // Running it in the remote context after going back should ensure that the
+  // navigation (and therefore the unload handler) has completed.
+  assert_equals(
+      await rc1.executeScript(() => localStorage.getItem('unload')), 'ran');
+});
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/unload-main-frame-same-origin.window.js b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/unload-main-frame-same-origin.window.js
new file mode 100644
index 0000000000..5a95455c4c
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/unloading-documents/unload/unload-main-frame-same-origin.window.js
@@ -0,0 +1,33 @@
+// META: title=Unload runs in main frame when navigating same-origin.
+// META: script=/common/dispatcher/dispatcher.js
+// META: script=/common/get-host-info.sub.js
+// META: script=/common/utils.js
+// META: script=/html/browsers/browsing-the-web/remote-context-helper/resources/remote-context-helper.js
+
+promise_test(async t => {
+  const rcHelper = new RemoteContextHelper();
+
+  const rc1 = await rcHelper.addWindow();
+
+  t.add_cleanup(() => localStorage.removeItem('unload'));
+
+  // Initialize storage and add "unload" event handler.
+  await rc1.executeScript(() => {
+    localStorage.setItem('unload', 'not yet');
+    addEventListener('unload', () => {
+      localStorage.setItem('unload', 'ran');
+    });
+  });
+
+  // Navigate away.
+  const rc2 = await rc1.navigateToNew();
+
+  // Navigate back.
+  await rc2.historyBack();
+
+  // Test that the unload handler wrote to storage.
+  // Running it in the remote context after going back should ensure that the
+  // navigation (and therefore the unload handler) has completed.
+  assert_equals(
+      await rc1.executeScript(() => localStorage.getItem('unload')), 'ran');
+});
diff --git a/testing/web-platform/tests/html/browsers/history/joint-session-history/joint-session-history-child1.html b/testing/web-platform/tests/html/browsers/history/joint-session-history/joint-session-history-child1.html
new file mode 100644
index 0000000000..22bb0b2980
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/joint-session-history/joint-session-history-child1.html
@@ -0,0 +1,18 @@
+
+  Child1.
+  
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/joint-session-history/joint-session-history-child2.html b/testing/web-platform/tests/html/browsers/history/joint-session-history/joint-session-history-child2.html
new file mode 100644
index 0000000000..24b4695166
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/joint-session-history/joint-session-history-child2.html
@@ -0,0 +1,5 @@
+Child 2.
+
diff --git a/testing/web-platform/tests/html/browsers/history/joint-session-history/joint-session-history-filler.html b/testing/web-platform/tests/html/browsers/history/joint-session-history/joint-session-history-filler.html
new file mode 100644
index 0000000000..b6d47c310b
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/joint-session-history/joint-session-history-filler.html
@@ -0,0 +1 @@
+Filler
diff --git a/testing/web-platform/tests/html/browsers/history/joint-session-history/joint-session-history-grandchild1.html b/testing/web-platform/tests/html/browsers/history/joint-session-history/joint-session-history-grandchild1.html
new file mode 100644
index 0000000000..d05e152425
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/joint-session-history/joint-session-history-grandchild1.html
@@ -0,0 +1,8 @@
+
+  Grandchild1.
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/joint-session-history/joint-session-history-grandchild2.html b/testing/web-platform/tests/html/browsers/history/joint-session-history/joint-session-history-grandchild2.html
new file mode 100644
index 0000000000..b5c81e1fca
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/joint-session-history/joint-session-history-grandchild2.html
@@ -0,0 +1,5 @@
+Grandchild2.
+
diff --git a/testing/web-platform/tests/html/browsers/history/joint-session-history/joint-session-history-iframe-state.html b/testing/web-platform/tests/html/browsers/history/joint-session-history/joint-session-history-iframe-state.html
new file mode 100644
index 0000000000..ffa64c0b35
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/joint-session-history/joint-session-history-iframe-state.html
@@ -0,0 +1,41 @@
+
+
+Joint session history should not override parent's state.
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/joint-session-history/joint-session-history-only-fully-active.html b/testing/web-platform/tests/html/browsers/history/joint-session-history/joint-session-history-only-fully-active.html
new file mode 100644
index 0000000000..c42d160a21
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/joint-session-history/joint-session-history-only-fully-active.html
@@ -0,0 +1,30 @@
+
+
+Do only fully active documents count for session history?
+
+
+
+  
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/joint-session-history/joint-session-history-remove-iframe.html b/testing/web-platform/tests/html/browsers/history/joint-session-history/joint-session-history-remove-iframe.html
new file mode 100644
index 0000000000..ee7aa368af
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/joint-session-history/joint-session-history-remove-iframe.html
@@ -0,0 +1,24 @@
+
+
+Joint session history length does not include entries from a removed iframe.
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/001.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/001.html
new file mode 100644
index 0000000000..16cb834c78
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/001.html
@@ -0,0 +1,339 @@
+
+
+    
+        history.pushState tests
+        
+        
+        
+    
+    
+
+        
Enable JavaScript and reload

+        
WARNING: This test should always be loaded in a new tab/window, to avoid browsers attempting to recover the state of frames, and history length. Do not reload the test.

+        
Running test...

+        

+        

+        

+        

+
+    
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/002.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/002.html
new file mode 100644
index 0000000000..8bce7e72ff
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/002.html
@@ -0,0 +1,318 @@
+
+
+    
+        history.replaceState tests
+        
+        
+        
+    
+    
+
+        
+        
WARNING: This test should always be loaded in a new tab/window, to avoid browsers attempting to recover the state of frames, and history length. Do not reload the test.

+        
Running test...

+        

+        

+        

+        

+
+    
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/004.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/004.html
new file mode 100644
index 0000000000..e69889724f
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/004.html
@@ -0,0 +1,62 @@
+
+
+  
+    Final history position for history.go should be calculated when executing the task
+    
+    
+    
+  
+  
+
+    
+    

+
+  
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/005.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/005.html
new file mode 100644
index 0000000000..2152e85a3e
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/005.html
@@ -0,0 +1,47 @@
+
+
+  
+    Popstate event listener registration
+    
+    
+    
+  
+  
+
+    
+    

+
+  
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/006.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/006.html
new file mode 100644
index 0000000000..442b6f8f1e
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/006.html
@@ -0,0 +1,53 @@
+
+
+  
+    Firing popstate after onload, even if there is no pushed/replaced state
+    
+    
+    
+  
+  
+
+    
+    

+
+  
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/007.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/007.html
new file mode 100644
index 0000000000..decb197624
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/007.html
@@ -0,0 +1,66 @@
+
+
+  
+    Firing popstate after onload with pushed state
+                
+    
+    
+  
+  
+
+    
+    
It looks like the browser stopped loading the page when encountering a .go(-1) command pointing to a pushed state. This will break the tests.

+    
+
+  
+  
+  
+  
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/008.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/008.html
new file mode 100644
index 0000000000..c8071e3156
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/008.html
@@ -0,0 +1,40 @@
+
+
+
+
+
+  
+    history.pushState/replaceState resolving
+    
+    
+  
+  
+
+    

+    
+    

+    
+
+  
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/008.js b/testing/web-platform/tests/html/browsers/history/the-history-interface/008.js
new file mode 100644
index 0000000000..96a1fe5d4a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/008.js
@@ -0,0 +1,11 @@
+var beforehref = location.href;
+
+test(function () {
+  history.pushState('','','/testing_ignore_me_404');
+  assert_equals(location.href,beforehref.replace(/^(\w*:\/\/[^\/]*\/)[\w\W]*$/,'$1testing_ignore_me_404'));
+}, 'history.pushState URL resolving should be done relative to the document, not the script');
+
+test(function () {
+  history.replaceState('','','/testing_ignore_me_404_2');
+  assert_equals(location.href,beforehref.replace(/^(\w*:\/\/[^\/]*\/)[\w\W]*$/,'$1testing_ignore_me_404_2'));
+}, 'history.replaceState URL resolving should be done relative to the document, not the script');
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/009-1.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/009-1.html
new file mode 100644
index 0000000000..00b72e8ec6
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/009-1.html
@@ -0,0 +1,20 @@
+
+
+  
+    history.pushState/replaceState and referer headers
+  
+  
+
+    
+    

+    
+
+  
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/009-3.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/009-3.html
new file mode 100644
index 0000000000..e58b8fa5e7
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/009-3.html
@@ -0,0 +1,28 @@
+
+
+        
+                history.pushState/replaceState and referer headers
+        
+        
+
+                
+                

+                
+
+        
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/009-5.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/009-5.html
new file mode 100644
index 0000000000..068a089af4
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/009-5.html
@@ -0,0 +1,23 @@
+
+
+        
+                history.pushState/replaceState and referer headers
+        
+        
+
+                
+                

+                
+
+        
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/009.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/009.html
new file mode 100644
index 0000000000..c1ae0bbe03
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/009.html
@@ -0,0 +1,22 @@
+
+
+  
+    history.pushState/replaceState and referer headers
+    
+    
+  
+  
+
+    
+    

+    
+
+  
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/010-1.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/010-1.html
new file mode 100644
index 0000000000..683397745c
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/010-1.html
@@ -0,0 +1,16 @@
+
+
+  
+    history.pushState/replaceState and referer headers (before onload)
+  
+  
+
+    
+    

+    
+
+  
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/010-3.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/010-3.html
new file mode 100644
index 0000000000..b80f56c3dd
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/010-3.html
@@ -0,0 +1,24 @@
+
+
+        
+                history.pushState/replaceState and referer headers (before onload)
+        
+        
+
+                
+                

+                
+
+        
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/010-5.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/010-5.html
new file mode 100644
index 0000000000..d150449eb2
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/010-5.html
@@ -0,0 +1,23 @@
+
+
+        
+                history.pushState/replaceState and referer headers (before onload)
+        
+        
+
+                
+                

+                
+
+        
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/010.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/010.html
new file mode 100644
index 0000000000..ca109a744b
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/010.html
@@ -0,0 +1,22 @@
+
+
+  
+    history.pushState/replaceState and referer headers (before onload)
+    
+    
+  
+  
+
+    
+    

+    
+
+  
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/011.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/011.html
new file mode 100644
index 0000000000..4043aff7fd
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/011.html
@@ -0,0 +1,32 @@
+
+
+  
+    history.pushState before onload
+    
+    
+  
+  
+
+    
+    

+    
+
+  
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/012.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/012.html
new file mode 100644
index 0000000000..f5e6251671
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/012.html
@@ -0,0 +1,32 @@
+
+
+  
+    history.replaceState before onload
+    
+    
+  
+  
+
+    
+    

+    
+
+  
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/blank-new.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/blank-new.html
new file mode 100644
index 0000000000..2a545af0ed
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/blank-new.html
@@ -0,0 +1,5 @@
+
+
+  New page
+
+This is a new page.
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/blank-old.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/blank-old.html
new file mode 100644
index 0000000000..a77c00fcc6
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/blank-old.html
@@ -0,0 +1,5 @@
+
+
+  Old page
+
+This is an old page.
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/blank.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/blank.html
new file mode 100644
index 0000000000..89c8724c09
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/blank.html
@@ -0,0 +1,8 @@
+
+
+  
+    Dummy page 1
+  
+  
+  
+
\ No newline at end of file
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/blank2.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/blank2.html
new file mode 100644
index 0000000000..f79982e328
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/blank2.html
@@ -0,0 +1,13 @@
+
+
+  
+    Dummy page 2
+  
+  
+    
+  
+
\ No newline at end of file
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/blank3.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/blank3.html
new file mode 100644
index 0000000000..2a8989f272
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/blank3.html
@@ -0,0 +1,11 @@
+
+
+  
+    Dummy page 3
+    
+  
+  
+  
+
\ No newline at end of file
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/combination_history_001.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/combination_history_001.html
new file mode 100644
index 0000000000..21ba22f6fe
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/combination_history_001.html
@@ -0,0 +1,20 @@
+
+
+  
+    combination_history_001(Combine pushState and replaceSate methods.)
+    
+    
+  
+  
+    

+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/combination_history_002.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/combination_history_002.html
new file mode 100644
index 0000000000..29e82f51be
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/combination_history_002.html
@@ -0,0 +1,22 @@
+
+
+  
+    combination_history_002(After calling of pushState method, check length.)
+    
+    
+  
+  
+    

+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/combination_history_003.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/combination_history_003.html
new file mode 100644
index 0000000000..7467d9b294
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/combination_history_003.html
@@ -0,0 +1,26 @@
+
+
+  
+    combination_history_003(After calling of pushState and replaceState methods, check length.)
+    
+    
+  
+  
+    

+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/combination_history_004.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/combination_history_004.html
new file mode 100644
index 0000000000..4e38b56205
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/combination_history_004.html
@@ -0,0 +1,29 @@
+
+
+  
+    combination_history_004(After calling of back method, check length.)
+    
+    
+  
+  
+    

+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/combination_history_005.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/combination_history_005.html
new file mode 100644
index 0000000000..4487678015
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/combination_history_005.html
@@ -0,0 +1,34 @@
+
+
+  
+    combination_history_005(After calling of forward method, check length.)
+    
+    
+  
+  
+    

+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/combination_history_006.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/combination_history_006.html
new file mode 100644
index 0000000000..305f593c09
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/combination_history_006.html
@@ -0,0 +1,30 @@
+
+
+  
+    combination_history_006(After calling of go method, check length.)
+    
+    
+  
+  
+    

+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/combination_history_007.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/combination_history_007.html
new file mode 100644
index 0000000000..cec9ea0981
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/combination_history_007.html
@@ -0,0 +1,32 @@
+
+
+  
+    combination_history_007(After calling of back and pushState method, check length.)
+    
+    
+  
+  
+    

+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/history-associated-with-document.window.js b/testing/web-platform/tests/html/browsers/history/the-history-interface/history-associated-with-document.window.js
new file mode 100644
index 0000000000..94c1b2cf6b
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/history-associated-with-document.window.js
@@ -0,0 +1,6 @@
+// META: title=the History object must be associated with the Document object, not the Window object
+// META: script=/common/object-association.js
+
+// See https://github.com/whatwg/html/issues/2566.
+
+testIsPerDocument("history");
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/history-state-after-bfcache.window.js b/testing/web-platform/tests/html/browsers/history/the-history-interface/history-state-after-bfcache.window.js
new file mode 100644
index 0000000000..5f04890a72
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/history-state-after-bfcache.window.js
@@ -0,0 +1,43 @@
+// META: title=Navigating back to a bfcached page does not reset history.state
+// META: script=/common/dispatcher/dispatcher.js
+// META: script=/common/utils.js
+// META: script=/html/browsers/browsing-the-web/remote-context-helper/resources/remote-context-helper.js
+
+// See https://github.com/whatwg/html/issues/6652.
+
+'use strict';
+
+promise_test(async t => {
+  const rcHelper = new RemoteContextHelper();
+
+  // Open a window with noopener so that BFCache will work.
+  const rc = await rcHelper.addWindow(null, { features: "noopener" });
+
+  // Add a pageshow listener to stash the event, and set history.state using replaceState().
+  await rc.executeScript(() => {
+    window.addEventListener('pageshow', (event) => {
+      window.pageshowEvent = event;
+    });
+
+    history.replaceState({ foo: 'bar' }, '', '');
+    window.stashedHistoryState = history.state;
+  });
+
+  const rc2 = await rc.navigateToNew();
+  await rc2.historyBack();
+
+  assert_implements_optional(
+    await rc.executeScript(() => window.pageshowEvent.persisted),
+    'precondition: document was bfcached'
+  );
+
+  assert_equals(
+    await rc.executeScript(() => history.state.foo),
+    'bar',
+    'history.state was restored correctly'
+  );
+
+  assert_true(
+    await rc.executeScript(() => window.stashedHistoryState === history.state),
+    'history.state did not get serialized and deserialized');
+});
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/history.js b/testing/web-platform/tests/html/browsers/history/the-history-interface/history.js
new file mode 100644
index 0000000000..bb5ee6dde0
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/history.js
@@ -0,0 +1,35 @@
+function parse_query() {
+    var query = location.search.slice(1);
+    var vars = query.split("&");
+    var fields = {};
+    vars.forEach(
+        function (x) {
+            var split = x.split("=");
+            return fields[split[0]] = split.slice(1).join("=");
+        });
+    return fields;
+}
+
+var query_parts = parse_query();
+var id = "id" in query_parts ? parseInt(query_parts.id) : 1;
+var urls_to_load = query_parts.urls.split(",");
+
+document.write(id);
+
+onunload = function() {};
+
+function queue_next() {
+    t = opener.t;
+    setTimeout(t.step_func(
+        function() {
+//            opener.assert_equals(history.length, id);
+            if (urls_to_load[0]) {
+                var next_page = urls_to_load[0];
+                (next_page.indexOf("?") > -1) ? (next_page += "&") : (next_page += "?");
+                next_page += "urls=" + urls_to_load.slice(1).join(",");
+                next_page += "&id=" + ++id;
+                location = next_page;
+            }
+        }
+    ), 100);
+}
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/history_back-1.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_back-1.html
new file mode 100644
index 0000000000..5487786fc0
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_back-1.html
@@ -0,0 +1,15 @@
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/history_back.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_back.html
new file mode 100644
index 0000000000..042da4e61b
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_back.html
@@ -0,0 +1,27 @@
+
+
+  
+    history_back
+    
+    
+  
+  
+    

+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/history_back_1.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_back_1.html
new file mode 100644
index 0000000000..0af3206643
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_back_1.html
@@ -0,0 +1,26 @@
+
+history.back() with session history
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/history_back_cross_realm_method.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_back_cross_realm_method.html
new file mode 100644
index 0000000000..47937ef583
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_back_cross_realm_method.html
@@ -0,0 +1,22 @@
+
+
+history.back() uses this's associated document's browsing context to determine if navigation is allowed
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/history_entry.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_entry.html
new file mode 100644
index 0000000000..308371c57d
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_entry.html
@@ -0,0 +1,11 @@
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/history_forward-1.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_forward-1.html
new file mode 100644
index 0000000000..1bf7d6ee3b
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_forward-1.html
@@ -0,0 +1,14 @@
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/history_forward-2.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_forward-2.html
new file mode 100644
index 0000000000..cf8a8d20cd
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_forward-2.html
@@ -0,0 +1,15 @@
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/history_forward.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_forward.html
new file mode 100644
index 0000000000..6c37f25215
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_forward.html
@@ -0,0 +1,32 @@
+
+
+  
+    history_forward
+    
+    
+  
+  
+    

+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/history_forward_1.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_forward_1.html
new file mode 100644
index 0000000000..7817649f3a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_forward_1.html
@@ -0,0 +1,26 @@
+
+history.forward() with session history
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/history_forward_cross_realm_method.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_forward_cross_realm_method.html
new file mode 100644
index 0000000000..7456099b8f
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_forward_cross_realm_method.html
@@ -0,0 +1,28 @@
+
+
+history.forward() uses this's associated document's browsing context to determine if navigation is allowed
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/history_go_cross_realm_method.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_go_cross_realm_method.html
new file mode 100644
index 0000000000..d8852b9f6f
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_go_cross_realm_method.html
@@ -0,0 +1,23 @@
+
+
+history.go() uses this's associated document's browsing context to determine if navigation is allowed
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/history_go_minus.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_go_minus.html
new file mode 100644
index 0000000000..b8fe75573d
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_go_minus.html
@@ -0,0 +1,27 @@
+
+
+  
+    history_go_minus
+    
+    
+  
+  
+    

+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/history_go_no_argument-1.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_go_no_argument-1.html
new file mode 100644
index 0000000000..6a2212f34b
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_go_no_argument-1.html
@@ -0,0 +1,17 @@
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/history_go_no_argument.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_go_no_argument.html
new file mode 100644
index 0000000000..11f41614bd
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_go_no_argument.html
@@ -0,0 +1,27 @@
+
+history.go()
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/history_go_plus.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_go_plus.html
new file mode 100644
index 0000000000..74d4c588ca
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_go_plus.html
@@ -0,0 +1,33 @@
+
+
+  
+    history_go_plus
+    
+    
+  
+  
+    

+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/history_go_to_uri-1.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_go_to_uri-1.html
new file mode 100644
index 0000000000..49249ff000
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_go_to_uri-1.html
@@ -0,0 +1,22 @@
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/history_go_to_uri.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_go_to_uri.html
new file mode 100644
index 0000000000..e0a891a5a2
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_go_to_uri.html
@@ -0,0 +1,30 @@
+
+history.go() negative tests
+
+
+
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/history_go_undefined-1.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_go_undefined-1.html
new file mode 100644
index 0000000000..1bf7d6ee3b
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_go_undefined-1.html
@@ -0,0 +1,14 @@
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/history_go_undefined.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_go_undefined.html
new file mode 100644
index 0000000000..ddc0f588b5
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_go_undefined.html
@@ -0,0 +1,26 @@
+
+history.forward() with session history
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/history_go_zero-1.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_go_zero-1.html
new file mode 100644
index 0000000000..17e520a810
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_go_zero-1.html
@@ -0,0 +1,17 @@
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/history_go_zero.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_go_zero.html
new file mode 100644
index 0000000000..b071b580c3
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_go_zero.html
@@ -0,0 +1,27 @@
+
+history.go(0)
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/history_go_zero_which_document.window.js b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_go_zero_which_document.window.js
new file mode 100644
index 0000000000..f697783f3e
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_go_zero_which_document.window.js
@@ -0,0 +1,27 @@
+// META: title=history.go(0) on an iframe must reload the iframe's document, not the parent document
+// META: script=/common/dispatcher/dispatcher.js
+// META: script=/common/utils.js
+// META: script=/html/browsers/browsing-the-web/remote-context-helper/resources/remote-context-helper.js
+
+promise_test(async () => {
+  const rcHelper = new RemoteContextHelper();
+  const main = await rcHelper.addWindow();
+  await main.addIframe();
+
+  await main.executeScript(() => {
+    window.didNotGetReloaded = true;
+
+    const iframe = document.querySelector("iframe");
+
+    // This goes beyond the original test case in https://github.com/whatwg/html/issues/2436, and
+    // tests where current realm != relevant realm. The spec says to use relevant realm so the
+    // result is still, iframe must reload, not parent.
+    History.prototype.go.call(iframe.contentWindow.history, 0);
+
+    return new Promise(resolve => {
+      iframe.addEventListener("load", resolve);
+    });
+  });
+
+  assert_true(await main.executeScript(() => window.didNotGetReloaded));
+});
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/history_properties_only_fully_active.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_properties_only_fully_active.html
new file mode 100644
index 0000000000..2b2c308526
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_properties_only_fully_active.html
@@ -0,0 +1,23 @@
+
+history properties should throw SecurityError when not in a fully active Document
+
+
+
+  
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/history_pushstate.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_pushstate.html
new file mode 100644
index 0000000000..5180a3f6e5
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_pushstate.html
@@ -0,0 +1,19 @@
+
+
+  
+    history_pushState
+    
+    
+  
+  
+    

+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/history_pushstate_err.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_pushstate_err.html
new file mode 100644
index 0000000000..6fa0a8589d
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_pushstate_err.html
@@ -0,0 +1,18 @@
+
+
+  
+    history_pushState SECURITY_ERR
+    
+    
+  
+  
+    

+    
+ 
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/history_pushstate_nooptionalparam.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_pushstate_nooptionalparam.html
new file mode 100644
index 0000000000..8e4b049a19
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_pushstate_nooptionalparam.html
@@ -0,0 +1,20 @@
+
+
+  
+    history_pushState_NoOptionalParam
+    
+    
+  
+  
+    

+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/history_pushstate_url.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_pushstate_url.html
new file mode 100644
index 0000000000..cfbca35bfd
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_pushstate_url.html
@@ -0,0 +1,24 @@
+
+
+
+
+History pushState sets the url
+
+
+
+
+

+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/history_pushstate_url_rewriting.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_pushstate_url_rewriting.html
new file mode 100644
index 0000000000..03c2afe8ea
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_pushstate_url_rewriting.html
@@ -0,0 +1,176 @@
+
+
+URL rewriting allowed/disallowed for history.pushState()
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/history_replacestate.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_replacestate.html
new file mode 100644
index 0000000000..794c2f3713
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_replacestate.html
@@ -0,0 +1,20 @@
+
+
+  
+    history_replaceState
+    
+    
+  
+  
+    

+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/history_replacestate_err.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_replacestate_err.html
new file mode 100644
index 0000000000..15d2181820
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_replacestate_err.html
@@ -0,0 +1,18 @@
+
+
+  
+    history_replaceState SECURITY_ERR
+    
+    
+  
+  
+    

+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/history_replacestate_nooptionalparam.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_replacestate_nooptionalparam.html
new file mode 100644
index 0000000000..838467d782
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_replacestate_nooptionalparam.html
@@ -0,0 +1,20 @@
+
+
+  
+    history_replaceStateNoOptionalParam
+    
+    
+  
+  
+    

+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/history_state.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_state.html
new file mode 100644
index 0000000000..2ee2356b1a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_state.html
@@ -0,0 +1,24 @@
+
+
+  
+    history_state
+    
+    
+  
+  
+    

+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/iframe_history_go_0.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/iframe_history_go_0.html
new file mode 100644
index 0000000000..f93f4c864e
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/iframe_history_go_0.html
@@ -0,0 +1,40 @@
+
+
+  iframe_history_go_0
+  
+  
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/joint_session_history/001-1.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/joint_session_history/001-1.html
new file mode 100644
index 0000000000..9aa5d30d16
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/joint_session_history/001-1.html
@@ -0,0 +1,72 @@
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/joint_session_history/001.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/joint_session_history/001.html
new file mode 100644
index 0000000000..c9d1c6416d
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/joint_session_history/001.html
@@ -0,0 +1,18 @@
+
+Joint session history with single iframe
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/joint_session_history/002-1.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/joint_session_history/002-1.html
new file mode 100644
index 0000000000..ed69d679da
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/joint_session_history/002-1.html
@@ -0,0 +1,35 @@
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/joint_session_history/002.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/joint_session_history/002.html
new file mode 100644
index 0000000000..b08c19e52d
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/joint_session_history/002.html
@@ -0,0 +1,18 @@
+
+Joint session history with single iframe
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/joint_session_history/filler.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/joint_session_history/filler.html
new file mode 100644
index 0000000000..93e3c7ccfc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/joint_session_history/filler.html
@@ -0,0 +1,5 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/non-automated/history.js b/testing/web-platform/tests/html/browsers/history/the-history-interface/non-automated/history.js
new file mode 100644
index 0000000000..bb5ee6dde0
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/non-automated/history.js
@@ -0,0 +1,35 @@
+function parse_query() {
+    var query = location.search.slice(1);
+    var vars = query.split("&");
+    var fields = {};
+    vars.forEach(
+        function (x) {
+            var split = x.split("=");
+            return fields[split[0]] = split.slice(1).join("=");
+        });
+    return fields;
+}
+
+var query_parts = parse_query();
+var id = "id" in query_parts ? parseInt(query_parts.id) : 1;
+var urls_to_load = query_parts.urls.split(",");
+
+document.write(id);
+
+onunload = function() {};
+
+function queue_next() {
+    t = opener.t;
+    setTimeout(t.step_func(
+        function() {
+//            opener.assert_equals(history.length, id);
+            if (urls_to_load[0]) {
+                var next_page = urls_to_load[0];
+                (next_page.indexOf("?") > -1) ? (next_page += "&") : (next_page += "?");
+                next_page += "urls=" + urls_to_load.slice(1).join(",");
+                next_page += "&id=" + ++id;
+                location = next_page;
+            }
+        }
+    ), 100);
+}
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/non-automated/history_entry.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/non-automated/history_entry.html
new file mode 100644
index 0000000000..e5929ddbe8
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/non-automated/history_entry.html
@@ -0,0 +1,12 @@
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/non-automated/traverse_the_history_unload_prompt_1-1.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/non-automated/traverse_the_history_unload_prompt_1-1.html
new file mode 100644
index 0000000000..8c4401836a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/non-automated/traverse_the_history_unload_prompt_1-1.html
@@ -0,0 +1,18 @@
+
+
+
+
You should see/have seen a prompt asking if you want to leave the page.

+
Opt to stay on the page

+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/non-automated/traverse_the_history_unload_prompt_1-manual.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/non-automated/traverse_the_history_unload_prompt_1-manual.html
new file mode 100644
index 0000000000..587cdfb124
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/non-automated/traverse_the_history_unload_prompt_1-manual.html
@@ -0,0 +1,31 @@
+
+Traversing the history, prompt in before unload, navigation denied
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/non-automated/traverse_the_history_unload_prompt_2-1.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/non-automated/traverse_the_history_unload_prompt_2-1.html
new file mode 100644
index 0000000000..608a579e69
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/non-automated/traverse_the_history_unload_prompt_2-1.html
@@ -0,0 +1,18 @@
+
+
+
+
You should see/have seen a prompt asking if you want to leave the page.

+
Opt to leave the page

+
If you weren't navigated away after opting to leave the page, that's a FAIL

diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/non-automated/traverse_the_history_unload_prompt_2-manual.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/non-automated/traverse_the_history_unload_prompt_2-manual.html
new file mode 100644
index 0000000000..94b66f8b55
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/non-automated/traverse_the_history_unload_prompt_2-manual.html
@@ -0,0 +1,31 @@
+
+Traversing the history, prompt in before unload, navigation allowed
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/non-automated/traverse_the_session_history_unload_prompt_1-1.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/non-automated/traverse_the_session_history_unload_prompt_1-1.html
new file mode 100644
index 0000000000..c0079b6bec
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/non-automated/traverse_the_session_history_unload_prompt_1-1.html
@@ -0,0 +1,17 @@
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/non-automated/traverse_the_session_history_unload_prompt_1-manual.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/non-automated/traverse_the_session_history_unload_prompt_1-manual.html
new file mode 100644
index 0000000000..7f96a39240
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/non-automated/traverse_the_session_history_unload_prompt_1-manual.html
@@ -0,0 +1,30 @@
+
+Traversing the history, unload event is fired on doucment
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/pushstate-base.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/pushstate-base.html
new file mode 100644
index 0000000000..ea95d812d7
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/pushstate-base.html
@@ -0,0 +1,18 @@
+
+
+history.pushState() with an empty string URL and base URL different from document's URL
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/pushstate-whitespace.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/pushstate-whitespace.html
new file mode 100644
index 0000000000..72d9be6a9c
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/pushstate-whitespace.html
@@ -0,0 +1,20 @@
+
+
+history.pushState() with a whitespace URL
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/pushstate.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/pushstate.html
new file mode 100644
index 0000000000..1953709269
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/pushstate.html
@@ -0,0 +1,17 @@
+
+
+history.pushState() with an empty string URL
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/replacestate-base.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/replacestate-base.html
new file mode 100644
index 0000000000..224e928de6
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/replacestate-base.html
@@ -0,0 +1,18 @@
+
+
+history.replaceState() with an empty string URL and base URL different from document's URL
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/replacestate-whitespace.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/replacestate-whitespace.html
new file mode 100644
index 0000000000..7261cdf3fa
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/replacestate-whitespace.html
@@ -0,0 +1,20 @@
+
+
+history.replaceState() with a whitespace URL
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/replacestate.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/replacestate.html
new file mode 100644
index 0000000000..66b4cc6f82
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/replacestate.html
@@ -0,0 +1,17 @@
+
+
+history.replaceState() with an empty string URL
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/resources/message-opener.sub.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/resources/message-opener.sub.html
new file mode 100644
index 0000000000..441c08c0ea
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/resources/message-opener.sub.html
@@ -0,0 +1,8 @@
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/resources/traverse-during-beforeunload.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/resources/traverse-during-beforeunload.html
new file mode 100644
index 0000000000..53a4a1886e
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/resources/traverse-during-beforeunload.html
@@ -0,0 +1,12 @@
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/resources/traverse-during-unload.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/resources/traverse-during-unload.html
new file mode 100644
index 0000000000..d5ffb7abae
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/resources/traverse-during-unload.html
@@ -0,0 +1,12 @@
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/resources/url-rewriting-helper.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/resources/url-rewriting-helper.html
new file mode 100644
index 0000000000..847d16cd1a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/resources/url-rewriting-helper.html
@@ -0,0 +1,12 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse-during-beforeunload.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse-during-beforeunload.html
new file mode 100644
index 0000000000..cb8cdca7ff
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse-during-beforeunload.html
@@ -0,0 +1,28 @@
+
+
+Traversing the history during beforeunload
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse-during-unload.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse-during-unload.html
new file mode 100644
index 0000000000..6f6e984402
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse-during-unload.html
@@ -0,0 +1,28 @@
+
+
+Traversing the history during unload
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_1-1.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_1-1.html
new file mode 100644
index 0000000000..13e89e7bc0
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_1-1.html
@@ -0,0 +1,16 @@
+
+4
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_1.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_1.html
new file mode 100644
index 0000000000..9b59bb0587
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_1.html
@@ -0,0 +1,25 @@
+
+Multiple history traversals from the same task
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_2-1.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_2-1.html
new file mode 100644
index 0000000000..fecf060eb7
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_2-1.html
@@ -0,0 +1,15 @@
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_2.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_2.html
new file mode 100644
index 0000000000..429a97d835
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_2.html
@@ -0,0 +1,26 @@
+
+Multiple history traversals, last would be aborted
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_3-1.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_3-1.html
new file mode 100644
index 0000000000..e7836fedbe
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_3-1.html
@@ -0,0 +1,15 @@
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_3.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_3.html
new file mode 100644
index 0000000000..429a97d835
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_3.html
@@ -0,0 +1,26 @@
+
+Multiple history traversals, last would be aborted
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_4-1.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_4-1.html
new file mode 100644
index 0000000000..9211da1172
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_4-1.html
@@ -0,0 +1,15 @@
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_4.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_4.html
new file mode 100644
index 0000000000..136093a2c1
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_4.html
@@ -0,0 +1,26 @@
+
+Multiple history traversals, last would be aborted
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_5-1.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_5-1.html
new file mode 100644
index 0000000000..6a28a85683
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_5-1.html
@@ -0,0 +1,15 @@
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_5.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_5.html
new file mode 100644
index 0000000000..4d3d643425
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_5.html
@@ -0,0 +1,26 @@
+
+Multiple history traversals, last would be aborted
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_unload_1-1.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_unload_1-1.html
new file mode 100644
index 0000000000..b9d8a0c694
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_unload_1-1.html
@@ -0,0 +1,15 @@
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_unload_1.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_unload_1.html
new file mode 100644
index 0000000000..4ef0ea583d
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_unload_1.html
@@ -0,0 +1,28 @@
+
+Traversing the history, unload event is fired on doucment
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_write_after_load_1-1.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_write_after_load_1-1.html
new file mode 100644
index 0000000000..945c8d81f8
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_write_after_load_1-1.html
@@ -0,0 +1,12 @@
+
+2
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_write_after_load_1.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_write_after_load_1.html
new file mode 100644
index 0000000000..404d61d0cf
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_write_after_load_1.html
@@ -0,0 +1,29 @@
+
+Traverse the history after document.write after the load event
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_write_after_load_2-1.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_write_after_load_2-1.html
new file mode 100644
index 0000000000..922e1832a6
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_write_after_load_2-1.html
@@ -0,0 +1,9 @@
+
+3
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_write_after_load_2.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_write_after_load_2.html
new file mode 100644
index 0000000000..7372e9f4ae
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_write_after_load_2.html
@@ -0,0 +1,24 @@
+
+Traverse the history back and forward when a history entry is written after the load event
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_write_onload_1-1.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_write_onload_1-1.html
new file mode 100644
index 0000000000..70d946c818
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_write_onload_1-1.html
@@ -0,0 +1,9 @@
+
+2
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_write_onload_1.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_write_onload_1.html
new file mode 100644
index 0000000000..febb4334da
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_write_onload_1.html
@@ -0,0 +1,27 @@
+
+Traverse the history when a history entry is written in the load event
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_write_onload_2-1.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_write_onload_2-1.html
new file mode 100644
index 0000000000..2716514109
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_write_onload_2-1.html
@@ -0,0 +1,9 @@
+
+3
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_write_onload_2.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_write_onload_2.html
new file mode 100644
index 0000000000..aa97d22c02
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/traverse_the_history_write_onload_2.html
@@ -0,0 +1,27 @@
+
+Traverse the history back and forward when a history entry is written in the load event
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/allow_prototype_cycle_through_location.sub.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/allow_prototype_cycle_through_location.sub.html
new file mode 100644
index 0000000000..f72ed1eaf2
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/allow_prototype_cycle_through_location.sub.html
@@ -0,0 +1,197 @@
+
+
+
+  
+
+  Location objects' custom [[GetPrototypeOf]] trap permit [[Prototype]] chain cycles to be created through them
+
+  
+  
+  
+
+  
+  
+
+
+

+
+

+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/assign_after_load-1.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/assign_after_load-1.html
new file mode 100644
index 0000000000..3d2b897221
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/assign_after_load-1.html
@@ -0,0 +1,9 @@
+
+1
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/assign_after_load-2.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/assign_after_load-2.html
new file mode 100644
index 0000000000..94679571be
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/assign_after_load-2.html
@@ -0,0 +1,7 @@
+
+2
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/assign_after_load.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/assign_after_load.html
new file mode 100644
index 0000000000..00dc931d4e
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/assign_after_load.html
@@ -0,0 +1,23 @@
+
+Assignment to location after document is completely loaded
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/assign_before_load-1.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/assign_before_load-1.html
new file mode 100644
index 0000000000..2549867c8f
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/assign_before_load-1.html
@@ -0,0 +1,7 @@
+
+1
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/assign_before_load-2.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/assign_before_load-2.html
new file mode 100644
index 0000000000..94679571be
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/assign_before_load-2.html
@@ -0,0 +1,7 @@
+
+2
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/assign_before_load.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/assign_before_load.html
new file mode 100644
index 0000000000..62a2aa7c60
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/assign_before_load.html
@@ -0,0 +1,23 @@
+
+Assignment to location before document is completely loaded
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/cross_origin_joined_frame.sub.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/cross_origin_joined_frame.sub.html
new file mode 100644
index 0000000000..a3ffdd005a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/cross_origin_joined_frame.sub.html
@@ -0,0 +1,15 @@
+
+
+
+  
+  Cross-origin subframe for Location cyclic [[Prototype]] test
+  
+
+
+
+
+
Cross-origin iframe with joined document.domain

+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/document_location.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/document_location.html
new file mode 100644
index 0000000000..3bdb028212
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/document_location.html
@@ -0,0 +1,39 @@
+
+document.location
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/location-non-configurable-toString-valueOf.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/location-non-configurable-toString-valueOf.html
new file mode 100644
index 0000000000..80760ac9e4
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/location-non-configurable-toString-valueOf.html
@@ -0,0 +1,42 @@
+
+
+Same-origin Location objects have non-configurable "toString" and "valueOf" properties
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/location-origin-idna.sub.window.js b/testing/web-platform/tests/html/browsers/history/the-location-interface/location-origin-idna.sub.window.js
new file mode 100644
index 0000000000..83b030f886
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/location-origin-idna.sub.window.js
@@ -0,0 +1,11 @@
+async_test(t => {
+  const frame = document.createElement("iframe"),
+        asciiOrigin = location.protocol + "//{{domains[天気の良い日]}}:" + location.port,
+        path = new URL("resources/post-your-origin.html", location).pathname;
+  frame.src = asciiOrigin + path;
+  self.onmessage = t.step_func_done(e => {
+    assert_equals(e.data.origin, asciiOrigin);
+  });
+  document.body.appendChild(frame);
+  t.add_cleanup(() => frame.remove());
+}, "Test that location.origin returns ASCII");
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/location-pathname-setter-question-mark.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/location-pathname-setter-question-mark.html
new file mode 100644
index 0000000000..09546020f7
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/location-pathname-setter-question-mark.html
@@ -0,0 +1,16 @@
+
+Set location.pathname to ?
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/location-prevent-extensions.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/location-prevent-extensions.html
new file mode 100644
index 0000000000..a8c777aded
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/location-prevent-extensions.html
@@ -0,0 +1,21 @@
+
+
+[[PreventExtensions]] on a Location object should return false
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/location-protocol-setter-non-broken-weird.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/location-protocol-setter-non-broken-weird.html
new file mode 100644
index 0000000000..544eb4ad9a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/location-protocol-setter-non-broken-weird.html
@@ -0,0 +1,35 @@
+
+Set location.protocol from an HTTP URL
+
+
+
+

+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/location-protocol-setter-non-broken.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/location-protocol-setter-non-broken.html
new file mode 100644
index 0000000000..585016eae9
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/location-protocol-setter-non-broken.html
@@ -0,0 +1,63 @@
+
+Set location.protocol to a non-broken-non-functioning scheme
+
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/location-protocol-setter-sameish.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/location-protocol-setter-sameish.html
new file mode 100644
index 0000000000..c581ae35aa
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/location-protocol-setter-sameish.html
@@ -0,0 +1,26 @@
+
+Set location.protocol to the scheme it already was
+
+
+

+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/location-protocol-setter-with-colon.sub.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/location-protocol-setter-with-colon.sub.html
new file mode 100644
index 0000000000..0612b5c709
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/location-protocol-setter-with-colon.sub.html
@@ -0,0 +1,52 @@
+
+
+
+
+
+

+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/location-protocol-setter.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/location-protocol-setter.html
new file mode 100644
index 0000000000..3d051e8cfb
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/location-protocol-setter.html
@@ -0,0 +1,104 @@
+
+Set location.protocol to schemes that throw
+
+
+

+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/location-prototype-no-toString-valueOf.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/location-prototype-no-toString-valueOf.html
new file mode 100644
index 0000000000..56316320af
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/location-prototype-no-toString-valueOf.html
@@ -0,0 +1,55 @@
+
+
+Location.prototype objects don't have own "toString" and "valueOf" properties
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/location-prototype-setting-cross-origin-domain.sub.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/location-prototype-setting-cross-origin-domain.sub.html
new file mode 100644
index 0000000000..1e677b0365
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/location-prototype-setting-cross-origin-domain.sub.html
@@ -0,0 +1,31 @@
+
+
+[[SetPrototypeOf]] on a Location object should not allow changing its value: cross-origin via document.domain
+
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/location-prototype-setting-cross-origin.sub.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/location-prototype-setting-cross-origin.sub.html
new file mode 100644
index 0000000000..7bb6a27e21
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/location-prototype-setting-cross-origin.sub.html
@@ -0,0 +1,28 @@
+
+
+[[SetPrototypeOf]] on a Location object should not allow changing its value: cross-origin
+
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/location-prototype-setting-goes-cross-origin-domain.sub.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/location-prototype-setting-goes-cross-origin-domain.sub.html
new file mode 100644
index 0000000000..8966a814c5
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/location-prototype-setting-goes-cross-origin-domain.sub.html
@@ -0,0 +1,39 @@
+
+
+[[SetPrototypeOf]] on a Location object should not allow changing its value: cross-origin via document.domain after initially getting the object
+
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/location-prototype-setting-same-origin-domain.sub.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/location-prototype-setting-same-origin-domain.sub.html
new file mode 100644
index 0000000000..8ec7585daa
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/location-prototype-setting-same-origin-domain.sub.html
@@ -0,0 +1,30 @@
+
+
+[[SetPrototypeOf]] on a Location object should not allow changing its value: cross-origin, but same-origin-domain
+
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/location-prototype-setting-same-origin.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/location-prototype-setting-same-origin.html
new file mode 100644
index 0000000000..f912004f73
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/location-prototype-setting-same-origin.html
@@ -0,0 +1,21 @@
+
+
+[[SetPrototypeOf]] on a location object should not allow changing its value: same-origin
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/location-stringifier.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/location-stringifier.html
new file mode 100644
index 0000000000..48bad7af0e
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/location-stringifier.html
@@ -0,0 +1,24 @@
+
+Location stringifier
+
+
+
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/location-symbol-toprimitive.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/location-symbol-toprimitive.html
new file mode 100644
index 0000000000..e666a3e703
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/location-symbol-toprimitive.html
@@ -0,0 +1,14 @@
+
+Location Symbol.toPrimitive
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/location-tojson.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/location-tojson.html
new file mode 100644
index 0000000000..5f20a6e15c
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/location-tojson.html
@@ -0,0 +1,13 @@
+
+Location has no toJSON
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/location-valueof.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/location-valueof.html
new file mode 100644
index 0000000000..978bbb63a0
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/location-valueof.html
@@ -0,0 +1,15 @@
+
+Location valueOf
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/location_assign.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/location_assign.html
new file mode 100644
index 0000000000..55f26d5660
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/location_assign.html
@@ -0,0 +1,26 @@
+
+
+  
+    location_assign
+    
+    
+  
+  
+    

+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/location_assign_about_blank-1.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/location_assign_about_blank-1.html
new file mode 100644
index 0000000000..b43598f2cd
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/location_assign_about_blank-1.html
@@ -0,0 +1,2 @@
+
+Filler text
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/location_assign_about_blank.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/location_assign_about_blank.html
new file mode 100644
index 0000000000..f3f7cf26b8
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/location_assign_about_blank.html
@@ -0,0 +1,24 @@
+
+location.assign with initial about:blank browsing context
+
+
+

+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/location_hash.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/location_hash.html
new file mode 100644
index 0000000000..c063e285ea
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/location_hash.html
@@ -0,0 +1,62 @@
+
+
+  
+    location_hash
+    
+    
+  
+  
+    

+    
+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/location_host.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/location_host.html
new file mode 100644
index 0000000000..d93bf47e50
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/location_host.html
@@ -0,0 +1,28 @@
+
+
+  
+    location_host
+    
+    
+  
+  
+    

+    
+ 
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/location_hostname.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/location_hostname.html
new file mode 100644
index 0000000000..2ffa0e5fc8
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/location_hostname.html
@@ -0,0 +1,33 @@
+
+
+  
+    location_hostname
+    
+    
+  
+  
+    

+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/location_href.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/location_href.html
new file mode 100644
index 0000000000..1aa85dcdc8
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/location_href.html
@@ -0,0 +1,19 @@
+
+
+  
+    location_href
+    
+    
+  
+  
+    

+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/location_origin.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/location_origin.html
new file mode 100644
index 0000000000..2325f4018a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/location_origin.html
@@ -0,0 +1,14 @@
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/location_pathname.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/location_pathname.html
new file mode 100644
index 0000000000..dea05d2f37
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/location_pathname.html
@@ -0,0 +1,22 @@
+
+
+  
+    location_pathname
+    
+    
+  
+  
+    

+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/location_port.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/location_port.html
new file mode 100644
index 0000000000..fa1308ca5d
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/location_port.html
@@ -0,0 +1,31 @@
+
+
+  
+    location_port
+    
+    
+  
+  
+    

+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/location_protocol.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/location_protocol.html
new file mode 100644
index 0000000000..d28bd56393
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/location_protocol.html
@@ -0,0 +1,25 @@
+
+
+  
+    location_protocol
+    
+    
+  
+  
+    

+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/location_reload-iframe.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/location_reload-iframe.html
new file mode 100644
index 0000000000..f08cf5de3e
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/location_reload-iframe.html
@@ -0,0 +1,4 @@
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/location_reload.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/location_reload.html
new file mode 100644
index 0000000000..0a2d21d8d2
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/location_reload.html
@@ -0,0 +1,43 @@
+
+
+  
+    location_reload
+    
+    
+  
+  
+    

+
+    
+
+    
+
+  
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/location_reload_javascript_url.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/location_reload_javascript_url.html
new file mode 100644
index 0000000000..737cafbcd3
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/location_reload_javascript_url.html
@@ -0,0 +1,60 @@
+
+
+  
+    location_reload_javascript_url
+    
+    
+  
+  
+    

+
+    
+
+    
+
+  
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/location_replace.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/location_replace.html
new file mode 100644
index 0000000000..0593420d40
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/location_replace.html
@@ -0,0 +1,26 @@
+
+
+  
+    location_replace
+    
+    
+  
+  
+    

+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/location_search.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/location_search.html
new file mode 100644
index 0000000000..f9db757841
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/location_search.html
@@ -0,0 +1,20 @@
+
+
+  
+    location_search
+    
+    
+  
+  
+    

+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/no-browsing-context.window.js b/testing/web-platform/tests/html/browsers/history/the-location-interface/no-browsing-context.window.js
new file mode 100644
index 0000000000..4077d90971
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/no-browsing-context.window.js
@@ -0,0 +1,86 @@
+test(() => {
+  const frame = document.body.appendChild(document.createElement("iframe")),
+        win = frame.contentWindow,
+        loc = win.location;
+  frame.remove();
+  assert_equals(win.location, loc);
+}, "Window and Location are 1:1 after browsing context removal");
+
+function bcLessLocation() {
+  const frame = document.body.appendChild(document.createElement("iframe")),
+        win = frame.contentWindow,
+        loc = win.location;
+  frame.remove();
+  return loc;
+}
+
+[
+  {
+    "property": "href",
+    "expected": "about:blank",
+    "values": ["https://example.com/", "/", "http://test:test/", "test test", "test:test", "chrome:fail"]
+  },
+  {
+    "property": "protocol",
+    "expected": "about:",
+    "values": ["http", "about", "test"]
+  },
+  {
+    "property": "host",
+    "expected": "",
+    "values": ["example.com", "test test", "()"]
+  },
+  {
+    "property": "hostname",
+    "expected": "",
+    "values": ["example.com"]
+  },
+  {
+    "property": "port",
+    "expected": "",
+    "values": ["80", "", "443", "notaport"]
+  },
+  {
+    "property": "pathname",
+    "expected": "blank",
+    "values": ["/", "x"]
+  },
+  {
+    "property": "search",
+    "expected": "",
+    "values": ["test"]
+  },
+  {
+    "property": "hash",
+    "expected": "",
+    "values": ["test", "#"]
+  }
+].forEach(testSetup => {
+  testSetup.values.forEach(value => {
+  	test(() => {
+  	  const loc = bcLessLocation();
+  	  loc[testSetup.property] = value;
+  	  assert_equals(loc[testSetup.property], testSetup.expected);
+  	}, "Setting `" + testSetup.property + "` to `" + value + "` of a `Location` object sans browsing context is a no-op");
+  });
+});
+
+test(() => {
+  const loc = bcLessLocation();
+  assert_equals(loc.origin, "null");
+}, "Getting `origin` of a `Location` object sans browsing context should be \"null\"");
+
+["assign", "replace", "reload"].forEach(method => {
+  ["about:blank", "https://example.com/", "/", "http://test:test/", "test test", "test:test", "chrome:fail"].forEach(value => {
+    test(() => {
+      const loc = bcLessLocation();
+      loc[method](value);
+      assert_equals(loc.href, "about:blank");
+    }, "Invoking `" + method + "` with `" + value + "` on a `Location` object sans browsing context is a no-op");
+  });
+});
+
+test(() => {
+  const loc = bcLessLocation();
+  assert_array_equals(loc.ancestorOrigins, []);
+}, "Getting `ancestorOrigins` of a `Location` object sans browsing context should be []");
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/non-automated/manual_click_assign_during_load-1.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/non-automated/manual_click_assign_during_load-1.html
new file mode 100644
index 0000000000..c762ece3bc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/non-automated/manual_click_assign_during_load-1.html
@@ -0,0 +1,7 @@
+
+
+Click Here
+
Filler image to keep the page loading:

+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/non-automated/manual_click_assign_during_load-2.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/non-automated/manual_click_assign_during_load-2.html
new file mode 100644
index 0000000000..1bf7f41e00
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/non-automated/manual_click_assign_during_load-2.html
@@ -0,0 +1,7 @@
+
+
This window should close itself and the test result appear in the original window
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/non-automated/manual_click_assign_during_load-manual.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/non-automated/manual_click_assign_during_load-manual.html
new file mode 100644
index 0000000000..45a0e3e2fd
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/non-automated/manual_click_assign_during_load-manual.html
@@ -0,0 +1,17 @@
+
+Assignment to location with click during load
+
+
+
The popup blocker must be disabled for this test

+

+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/non-automated/manual_click_location_replace_during_load-1.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/non-automated/manual_click_location_replace_during_load-1.html
new file mode 100644
index 0000000000..e9d03e9364
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/non-automated/manual_click_location_replace_during_load-1.html
@@ -0,0 +1,10 @@
+
+
+Click Here
+
Filler image to keep the page loading:

+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/non-automated/manual_click_location_replace_during_load-2.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/non-automated/manual_click_location_replace_during_load-2.html
new file mode 100644
index 0000000000..1bf7f41e00
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/non-automated/manual_click_location_replace_during_load-2.html
@@ -0,0 +1,7 @@
+
+
This window should close itself and the test result appear in the original window
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/non-automated/manual_click_location_replace_during_load-manual.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/non-automated/manual_click_location_replace_during_load-manual.html
new file mode 100644
index 0000000000..a453de34bf
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/non-automated/manual_click_location_replace_during_load-manual.html
@@ -0,0 +1,17 @@
+
+location.replace with click during load
+
+
+
The popup blocker must be disabled for this test

+

+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/non-automated/manual_click_replace_during_load-manual.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/non-automated/manual_click_replace_during_load-manual.html
new file mode 100644
index 0000000000..482858bcd7
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/non-automated/manual_click_replace_during_load-manual.html
@@ -0,0 +1,17 @@
+
+Assignment to location with click during load
+
+
+
The popup blocker must be disabled for this test

+

+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/non-automated/manual_form_submit_assign_during_load-1.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/non-automated/manual_form_submit_assign_during_load-1.html
new file mode 100644
index 0000000000..08f7e2dd68
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/non-automated/manual_form_submit_assign_during_load-1.html
@@ -0,0 +1,9 @@
+
+
+

+
+

+
Filler image to keep the page loading:

+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/non-automated/manual_form_submit_assign_during_load-2.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/non-automated/manual_form_submit_assign_during_load-2.html
new file mode 100644
index 0000000000..1bf7f41e00
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/non-automated/manual_form_submit_assign_during_load-2.html
@@ -0,0 +1,7 @@
+
+
This window should close itself and the test result appear in the original window
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/non-automated/manual_form_submit_assign_during_load-manual.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/non-automated/manual_form_submit_assign_during_load-manual.html
new file mode 100644
index 0000000000..d71b206ac5
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/non-automated/manual_form_submit_assign_during_load-manual.html
@@ -0,0 +1,17 @@
+
+Assignment to location with form submit during load
+
+
+
The popup blocker must be disabled for this test

+

+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/non-automated/reload_in_resize-1.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/non-automated/reload_in_resize-1.html
new file mode 100644
index 0000000000..05b44f4c40
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/non-automated/reload_in_resize-1.html
@@ -0,0 +1,15 @@
+
+
Resize this window. FAIL if the window doesn't close shortly afterwards.

+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/non-automated/reload_in_resize-manual.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/non-automated/reload_in_resize-manual.html
new file mode 100644
index 0000000000..5cb3fac964
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/non-automated/reload_in_resize-manual.html
@@ -0,0 +1,26 @@
+
+Reload called from resize event
+
+
+
Resize the popup window. That window should then close and the result be presented here. If that window doesn't close after resize that's a FAIL.

+

+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/per-global.window.js b/testing/web-platform/tests/html/browsers/history/the-location-interface/per-global.window.js
new file mode 100644
index 0000000000..b2956fd21f
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/per-global.window.js
@@ -0,0 +1,3 @@
+// META: script=/common/object-association.js
+
+testIsPerWindow("location");
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/reload_document_open_write-1.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/reload_document_open_write-1.html
new file mode 100644
index 0000000000..e1a2e811c9
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/reload_document_open_write-1.html
@@ -0,0 +1,19 @@
+
+1
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/reload_document_open_write.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/reload_document_open_write.html
new file mode 100644
index 0000000000..905ef88743
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/reload_document_open_write.html
@@ -0,0 +1,26 @@
+
+Reload document with document.open and document.written content
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/reload_document_write-1.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/reload_document_write-1.html
new file mode 100644
index 0000000000..9a08433920
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/reload_document_write-1.html
@@ -0,0 +1,4 @@
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/reload_document_write.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/reload_document_write.html
new file mode 100644
index 0000000000..fb5fddc7da
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/reload_document_write.html
@@ -0,0 +1,21 @@
+
+Reload document with document.written content
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/reload_document_write_onload-1.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/reload_document_write_onload-1.html
new file mode 100644
index 0000000000..36445af3c8
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/reload_document_write_onload-1.html
@@ -0,0 +1,9 @@
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/reload_document_write_onload.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/reload_document_write_onload.html
new file mode 100644
index 0000000000..b2cf31147a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/reload_document_write_onload.html
@@ -0,0 +1,26 @@
+
+Reload document with document.written content written in load event
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/reload_post_1-manual.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/reload_post_1-manual.html
new file mode 100644
index 0000000000..95ef660559
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/reload_post_1-manual.html
@@ -0,0 +1,27 @@
+
+Reload document with POST
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/resources/post-your-origin.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/resources/post-your-origin.html
new file mode 100644
index 0000000000..a8a614c182
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/resources/post-your-origin.html
@@ -0,0 +1,3 @@
+
\ No newline at end of file
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/resources/post-your-protocol.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/resources/post-your-protocol.html
new file mode 100644
index 0000000000..c50d623893
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/resources/post-your-protocol.html
@@ -0,0 +1,4 @@
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/resources/reload_post_1-1.py b/testing/web-platform/tests/html/browsers/history/the-location-interface/resources/reload_post_1-1.py
new file mode 100644
index 0000000000..56397f07b4
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/resources/reload_post_1-1.py
@@ -0,0 +1,13 @@
+def main(request, response):
+    headers = [(b"Content-Type", b"text/html")]
+    return headers, u'''
+        
+        

+            
+            
+        

+        
+    '''
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/same-hash.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/same-hash.html
new file mode 100644
index 0000000000..430a57662a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/same-hash.html
@@ -0,0 +1,101 @@
+
+
+Using the location interface to navigate to the same hash as the current one
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/same_origin_frame.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/same_origin_frame.html
new file mode 100644
index 0000000000..953e696b2a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/same_origin_frame.html
@@ -0,0 +1,12 @@
+
+
+
+  
+  Same-origin subframe for Location cyclic [[Prototype]] test
+  
+
+
+
+
Same-origin iframe

+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/scripted_click_assign_during_load-1.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/scripted_click_assign_during_load-1.html
new file mode 100644
index 0000000000..9561cabdd1
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/scripted_click_assign_during_load-1.html
@@ -0,0 +1,10 @@
+
+
+Click Here
+
+
Filler image to keep the page loading:

+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/scripted_click_assign_during_load-2.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/scripted_click_assign_during_load-2.html
new file mode 100644
index 0000000000..1bf7f41e00
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/scripted_click_assign_during_load-2.html
@@ -0,0 +1,7 @@
+
+
This window should close itself and the test result appear in the original window
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/scripted_click_assign_during_load.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/scripted_click_assign_during_load.html
new file mode 100644
index 0000000000..7ccc6cdc09
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/scripted_click_assign_during_load.html
@@ -0,0 +1,17 @@
+
+Assignment to location with click during load
+
+
+
The popup blocker must be disabled for this test

+

+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/scripted_click_location_assign_during_load-1.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/scripted_click_location_assign_during_load-1.html
new file mode 100644
index 0000000000..05bb42f967
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/scripted_click_location_assign_during_load-1.html
@@ -0,0 +1,13 @@
+
+
+Click Here
+
+
Filler image to keep the page loading:

+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/scripted_click_location_assign_during_load-2.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/scripted_click_location_assign_during_load-2.html
new file mode 100644
index 0000000000..1bf7f41e00
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/scripted_click_location_assign_during_load-2.html
@@ -0,0 +1,7 @@
+
+
This window should close itself and the test result appear in the original window
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/scripted_click_location_assign_during_load.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/scripted_click_location_assign_during_load.html
new file mode 100644
index 0000000000..64f3ff942f
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/scripted_click_location_assign_during_load.html
@@ -0,0 +1,16 @@
+
+location.assign with click during load
+
+
+
The popup blocker must be disabled for this test

+

+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/scripted_form_submit_assign_during_load-1.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/scripted_form_submit_assign_during_load-1.html
new file mode 100644
index 0000000000..ae07ac5cfc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/scripted_form_submit_assign_during_load-1.html
@@ -0,0 +1,12 @@
+
+
+

+
+

+
+
Filler image to keep the page loading:

+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/scripted_form_submit_assign_during_load-2.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/scripted_form_submit_assign_during_load-2.html
new file mode 100644
index 0000000000..1bf7f41e00
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/scripted_form_submit_assign_during_load-2.html
@@ -0,0 +1,7 @@
+
+
This window should close itself and the test result appear in the original window
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/scripted_form_submit_assign_during_load.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/scripted_form_submit_assign_during_load.html
new file mode 100644
index 0000000000..2a6eba63ab
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/scripted_form_submit_assign_during_load.html
@@ -0,0 +1,17 @@
+
+Assignment to location with form submit during load
+
+
+
The popup blocker must be disabled for this test

+

+
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/security_location_0.htm b/testing/web-platform/tests/html/browsers/history/the-location-interface/security_location_0.htm
new file mode 100644
index 0000000000..f509c23b18
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/security_location_0.htm
@@ -0,0 +1,27 @@
+
+
+  
+    Location interface Security
+    
+    
+    
+    
+    
+  
+  
+    
Access location object from different origins doesn't raise SECURITY_ERR exception

+    

+    
+    
+    
+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-session-history-of-browsing-contexts/navigation-in-onload.html b/testing/web-platform/tests/html/browsers/history/the-session-history-of-browsing-contexts/navigation-in-onload.html
new file mode 100644
index 0000000000..367d7eea3e
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-session-history-of-browsing-contexts/navigation-in-onload.html
@@ -0,0 +1,37 @@
+
+
+
+Navigation in onload handler
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-session-history-of-browsing-contexts/navigation-in-onload_form-submission-1.html b/testing/web-platform/tests/html/browsers/history/the-session-history-of-browsing-contexts/navigation-in-onload_form-submission-1.html
new file mode 100644
index 0000000000..2079224467
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-session-history-of-browsing-contexts/navigation-in-onload_form-submission-1.html
@@ -0,0 +1,15 @@
+
+
+  
+    
+    Navigation in onload handler through form submission
+    
+  
+  
+    

+  
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-session-history-of-browsing-contexts/navigation-in-onload_form-submission-2.html b/testing/web-platform/tests/html/browsers/history/the-session-history-of-browsing-contexts/navigation-in-onload_form-submission-2.html
new file mode 100644
index 0000000000..11fbe2a2ba
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-session-history-of-browsing-contexts/navigation-in-onload_form-submission-2.html
@@ -0,0 +1,22 @@
+
+
+  
+    
+    Navigation in onload handler through form submission
+    
+  
+  
+  
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-session-history-of-browsing-contexts/navigation-in-onload_form-submission-dynamic-iframe.html b/testing/web-platform/tests/html/browsers/history/the-session-history-of-browsing-contexts/navigation-in-onload_form-submission-dynamic-iframe.html
new file mode 100644
index 0000000000..aabae3d770
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-session-history-of-browsing-contexts/navigation-in-onload_form-submission-dynamic-iframe.html
@@ -0,0 +1,16 @@
+
+
+  
+    
+    Navigation in onload handler through form submission in a dynamically created iframe
+    
+  
+  
+  
+
diff --git a/testing/web-platform/tests/html/browsers/history/the-session-history-of-browsing-contexts/navigation-in-onload_form-submission-iframe.html b/testing/web-platform/tests/html/browsers/history/the-session-history-of-browsing-contexts/navigation-in-onload_form-submission-iframe.html
new file mode 100644
index 0000000000..5fa786d1f5
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-session-history-of-browsing-contexts/navigation-in-onload_form-submission-iframe.html
@@ -0,0 +1,10 @@
+
+
+  
+    
+    Navigation in onload handler through form submission in an iframe
+  
+  
+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/offline/application-cache-api/api_status_checking-manual.html b/testing/web-platform/tests/html/browsers/offline/application-cache-api/api_status_checking-manual.html
new file mode 100644
index 0000000000..a4a3b41a7d
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/offline/application-cache-api/api_status_checking-manual.html
@@ -0,0 +1,23 @@
+
+
+  
+    Offline Application Cache - API_status_CHECKING
+    
+    
+  
+  
+    
    
+      
  1. Refresh the page.
    2. 
+    

+
+    

+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/offline/application-cache-api/api_status_downloading-manual.html b/testing/web-platform/tests/html/browsers/offline/application-cache-api/api_status_downloading-manual.html
new file mode 100644
index 0000000000..c09d11d787
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/offline/application-cache-api/api_status_downloading-manual.html
@@ -0,0 +1,24 @@
+
+
+  
+    Offline Application Cache - API_status_DOWNLOADING
+    
+    
+  
+  
+    
    
+      
  1. Modify the commented part in the manifest file (manifest/clock.manifest) on the server.
    2. 
+      
  2. Refresh the page.
    3. 
+    

+    

+
+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/offline/application-cache-api/api_status_obsolete-manual.html b/testing/web-platform/tests/html/browsers/offline/application-cache-api/api_status_obsolete-manual.html
new file mode 100644
index 0000000000..77005644a2
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/offline/application-cache-api/api_status_obsolete-manual.html
@@ -0,0 +1,24 @@
+
+
+  
+    Offline Application Cache - API_status_OBSOLETE
+    
+    
+  
+  
+    
    
+      
  1. Remove the manifest file (manifest/clock.manifest) from the server.
    2. 
+      
  2. Refresh the page.
    3. 
+    

+    

+
+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/offline/application-cache-api/api_status_updateready-manual.html b/testing/web-platform/tests/html/browsers/offline/application-cache-api/api_status_updateready-manual.html
new file mode 100644
index 0000000000..7e1533374b
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/offline/application-cache-api/api_status_updateready-manual.html
@@ -0,0 +1,25 @@
+
+
+  
+    Offline Application Cache - API_status_UPDATEREADY
+    
+    
+  
+  
+    
    
+      
  1. Modify the commented part in the manifest file (manifest/clock.manifest) on the server.
    2. 
+      
  2. Refresh the page.
    3. 
+    

+
+    

+
+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/offline/application-cache-api/api_swapcache-manual.html b/testing/web-platform/tests/html/browsers/offline/application-cache-api/api_swapcache-manual.html
new file mode 100644
index 0000000000..6649d980f6
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/offline/application-cache-api/api_swapcache-manual.html
@@ -0,0 +1,30 @@
+
+
+  
+    Offline Application Cache - API_swapCache
+    
+    
+  
+  
+    
    
+      
  1. Modify the part of comment in manifest file of server.
    2. 
+      
  2. Refresh the page.
    3. 
+    

+
+    

+
+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/offline/browser-state/navigator_online_event-manual.https.html b/testing/web-platform/tests/html/browsers/offline/browser-state/navigator_online_event-manual.https.html
new file mode 100644
index 0000000000..81cad4f4fe
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/offline/browser-state/navigator_online_event-manual.https.html
@@ -0,0 +1,46 @@
+
+
+ 
+  Offline Application Cache
+  
+ 
+ 
+  
navigator_online_event

+
+  
    
+  
  1. Change the 'work offline' mode.
    2. 
+  
  2. If actual result and expected result are same, then test is Pass, otherwise Fail.
    3. 
+  

+
+  

+
+  
Actual Result

+  

+    
+  

+
+  
Expected Result

+  

+    apply 'work offline': offline event is raised.
release 'work offline': online event is raised.
+  

+  
+ 
+
diff --git a/testing/web-platform/tests/html/browsers/offline/browser-state/navigator_online_online.https.html b/testing/web-platform/tests/html/browsers/offline/browser-state/navigator_online_online.https.html
new file mode 100644
index 0000000000..81547c3fb9
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/offline/browser-state/navigator_online_online.https.html
@@ -0,0 +1,17 @@
+
+
+  
+    Offline Application Cache - navigator_online_online
+    
+    
+  
+  
+    

+
+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/offline/changestonetworkingmodel/original-id.json b/testing/web-platform/tests/html/browsers/offline/changestonetworkingmodel/original-id.json
new file mode 100644
index 0000000000..2f77367c8f
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/offline/changestonetworkingmodel/original-id.json
@@ -0,0 +1 @@
+{"original_id":"changesToNetworkingModel"}
\ No newline at end of file
diff --git a/testing/web-platform/tests/html/browsers/offline/introduction-4/event_downloading-manual.html b/testing/web-platform/tests/html/browsers/offline/introduction-4/event_downloading-manual.html
new file mode 100644
index 0000000000..26b003f06e
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/offline/introduction-4/event_downloading-manual.html
@@ -0,0 +1,23 @@
+
+
+  
+    Offline Application Cache - Event_downloading
+    
+    
+  
+  
+    
    
+      
  1. Modify the commented part of the manifest file (manifest/clock.manifest) on the server.
    2. 
+      
  2. Refresh the page.
    3. 
+    

+
+    

+
+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/offline/introduction-4/event_error-manual.html b/testing/web-platform/tests/html/browsers/offline/introduction-4/event_error-manual.html
new file mode 100644
index 0000000000..19abb3d6bf
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/offline/introduction-4/event_error-manual.html
@@ -0,0 +1,23 @@
+
+
+  
+    Offline Application Cache - Event_error
+    
+    
+  
+  
+    
    
+      
  1. Add a dummy file in the manifest file (manifest/clock.manifest).
    2. 
+      
  2. Refresh the page.
    3. 
+    

+
+    

+
+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/offline/introduction-4/event_obsolete-manual.html b/testing/web-platform/tests/html/browsers/offline/introduction-4/event_obsolete-manual.html
new file mode 100644
index 0000000000..cab5e01cc7
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/offline/introduction-4/event_obsolete-manual.html
@@ -0,0 +1,23 @@
+
+
+  
+    Offline Application Cache - Event_obsolete
+    
+    
+  
+  
+    
    
+      
  1. Remove the manifest file (manifest/clock.manifest) from the server.
    2. 
+      
  2. Refresh the page.
    3. 
+    

+
+    

+
+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/offline/introduction-4/event_updateready-manual.html b/testing/web-platform/tests/html/browsers/offline/introduction-4/event_updateready-manual.html
new file mode 100644
index 0000000000..4de435144d
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/offline/introduction-4/event_updateready-manual.html
@@ -0,0 +1,22 @@
+
+
+  
+    Offline Application Cache - Event_updateready
+    
+    
+  
+  
+    
    
+      
  1. Modify the commented part in the manifest file (manifest/clock.manifest) on the server.
    2. 
+      
  2. Refresh the page.
    3. 
+    

+    

+
+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/offline/introduction-4/event_updateready_swapcache-manual.html b/testing/web-platform/tests/html/browsers/offline/introduction-4/event_updateready_swapcache-manual.html
new file mode 100644
index 0000000000..da6cead026
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/offline/introduction-4/event_updateready_swapcache-manual.html
@@ -0,0 +1,30 @@
+
+
+  
+    Offline Application Cache - Event_updateready_swapCache
+    
+    
+  
+  
+    
    
+      
  1. Modify the commented part in manifest file (manifest/clock.manifest) on the server.
    2. 
+      
  2. Refresh the page.
    3. 
+    

+
+    

+
+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/offline/manifest_main_empty-manual.https.html b/testing/web-platform/tests/html/browsers/offline/manifest_main_empty-manual.https.html
new file mode 100644
index 0000000000..317aaa1137
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/offline/manifest_main_empty-manual.https.html
@@ -0,0 +1,14 @@
+
+
+  
+    Offline Application Cache - manifest_main_empty
+    
+  
+  
+    
    
+      
  1. Disable the network connection.
    2. 
+      
  2. Refresh the page.
    3. 
+      
  3. If the page is normally displayed, then test is PASS, otherwise FAIL.
    4. 
+    

+  
+
diff --git a/testing/web-platform/tests/html/browsers/offline/manifest_notchanged_online-manual.https.html b/testing/web-platform/tests/html/browsers/offline/manifest_notchanged_online-manual.https.html
new file mode 100644
index 0000000000..a464b426a7
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/offline/manifest_notchanged_online-manual.https.html
@@ -0,0 +1,19 @@
+
+
+  
+    Offline Application Cache - manifest_notchanged_online
+    
+    
+    
+    
+  
+  
+    
    
+      
  1. Remove time element of this html document and not change manifest file.
    2. 
+      
  2. Refresh the page.
    3. 
+      
  3. If the page is normally displayed, then test is PASS, otherwise FAIL.
    4. 
+    

+
+    
The time is: 

+  
+
diff --git a/testing/web-platform/tests/html/browsers/offline/manifest_section_empty-manual.https.html b/testing/web-platform/tests/html/browsers/offline/manifest_section_empty-manual.https.html
new file mode 100644
index 0000000000..eea2dbba35
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/offline/manifest_section_empty-manual.https.html
@@ -0,0 +1,19 @@
+
+
+  
+    Offline Application Cache - manifest_section_empty
+    
+    
+    
+    
+  
+  
+    
    
+      
  1. Disable the network connection.
    2. 
+      
  2. Refresh the page.
    3. 
+      
  3. If the time element and colors of result elements are normally displayed, then test is PASS, otherwise FAIL.
    4. 
+    

+
+    
The time is: 

+  
+
diff --git a/testing/web-platform/tests/html/browsers/offline/manifest_section_many-manual.https.html b/testing/web-platform/tests/html/browsers/offline/manifest_section_many-manual.https.html
new file mode 100644
index 0000000000..9378df1b40
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/offline/manifest_section_many-manual.https.html
@@ -0,0 +1,19 @@
+
+
+  
+    Offline Application Cache - manifest_section_many
+    
+    
+    
+    
+  
+  
+    
    
+      
  1. Disable the network connection.
    2. 
+      
  2. Refresh the page.
    3. 
+      
  3. If the time element and colors of result elements are normally displayed, then test is PASS, otherwise FAIL.
    4. 
+    

+
+    
The time is: 

+  
+
diff --git a/testing/web-platform/tests/html/browsers/offline/resources/css/clock.css b/testing/web-platform/tests/html/browsers/offline/resources/css/clock.css
new file mode 100644
index 0000000000..fa406d0fbe
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/offline/resources/css/clock.css
@@ -0,0 +1 @@
+output { font: 1em sans-serif; }
\ No newline at end of file
diff --git a/testing/web-platform/tests/html/browsers/offline/resources/css/offline.css b/testing/web-platform/tests/html/browsers/offline/resources/css/offline.css
new file mode 100644
index 0000000000..76b7f39853
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/offline/resources/css/offline.css
@@ -0,0 +1,5 @@
+.connectivity {
+    color: #fff;
+    background: red;
+    padding: 20px;
+}
\ No newline at end of file
diff --git a/testing/web-platform/tests/html/browsers/offline/resources/css/online.css b/testing/web-platform/tests/html/browsers/offline/resources/css/online.css
new file mode 100644
index 0000000000..39efcb2ab4
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/offline/resources/css/online.css
@@ -0,0 +1,5 @@
+.connectivity {
+    color: #fff;
+    background: blue;
+    padding: 20px;
+}
\ No newline at end of file
diff --git a/testing/web-platform/tests/html/browsers/offline/resources/css/result.css b/testing/web-platform/tests/html/browsers/offline/resources/css/result.css
new file mode 100644
index 0000000000..7d784b8ab5
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/offline/resources/css/result.css
@@ -0,0 +1,11 @@
+.manualpass {
+  color: green;
+}
+.manualfail {
+  color: red;
+}.pass {
+  color: green;
+}
+.fail {
+  color: red;
+}
diff --git a/testing/web-platform/tests/html/browsers/offline/resources/html/clock.html b/testing/web-platform/tests/html/browsers/offline/resources/html/clock.html
new file mode 100644
index 0000000000..6b8949a6b1
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/offline/resources/html/clock.html
@@ -0,0 +1,12 @@
+
+
+
+ 
+  Clock
+  
+  
+ 
+ 
+  
The time is: 

+ 
+
\ No newline at end of file
diff --git a/testing/web-platform/tests/html/browsers/offline/resources/js/clock.js b/testing/web-platform/tests/html/browsers/offline/resources/js/clock.js
new file mode 100644
index 0000000000..1ac0dca539
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/offline/resources/js/clock.js
@@ -0,0 +1,3 @@
+setTimeout(function () {
+    document.getElementById('clock').value = new Date();
+}, 1000);
\ No newline at end of file
diff --git a/testing/web-platform/tests/html/browsers/offline/resources/manifest/clock.manifest b/testing/web-platform/tests/html/browsers/offline/resources/manifest/clock.manifest
new file mode 100644
index 0000000000..a61aae6c61
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/offline/resources/manifest/clock.manifest
@@ -0,0 +1,17 @@
+CACHE MANIFEST
+
+# Version 1
+
+CACHE:
+../css/clock.css
+../js/clock.js
+../css/result.css
+../css/offline.css
+/resources/testharness.js
+/resources/testharnessreport.js
+
+NETWORK:
+../html/clock.html
+
+FALLBACK:
+../css/online.css ../css/offline.css
\ No newline at end of file
diff --git a/testing/web-platform/tests/html/browsers/offline/resources/manifest/section_empty.manifest b/testing/web-platform/tests/html/browsers/offline/resources/manifest/section_empty.manifest
new file mode 100644
index 0000000000..a23b9013be
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/offline/resources/manifest/section_empty.manifest
@@ -0,0 +1,10 @@
+CACHE MANIFEST
+
+# Version 1
+
+../css/clock.css
+../js/clock.js
+../css/result.css
+../css/online.css
+/resources/testharness.js
+/resources/testharnessreport.js
\ No newline at end of file
diff --git a/testing/web-platform/tests/html/browsers/offline/resources/manifest/section_many.manifest b/testing/web-platform/tests/html/browsers/offline/resources/manifest/section_many.manifest
new file mode 100644
index 0000000000..7e5e5e9995
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/offline/resources/manifest/section_many.manifest
@@ -0,0 +1,19 @@
+CACHE MANIFEST
+
+# Version 1
+
+CACHE:
+../css/clock.css
+../js/clock.js
+
+CACHE:
+../css/result.css
+../css/offline.css
+/resources/testharness.js
+/resources/testharnessreport.js
+
+NETWORK:
+../html/clock.html
+
+FALLBACK:
+../css/online.css ../css/offline.css
\ No newline at end of file
diff --git a/testing/web-platform/tests/html/browsers/offline/resources/manifest/url_check.manifest b/testing/web-platform/tests/html/browsers/offline/resources/manifest/url_check.manifest
new file mode 100644
index 0000000000..041df5e55f
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/offline/resources/manifest/url_check.manifest
@@ -0,0 +1,17 @@
+CACHE MANIFEST
+
+# Version 1
+
+CACHE:
+../css/cl#ock.css
+../js/clock.js
+../css/result.css
+../css/offline.css
+/resources/testharness.js
+/resources/testharnessreport.js
+
+NETWORK:
+../html/clock.html
+
+FALLBACK:
+../css/online.css ../css/offline.css
\ No newline at end of file
diff --git a/testing/web-platform/tests/html/browsers/offline/section_network_offline-manual.https.html b/testing/web-platform/tests/html/browsers/offline/section_network_offline-manual.https.html
new file mode 100644
index 0000000000..c4121f5bc5
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/offline/section_network_offline-manual.https.html
@@ -0,0 +1,17 @@
+
+
+  
+    Offline Application Cache - Section_network_offline
+    
+  
+  
+    
    
+      
  1. Disable the network connection.
    2. 
+      
  2. Refresh the page.
    3. 
+      
  3. If only the frame element can't be loaded, then test is PASS, otherwise FAIL.
    4. 
+    

+
+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/offline/section_network_online-manual.https.html b/testing/web-platform/tests/html/browsers/offline/section_network_online-manual.https.html
new file mode 100644
index 0000000000..a5d8e59406
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/offline/section_network_online-manual.https.html
@@ -0,0 +1,16 @@
+
+
+  
+    Offline Application Cache - Section_network_online
+    
+  
+  
+    
    
+      
  1. Refresh the page.
    2. 
+      
  2. If the frame element is loaded, then test is PASS, otherwise FAIL.
    3. 
+    

+
+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/origin/cross-origin-objects/cross-origin-due-to-document-domain-only.html b/testing/web-platform/tests/html/browsers/origin/cross-origin-objects/cross-origin-due-to-document-domain-only.html
new file mode 100644
index 0000000000..425374faec
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/cross-origin-objects/cross-origin-due-to-document-domain-only.html
@@ -0,0 +1,33 @@
+
+Cross-origin due to document.domain
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/cross-origin-objects/cross-origin-objects-function-caching.html b/testing/web-platform/tests/html/browsers/origin/cross-origin-objects/cross-origin-objects-function-caching.html
new file mode 100644
index 0000000000..a8af18d106
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/cross-origin-objects/cross-origin-objects-function-caching.html
@@ -0,0 +1,49 @@
+
+
+Cross-origin methods and accessors are cached per Realm via[[CrossOriginPropertyDescriptorMap]]
+
+
+
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/origin/cross-origin-objects/cross-origin-objects-function-common.js b/testing/web-platform/tests/html/browsers/origin/cross-origin-objects/cross-origin-objects-function-common.js
new file mode 100644
index 0000000000..3b93b498a2
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/cross-origin-objects/cross-origin-objects-function-common.js
@@ -0,0 +1,34 @@
+"use strict";
+
+const crossOriginWindowMethods = [
+    {key: "close", length: 0},
+    {key: "focus", length: 0},
+    {key: "blur", length: 0},
+    {key: "postMessage", length: 1},
+];
+
+const crossOriginWindowAccessors = [
+    "window",
+    "self",
+    "location",
+    "closed",
+    "frames",
+    "length",
+    "top",
+    "opener",
+    "parent",
+].map(key => ({key}));
+
+const makeCrossOriginWindow = t => {
+    const iframe = document.createElement("iframe");
+    const path = location.pathname.slice(0, location.pathname.lastIndexOf("/")) + "/frame.html";
+    iframe.src = get_host_info().HTTP_REMOTE_ORIGIN + path;
+
+    return new Promise((resolve, reject) => {
+        iframe.onload = () => { resolve(iframe.contentWindow); };
+        iframe.onerror = reject;
+
+        document.body.append(iframe);
+        t.add_cleanup(() => { iframe.remove(); });
+    });
+};
diff --git a/testing/web-platform/tests/html/browsers/origin/cross-origin-objects/cross-origin-objects-function-length.html b/testing/web-platform/tests/html/browsers/origin/cross-origin-objects/cross-origin-objects-function-length.html
new file mode 100644
index 0000000000..466915a461
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/cross-origin-objects/cross-origin-objects-function-length.html
@@ -0,0 +1,45 @@
+
+
+Cross-origin methods and accessors are created with correct 'length' property
+
+
+
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/origin/cross-origin-objects/cross-origin-objects-function-name.html b/testing/web-platform/tests/html/browsers/origin/cross-origin-objects/cross-origin-objects-function-name.html
new file mode 100644
index 0000000000..167c30e8f3
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/cross-origin-objects/cross-origin-objects-function-name.html
@@ -0,0 +1,45 @@
+
+
+Cross-origin methods and accessors are created with correct 'name' property
+
+
+
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/origin/cross-origin-objects/cross-origin-objects-on-new-window.html b/testing/web-platform/tests/html/browsers/origin/cross-origin-objects/cross-origin-objects-on-new-window.html
new file mode 100644
index 0000000000..3ad0de6a3a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/cross-origin-objects/cross-origin-objects-on-new-window.html
@@ -0,0 +1,25 @@
+
+
+
+Cross-origin behavior of Window and Location on new Window
+
+
+
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/origin/cross-origin-objects/cross-origin-objects.html b/testing/web-platform/tests/html/browsers/origin/cross-origin-objects/cross-origin-objects.html
new file mode 100644
index 0000000000..d1b6cabc0f
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/cross-origin-objects/cross-origin-objects.html
@@ -0,0 +1,718 @@
+
+
+
+Cross-origin behavior of Window and Location
+
+
+
+
+
+
+

+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/cross-origin-objects/frame-with-then.html b/testing/web-platform/tests/html/browsers/origin/cross-origin-objects/frame-with-then.html
new file mode 100644
index 0000000000..3eedeca38a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/cross-origin-objects/frame-with-then.html
@@ -0,0 +1,19 @@
+
+
+  
+  
+    
+    
+    
+    
+    
+    
+    
+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/origin/cross-origin-objects/frame.html b/testing/web-platform/tests/html/browsers/origin/cross-origin-objects/frame.html
new file mode 100644
index 0000000000..ca2dd8ebf8
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/cross-origin-objects/frame.html
@@ -0,0 +1,51 @@
+
+
+
+
+
+
+  
+  
+  
+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/cross-origin-objects/location-properties-smoke-test.window.js b/testing/web-platform/tests/html/browsers/origin/cross-origin-objects/location-properties-smoke-test.window.js
new file mode 100644
index 0000000000..45b61d07f5
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/cross-origin-objects/location-properties-smoke-test.window.js
@@ -0,0 +1,51 @@
+// META: variant=?assign
+// META: variant=?customproperty
+// META: variant=?hash
+// META: variant=?host
+// META: variant=?hostname
+// META: variant=?pathname
+// META: variant=?port
+// META: variant=?protocol
+// META: variant=?reload
+// META: variant=?search
+// META: variant=?toString
+// META: variant=?valueOf
+// META: script=/common/get-host-info.sub.js
+// META: script=/common/utils.js
+// META: script=/common/dispatcher/dispatcher.js
+
+const property = window.location.search.substr(1);
+
+promise_test(async t => {
+  const iframeContext = new RemoteContext(token());
+  const iframe = document.createElement("iframe");
+  iframe.src = get_host_info().REMOTE_ORIGIN +
+    "/common/dispatcher/remote-executor.html?uuid=" + iframeContext.context_id;
+  document.body.appendChild(iframe);
+
+  // Wait for the cross-origin document to be loaded inside the iframe.
+  assert_equals(
+    await iframeContext.execute_script(() => "Document loaded") ,
+    "Document loaded"
+  );
+
+  assert_throws_dom("SecurityError", () => {
+    const unused = iframe.contentWindow.location[property];
+  }, "Cross origin get of a location property should throw a security error");
+
+  assert_throws_dom("SecurityError", () => {
+    iframe.contentWindow.location[property] = "Random string";
+  }, "Cross origin set of a location property should throw a security error");
+
+  // Verify that the property was indeed not modified.
+  assert_not_equals(
+    await iframeContext.execute_script(property => location[property],
+                                       [property]),
+    "Random string",
+  );
+
+  assert_throws_dom("SecurityError", () => {
+    const unused = Object.getOwnPropertyDescriptor(
+      iframe.contentWindow.location, property);
+  }, "Cross origin get of descriptors should throw a security error");
+}, `Verifying that cross-origin access of '${property}' is restricted`);
diff --git a/testing/web-platform/tests/html/browsers/origin/cross-origin-objects/resources/cross-origin-due-to-document-domain-only-helper.html b/testing/web-platform/tests/html/browsers/origin/cross-origin-objects/resources/cross-origin-due-to-document-domain-only-helper.html
new file mode 100644
index 0000000000..10ac8ece0e
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/cross-origin-objects/resources/cross-origin-due-to-document-domain-only-helper.html
@@ -0,0 +1,9 @@
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/cross-origin-objects/win-documentdomain.sub.html b/testing/web-platform/tests/html/browsers/origin/cross-origin-objects/win-documentdomain.sub.html
new file mode 100644
index 0000000000..a315e21208
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/cross-origin-objects/win-documentdomain.sub.html
@@ -0,0 +1,63 @@
+
+
+
+  
+  
+
+
+  
+  
+  
+  
+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/cross-origin-objects/window-location-and-location-href-cross-realm-set.html b/testing/web-platform/tests/html/browsers/origin/cross-origin-objects/window-location-and-location-href-cross-realm-set.html
new file mode 100644
index 0000000000..f03550a141
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/cross-origin-objects/window-location-and-location-href-cross-realm-set.html
@@ -0,0 +1,106 @@
+
+
+Cross-realm [[Set]] to window.location and location.href throws an error of correct realm
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/inheritance/about-blank-iframe.html b/testing/web-platform/tests/html/browsers/origin/inheritance/about-blank-iframe.html
new file mode 100644
index 0000000000..fabde327a1
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/inheritance/about-blank-iframe.html
@@ -0,0 +1,28 @@
+
+
+  
+    about:blank in child browsing context aliases security origin
+    
+    
+  
+  
+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/origin/inheritance/about-blank-window.html b/testing/web-platform/tests/html/browsers/origin/inheritance/about-blank-window.html
new file mode 100644
index 0000000000..cc3177f943
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/inheritance/about-blank-window.html
@@ -0,0 +1,25 @@
+
+
+  
+    about:blank in auxiliary browsing context aliases security origin
+    
+    
+  
+  
+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/origin/inheritance/about-srcdoc.html b/testing/web-platform/tests/html/browsers/origin/inheritance/about-srcdoc.html
new file mode 100644
index 0000000000..971811ee66
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/inheritance/about-srcdoc.html
@@ -0,0 +1,29 @@
+
+
+  
+    about:srcdoc aliases security origin
+    
+    
+  
+  
+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/origin/inheritance/document-write.https.window.js b/testing/web-platform/tests/html/browsers/origin/inheritance/document-write.https.window.js
new file mode 100644
index 0000000000..39dc3b1cc2
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/inheritance/document-write.https.window.js
@@ -0,0 +1,10 @@
+// META: script=/common/get-host-info.sub.js
+
+// To use document.domain, we need to start from a subdomain.
+//
+// For document.domain setter to work, some web browser require the
+// |Origin-Agent-Cluster: ?0| header to be set uniformly on the origin.
+const origin = get_host_info().OTHER_ORIGIN;
+const openee = window.open(
+  origin + '/html/browsers/origin/inheritance/resources/document-write.html')
+fetch_tests_from_window(openee);
diff --git a/testing/web-platform/tests/html/browsers/origin/inheritance/document-write.https.window.js.headers b/testing/web-platform/tests/html/browsers/origin/inheritance/document-write.https.window.js.headers
new file mode 100644
index 0000000000..e007de4d7b
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/inheritance/document-write.https.window.js.headers
@@ -0,0 +1 @@
+Origin-Agent-Cluster: ?0
diff --git a/testing/web-platform/tests/html/browsers/origin/inheritance/javascript-url.html b/testing/web-platform/tests/html/browsers/origin/inheritance/javascript-url.html
new file mode 100644
index 0000000000..7dfb1130ce
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/inheritance/javascript-url.html
@@ -0,0 +1,33 @@
+
+
+  
+    javascript: aliases security origin
+    
+    
+  
+  
+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/origin/inheritance/resources/document-write.html b/testing/web-platform/tests/html/browsers/origin/inheritance/resources/document-write.html
new file mode 100644
index 0000000000..7a6ff3118e
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/inheritance/resources/document-write.html
@@ -0,0 +1,40 @@
+
+
+  
+    
+    
+  
+  
+  
+
diff --git a/testing/web-platform/tests/html/browsers/origin/inheritance/resources/document-write.html.headers b/testing/web-platform/tests/html/browsers/origin/inheritance/resources/document-write.html.headers
new file mode 100644
index 0000000000..e007de4d7b
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/inheritance/resources/document-write.html.headers
@@ -0,0 +1 @@
+Origin-Agent-Cluster: ?0
diff --git a/testing/web-platform/tests/html/browsers/origin/inheritance/resources/iframe-with-about-blank-iframe.html b/testing/web-platform/tests/html/browsers/origin/inheritance/resources/iframe-with-about-blank-iframe.html
new file mode 100644
index 0000000000..b3f5125233
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/inheritance/resources/iframe-with-about-blank-iframe.html
@@ -0,0 +1,7 @@
+
+
+  
+    
+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/origin/inheritance/resources/iframe-with-about-blank-iframe.html.headers b/testing/web-platform/tests/html/browsers/origin/inheritance/resources/iframe-with-about-blank-iframe.html.headers
new file mode 100644
index 0000000000..e007de4d7b
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/inheritance/resources/iframe-with-about-blank-iframe.html.headers
@@ -0,0 +1 @@
+Origin-Agent-Cluster: ?0
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-no-child-bad-subdomain.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-no-child-bad-subdomain.sub.https.html
new file mode 100644
index 0000000000..3a45ee6d6a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-no-child-bad-subdomain.sub.https.html
@@ -0,0 +1,27 @@
+
+
+Parent is site-keyed, child attempts to origin-key but uses a bad header value, child is a subdomain of the parent
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-no-child-yes-port.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-no-child-yes-port.sub.https.html
new file mode 100644
index 0000000000..85fb1f64e0
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-no-child-yes-port.sub.https.html
@@ -0,0 +1,27 @@
+
+
+Parent is site-keyed, child is origin-keyed, child is different-origin to the parent because of a port mismatch
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-no-child-yes-same.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-no-child-yes-same.sub.https.html
new file mode 100644
index 0000000000..7ece02c81a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-no-child-yes-same.sub.https.html
@@ -0,0 +1,27 @@
+
+
+Parent is site-keyed, child is origin-keyed, child is same-origin to the parent
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-no-child-yes-subdomain-with-redirect.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-no-child-yes-subdomain-with-redirect.sub.https.html
new file mode 100644
index 0000000000..994f80876d
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-no-child-yes-subdomain-with-redirect.sub.https.html
@@ -0,0 +1,27 @@
+
+
+Parent is site-keyed, child is reached via a redirect response with no header, child final response does have the header
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-no-child-yes-subdomain.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-no-child-yes-subdomain.sub.https.html
new file mode 100644
index 0000000000..5fc2fa29f3
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-no-child-yes-subdomain.sub.https.html
@@ -0,0 +1,27 @@
+
+
+Parent is site-keyed, child is origin-keyed, child is a subdomain of the parent
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-no-child-yeswithparams-subdomain.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-no-child-yeswithparams-subdomain.sub.https.html
new file mode 100644
index 0000000000..3e7c8419b3
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-no-child-yeswithparams-subdomain.sub.https.html
@@ -0,0 +1,27 @@
+
+
+Parent is site-keyed, child is origin-keyed using parameters on its structured header, child is a subdomain of the parent
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-yes-child-no-port.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-yes-child-no-port.sub.https.html
new file mode 100644
index 0000000000..f00814cfbf
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-yes-child-no-port.sub.https.html
@@ -0,0 +1,27 @@
+
+
+Parent is origin-keyed, child is site-keyed, child is is different-origin to the parent because of a port mismatch
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-yes-child-no-port.sub.https.html.headers b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-yes-child-no-port.sub.https.html.headers
new file mode 100644
index 0000000000..79a20f30fc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-yes-child-no-port.sub.https.html.headers
@@ -0,0 +1 @@
+Origin-Agent-Cluster: ?1
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-yes-child-no-same.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-yes-child-no-same.sub.https.html
new file mode 100644
index 0000000000..307f8c48d7
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-yes-child-no-same.sub.https.html
@@ -0,0 +1,26 @@
+
+
+Parent is origin-keyed, child is site-keyed, child is same-origin to the parent
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-yes-child-no-same.sub.https.html.headers b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-yes-child-no-same.sub.https.html.headers
new file mode 100644
index 0000000000..79a20f30fc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-yes-child-no-same.sub.https.html.headers
@@ -0,0 +1 @@
+Origin-Agent-Cluster: ?1
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-yes-child-no-subdomain.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-yes-child-no-subdomain.sub.https.html
new file mode 100644
index 0000000000..8c823fa36f
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-yes-child-no-subdomain.sub.https.html
@@ -0,0 +1,27 @@
+
+
+Parent is origin-keyed, child is site-keyed, child is a subdomain of the parent
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-yes-child-no-subdomain.sub.https.html.headers b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-yes-child-no-subdomain.sub.https.html.headers
new file mode 100644
index 0000000000..79a20f30fc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-yes-child-no-subdomain.sub.https.html.headers
@@ -0,0 +1 @@
+Origin-Agent-Cluster: ?1
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-yes-child-yes-port.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-yes-child-yes-port.sub.https.html
new file mode 100644
index 0000000000..5e431e6e41
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-yes-child-yes-port.sub.https.html
@@ -0,0 +1,27 @@
+
+
+Parent is origin-keyed, child is site-keyed, child is different-origin to the parent because of a port mismatch
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-yes-child-yes-port.sub.https.html.headers b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-yes-child-yes-port.sub.https.html.headers
new file mode 100644
index 0000000000..79a20f30fc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-yes-child-yes-port.sub.https.html.headers
@@ -0,0 +1 @@
+Origin-Agent-Cluster: ?1
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-yes-child-yes-same.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-yes-child-yes-same.sub.https.html
new file mode 100644
index 0000000000..3b8c214a61
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-yes-child-yes-same.sub.https.html
@@ -0,0 +1,26 @@
+
+
+Parent is origin-keyed, child is site-keyed, child is same-origin to the parent
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-yes-child-yes-same.sub.https.html.headers b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-yes-child-yes-same.sub.https.html.headers
new file mode 100644
index 0000000000..79a20f30fc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-yes-child-yes-same.sub.https.html.headers
@@ -0,0 +1 @@
+Origin-Agent-Cluster: ?1
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-yes-child-yes-subdomain.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-yes-child-yes-subdomain.sub.https.html
new file mode 100644
index 0000000000..136a3a0bba
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-yes-child-yes-subdomain.sub.https.html
@@ -0,0 +1,27 @@
+
+
+Parent is origin-keyed, child is site-keyed, child is a subdomain of the parent
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-yes-child-yes-subdomain.sub.https.html.headers b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-yes-child-yes-subdomain.sub.https.html.headers
new file mode 100644
index 0000000000..79a20f30fc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/1-iframe/parent-yes-child-yes-subdomain.sub.https.html.headers
@@ -0,0 +1 @@
+Origin-Agent-Cluster: ?1
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-no-child1-no-subdomain-child2-yes-subdomain.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-no-child1-no-subdomain-child2-yes-subdomain.sub.https.html
new file mode 100644
index 0000000000..1bb252f0ab
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-no-child1-no-subdomain-child2-yes-subdomain.sub.https.html
@@ -0,0 +1,36 @@
+
+
+Parent is site-keyed, subdomain child 1 is site-keyed, same-subdomain child 2 is origin-keyed
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-no-child1-no-subdomain-child2-yes-subdomainport.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-no-child1-no-subdomain-child2-yes-subdomainport.sub.https.html
new file mode 100644
index 0000000000..5b80c528f0
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-no-child1-no-subdomain-child2-yes-subdomainport.sub.https.html
@@ -0,0 +1,37 @@
+
+
+Parent is site-keyed, subdomain child 1 is site-keyed, different-port-same-subdomain child 2 is origin-keyed
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-no-child1-no-subdomain1-child2-yes-subdomain2.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-no-child1-no-subdomain1-child2-yes-subdomain2.sub.https.html
new file mode 100644
index 0000000000..bba13b82a4
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-no-child1-no-subdomain1-child2-yes-subdomain2.sub.https.html
@@ -0,0 +1,37 @@
+
+
+Parent is site-keyed, subdomain child 1 is site-keyed, different-subdomain child 2 is origin-keyed
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-no-child1-yes-subdomain-child2-no-port.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-no-child1-yes-subdomain-child2-no-port.sub.https.html
new file mode 100644
index 0000000000..d01d180213
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-no-child1-yes-subdomain-child2-no-port.sub.https.html
@@ -0,0 +1,37 @@
+
+
+Parent is site-keyed, subdomain child 1 is origin-keyed, non-subdomain but different-port child 2 is site-keyed
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-no-child1-yes-subdomain-child2-no-subdomain.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-no-child1-yes-subdomain-child2-no-subdomain.sub.https.html
new file mode 100644
index 0000000000..9a245b3ace
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-no-child1-yes-subdomain-child2-no-subdomain.sub.https.html
@@ -0,0 +1,38 @@
+
+
+Parent is site-keyed, subdomain child 1 is origin-keyed, same-subdomain child 2 is site-keyed
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-no-subdomain-child2-no-subdomain.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-no-subdomain-child2-no-subdomain.sub.https.html
new file mode 100644
index 0000000000..c308b9a17a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-no-subdomain-child2-no-subdomain.sub.https.html
@@ -0,0 +1,38 @@
+
+
+Parent is origin-keyed, subdomain child 1 is site-keyed, same-subdomain child 2 is site-keyed
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-no-subdomain-child2-no-subdomain.sub.https.html.headers b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-no-subdomain-child2-no-subdomain.sub.https.html.headers
new file mode 100644
index 0000000000..79a20f30fc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-no-subdomain-child2-no-subdomain.sub.https.html.headers
@@ -0,0 +1 @@
+Origin-Agent-Cluster: ?1
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-no-subdomain-child2-no-subdomain2.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-no-subdomain-child2-no-subdomain2.sub.https.html
new file mode 100644
index 0000000000..767d908c21
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-no-subdomain-child2-no-subdomain2.sub.https.html
@@ -0,0 +1,38 @@
+
+
+Parent is origin-keyed, subdomain child 1 is site-keyed, different-subdomain child 2 is site-keyed
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-no-subdomain-child2-no-subdomain2.sub.https.html.headers b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-no-subdomain-child2-no-subdomain2.sub.https.html.headers
new file mode 100644
index 0000000000..79a20f30fc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-no-subdomain-child2-no-subdomain2.sub.https.html.headers
@@ -0,0 +1 @@
+Origin-Agent-Cluster: ?1
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-no-subdomain-child2-yes-subdomain.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-no-subdomain-child2-yes-subdomain.sub.https.html
new file mode 100644
index 0000000000..45047f3ae1
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-no-subdomain-child2-yes-subdomain.sub.https.html
@@ -0,0 +1,38 @@
+
+
+Parent is origin-keyed, subdomain child 1 is site-keyed, same-subdomain child 2 is origin-keyed
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-no-subdomain-child2-yes-subdomain.sub.https.html.headers b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-no-subdomain-child2-yes-subdomain.sub.https.html.headers
new file mode 100644
index 0000000000..79a20f30fc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-no-subdomain-child2-yes-subdomain.sub.https.html.headers
@@ -0,0 +1 @@
+Origin-Agent-Cluster: ?1
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-no-subdomain-child2-yes-subdomain2.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-no-subdomain-child2-yes-subdomain2.sub.https.html
new file mode 100644
index 0000000000..202b916767
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-no-subdomain-child2-yes-subdomain2.sub.https.html
@@ -0,0 +1,38 @@
+
+
+Parent is origin-keyed, subdomain child 1 is site-keyed, different-subdomain child 2 is origin-keyed
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-no-subdomain-child2-yes-subdomain2.sub.https.html.headers b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-no-subdomain-child2-yes-subdomain2.sub.https.html.headers
new file mode 100644
index 0000000000..79a20f30fc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-no-subdomain-child2-yes-subdomain2.sub.https.html.headers
@@ -0,0 +1 @@
+Origin-Agent-Cluster: ?1
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-no-subdomain-child2-yes-subdomainport.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-no-subdomain-child2-yes-subdomainport.sub.https.html
new file mode 100644
index 0000000000..a1316731ac
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-no-subdomain-child2-yes-subdomainport.sub.https.html
@@ -0,0 +1,38 @@
+
+
+Parent is origin-keyed, subdomain child 1 is site-keyed, different-port-same-subdomain child 2 is origin-keyed
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-no-subdomain-child2-yes-subdomainport.sub.https.html.headers b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-no-subdomain-child2-yes-subdomainport.sub.https.html.headers
new file mode 100644
index 0000000000..79a20f30fc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-no-subdomain-child2-yes-subdomainport.sub.https.html.headers
@@ -0,0 +1 @@
+Origin-Agent-Cluster: ?1
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-yes-subdomain-child2-no-port.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-yes-subdomain-child2-no-port.sub.https.html
new file mode 100644
index 0000000000..46bef4b9a9
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-yes-subdomain-child2-no-port.sub.https.html
@@ -0,0 +1,36 @@
+
+
+Parent is origin-keyed, subdomain child 1 is origin-keyed, non-subdomain but different-port child 2 is site-keyed
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-yes-subdomain-child2-no-port.sub.https.html.headers b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-yes-subdomain-child2-no-port.sub.https.html.headers
new file mode 100644
index 0000000000..79a20f30fc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-yes-subdomain-child2-no-port.sub.https.html.headers
@@ -0,0 +1 @@
+Origin-Agent-Cluster: ?1
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-yes-subdomain-child2-no-subdomain.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-yes-subdomain-child2-no-subdomain.sub.https.html
new file mode 100644
index 0000000000..39dcfc04b0
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-yes-subdomain-child2-no-subdomain.sub.https.html
@@ -0,0 +1,38 @@
+
+
+Parent is origin-keyed, subdomain child 1 is origin-keyed, same-subdomain child 2 is site-keyed
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-yes-subdomain-child2-no-subdomain.sub.https.html.headers b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-yes-subdomain-child2-no-subdomain.sub.https.html.headers
new file mode 100644
index 0000000000..79a20f30fc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-yes-subdomain-child2-no-subdomain.sub.https.html.headers
@@ -0,0 +1 @@
+Origin-Agent-Cluster: ?1
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-yes-subdomain-child2-yes-subdomain.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-yes-subdomain-child2-yes-subdomain.sub.https.html
new file mode 100644
index 0000000000..b6daf91b54
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-yes-subdomain-child2-yes-subdomain.sub.https.html
@@ -0,0 +1,39 @@
+
+
+Parent is origin-keyed, subdomain child 1 is origin-keyed, same-subdomain child 2 is site-keyed
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-yes-subdomain-child2-yes-subdomain.sub.https.html.headers b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-yes-subdomain-child2-yes-subdomain.sub.https.html.headers
new file mode 100644
index 0000000000..79a20f30fc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-yes-subdomain-child2-yes-subdomain.sub.https.html.headers
@@ -0,0 +1 @@
+Origin-Agent-Cluster: ?1
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-yes-subdomain-child2-yes-subdomain2.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-yes-subdomain-child2-yes-subdomain2.sub.https.html
new file mode 100644
index 0000000000..b94f9392d4
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-yes-subdomain-child2-yes-subdomain2.sub.https.html
@@ -0,0 +1,38 @@
+
+
+Parent is origin-keyed, subdomain child 1 is origin-keyed, different-subdomain child 2 is origin-keyed
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-yes-subdomain-child2-yes-subdomain2.sub.https.html.headers b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-yes-subdomain-child2-yes-subdomain2.sub.https.html.headers
new file mode 100644
index 0000000000..79a20f30fc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-yes-subdomain-child2-yes-subdomain2.sub.https.html.headers
@@ -0,0 +1 @@
+Origin-Agent-Cluster: ?1
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-yes-subdomain-child2-yes-subdomainport.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-yes-subdomain-child2-yes-subdomainport.sub.https.html
new file mode 100644
index 0000000000..fb3fda1bf2
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-yes-subdomain-child2-yes-subdomainport.sub.https.html
@@ -0,0 +1,38 @@
+
+
+Parent is origin-keyed, subdomain child 1 is origin-keyed, different-port-same-subdomain child 2 is origin-keyed
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-yes-subdomain-child2-yes-subdomainport.sub.https.html.headers b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-yes-subdomain-child2-yes-subdomainport.sub.https.html.headers
new file mode 100644
index 0000000000..79a20f30fc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/2-iframes/parent-yes-child1-yes-subdomain-child2-yes-subdomainport.sub.https.html.headers
@@ -0,0 +1 @@
+Origin-Agent-Cluster: ?1
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/META.yml b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/META.yml
new file mode 100644
index 0000000000..f21ce69f6a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/META.yml
@@ -0,0 +1,5 @@
+spec: https://html.spec.whatwg.org/multipage/#origin-keyed-agent-clusters
+suggested_reviewers:
+  - domenic
+  - annevk
+  - wjmaclean
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/README.md b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/README.md
new file mode 100644
index 0000000000..85ba3bce7f
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/README.md
@@ -0,0 +1,30 @@
+# Origin-keyed agent clusters tests
+
+These are tests for the [origin-keyed agent clusters](https://html.spec.whatwg.org/multipage/origin.html#origin-keyed-agent-clusters)
+feature.
+
+## Test filenames
+
+The tests in `2-iframes` follow the file naming pattern
+
+```
+parent-[yes|no]-child1-[yes|no]-[designator]-child2-[yes|no]-[designator]
+```
+
+Here:
+
+* `yes` or `no` refers to whether the `Origin-Agent-Cluster` header is set or
+  unset.
+* `designator` explains how the child differs from the parent: e.g. by being a
+  subdomain, or having a different port, or both. There's also `same` if it's
+  same-origin.
+
+Other directories have variations on this, e.g. `1-iframe/` does the same thing
+but for a single `child` instead of `child1` and `child2`, and `navigation/`
+uses `1` and `2` to represent the two different locations the single iframe will
+be navigated to.
+
+## Coverage
+
+Header parsing is covered by a few tests in the `1-iframe/` subdirectory, and
+not duplicated to all other scenarios.
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/about-blank.https.sub.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/about-blank.https.sub.html
new file mode 100644
index 0000000000..556d528aa0
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/about-blank.https.sub.html
@@ -0,0 +1,63 @@
+
+
+The initial about:blank respects origin isolation
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/about-blank.https.sub.html.headers b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/about-blank.https.sub.html.headers
new file mode 100644
index 0000000000..79a20f30fc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/about-blank.https.sub.html.headers
@@ -0,0 +1 @@
+Origin-Agent-Cluster: ?1
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/document-domain.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/document-domain.sub.https.html
new file mode 100644
index 0000000000..b4535d9e54
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/document-domain.sub.https.html
@@ -0,0 +1,52 @@
+
+
+Setting document.domain does not change same-originness when origin-keyed
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/document-domain.sub.https.html.headers b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/document-domain.sub.https.html.headers
new file mode 100644
index 0000000000..79a20f30fc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/document-domain.sub.https.html.headers
@@ -0,0 +1 @@
+Origin-Agent-Cluster: ?1
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/cross-origin-isolated.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/cross-origin-isolated.sub.https.html
new file mode 100644
index 0000000000..a521934cc9
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/cross-origin-isolated.sub.https.html
@@ -0,0 +1,28 @@
+
+
+window.originAgentCluster must be implied by cross-origin isolation
+
+
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/cross-origin-isolated.sub.https.html.headers b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/cross-origin-isolated.sub.https.html.headers
new file mode 100644
index 0000000000..5f8621ef83
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/cross-origin-isolated.sub.https.html.headers
@@ -0,0 +1,2 @@
+Cross-Origin-Embedder-Policy: require-corp
+Cross-Origin-Opener-Policy: same-origin
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/csp-sandbox-no.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/csp-sandbox-no.https.html
new file mode 100644
index 0000000000..e0b5f92376
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/csp-sandbox-no.https.html
@@ -0,0 +1,15 @@
+
+
+window.originAgentCluster for a top-level frame sandboxed by CSP with no Origin-Agent-Cluster header
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/csp-sandbox-no.https.html.headers b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/csp-sandbox-no.https.html.headers
new file mode 100644
index 0000000000..4705ce9ded
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/csp-sandbox-no.https.html.headers
@@ -0,0 +1 @@
+Content-Security-Policy: sandbox allow-scripts;
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/csp-sandbox-yes.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/csp-sandbox-yes.https.html
new file mode 100644
index 0000000000..a2220c5acc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/csp-sandbox-yes.https.html
@@ -0,0 +1,15 @@
+
+
+window.originAgentCluster for a top-level frame sandboxed by CSP with an Origin-Agent-Cluster header
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/csp-sandbox-yes.https.html.headers b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/csp-sandbox-yes.https.html.headers
new file mode 100644
index 0000000000..a52bf50900
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/csp-sandbox-yes.https.html.headers
@@ -0,0 +1,2 @@
+Content-Security-Policy: sandbox allow-scripts;
+Origin-Agent-Cluster: ?1
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/data-to-javascript-no.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/data-to-javascript-no.https.html
new file mode 100644
index 0000000000..06149cda8a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/data-to-javascript-no.https.html
@@ -0,0 +1,12 @@
+
+
+window.originAgentCluster for a javascript: URL navigated to from a data: URL on a site-keyed page
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/data-to-javascript-yes.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/data-to-javascript-yes.https.html
new file mode 100644
index 0000000000..af6fea0ad9
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/data-to-javascript-yes.https.html
@@ -0,0 +1,12 @@
+
+
+window.originAgentCluster for a javascript: URL navigated to from a data: URL on an origin-keyed page
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/data-to-javascript-yes.https.html.headers b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/data-to-javascript-yes.https.html.headers
new file mode 100644
index 0000000000..79a20f30fc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/data-to-javascript-yes.https.html.headers
@@ -0,0 +1 @@
+Origin-Agent-Cluster: ?1
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/data-url-no.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/data-url-no.https.html
new file mode 100644
index 0000000000..8ae564a072
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/data-url-no.https.html
@@ -0,0 +1,12 @@
+
+
+window.originAgentCluster for a data: URL on a site-keyed page
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/data-url-yes.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/data-url-yes.https.html
new file mode 100644
index 0000000000..bcbf098a66
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/data-url-yes.https.html
@@ -0,0 +1,12 @@
+
+
+window.originAgentCluster for a data: URL on an origin-keyed page
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/data-url-yes.https.html.headers b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/data-url-yes.https.html.headers
new file mode 100644
index 0000000000..79a20f30fc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/data-url-yes.https.html.headers
@@ -0,0 +1 @@
+Origin-Agent-Cluster: ?1
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/javascript-url-no.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/javascript-url-no.https.html
new file mode 100644
index 0000000000..1b54ad42a4
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/javascript-url-no.https.html
@@ -0,0 +1,12 @@
+
+
+window.originAgentCluster for a javascript: URL on a site-keyed page
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/javascript-url-yes.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/javascript-url-yes.https.html
new file mode 100644
index 0000000000..e2b7730dd2
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/javascript-url-yes.https.html
@@ -0,0 +1,12 @@
+
+
+window.originAgentCluster for a javascript: URL on an origin-keyed page
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/javascript-url-yes.https.html.headers b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/javascript-url-yes.https.html.headers
new file mode 100644
index 0000000000..79a20f30fc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/javascript-url-yes.https.html.headers
@@ -0,0 +1 @@
+Origin-Agent-Cluster: ?1
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/removed-iframe.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/removed-iframe.sub.https.html
new file mode 100644
index 0000000000..fcf5068908
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/removed-iframe.sub.https.html
@@ -0,0 +1,27 @@
+
+
+window.originAgentCluster for a removed frame
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/removed-iframe.sub.https.html.headers b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/removed-iframe.sub.https.html.headers
new file mode 100644
index 0000000000..79a20f30fc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/removed-iframe.sub.https.html.headers
@@ -0,0 +1 @@
+Origin-Agent-Cluster: ?1
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/resources/data-to-javascript-test.mjs b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/resources/data-to-javascript-test.mjs
new file mode 100644
index 0000000000..3a88253ee3
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/resources/data-to-javascript-test.mjs
@@ -0,0 +1,33 @@
+import { insertCustomIframe, testSupportScript } from "./helpers.mjs";
+import { waitForIframe, testGetter } from "../../resources/helpers.mjs";
+
+const testSupportScriptSuitableForNesting =
+  testSupportScript.replace('', '');
+
+export default () => {
+  promise_setup(async () => {
+    const jsURL = `javascript:'${testSupportScript}'`;
+    const iframe = await insertCustomIframe(`data:text/html,
+      Start page
+      
+    `);
+
+    const waitPromise = waitForIframe(iframe, "javascript: URL");
+
+    // Kick off the navigation. We can't do it directly because only same-origin
+    // pages can navigate to a javascript: URL, and we're not same-origin with
+    // a data: URL.
+    iframe.contentWindow.postMessage(undefined, "*");
+
+    await waitPromise;
+  });
+
+  // The javascript: URL iframe inherits its origin from the previous occupant
+  // of the iframe, which is a data: URL, so it should always be true.
+
+  testGetter(0, true);
+};
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/resources/data-url-test.mjs b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/resources/data-url-test.mjs
new file mode 100644
index 0000000000..1a9b3be47f
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/resources/data-url-test.mjs
@@ -0,0 +1,13 @@
+import { insertCustomIframe, testSupportScript } from "./helpers.mjs";
+import { testGetter } from "../../resources/helpers.mjs";
+
+export default () => {
+  promise_setup(() => {
+    return insertCustomIframe(`data:text/html,${testSupportScript}`);
+  });
+
+  // The data: URL iframe has an opaque origin, so it should return true, since
+  // for them site === origin so they are always origin-keyed.
+
+  testGetter(0, true, "data: URL child");
+};
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/resources/helpers.mjs b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/resources/helpers.mjs
new file mode 100644
index 0000000000..4610ffcad0
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/resources/helpers.mjs
@@ -0,0 +1,28 @@
+import { waitForIframe } from "../../resources/helpers.mjs";
+
+/**
+ * Inserts an iframe, not specialized for origin-keyed agent cluster testing,
+ * pointing to a custom URL. This is just a wrapper to remove some boilerplate.
+ * @param {string} src - The src="" value for the iframe
+ */
+export async function insertCustomIframe(src) {
+  const iframe = document.createElement("iframe");
+  iframe.src = src;
+
+  const waitPromise = waitForIframe(iframe);
+  document.body.append(iframe);
+  await waitPromise;
+
+  return iframe;
+}
+
+/**
+ * This is the part of send-oac-header.py that allows us to reuse testGetter.
+ */
+export const testSupportScript = `
+  
+`;
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/resources/javascript-url-test.mjs b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/resources/javascript-url-test.mjs
new file mode 100644
index 0000000000..de474d8caf
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/resources/javascript-url-test.mjs
@@ -0,0 +1,14 @@
+import { insertCustomIframe, testSupportScript } from "./helpers.mjs";
+import { testGetter } from "../../resources/helpers.mjs";
+
+export default ({ expected }) => {
+  promise_setup(() => {
+    return insertCustomIframe(`javascript:'${testSupportScript}'`);
+  });
+
+  // The javascript: URL iframe inherits its origin from the previous occupant
+  // of the iframe, which is about:blank, which in turn inherits from the
+  // parent. So, the caller needs to tell us what to expect.
+
+  testGetter(0, expected);
+};
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/resources/sandboxed-iframe-test.sub.mjs b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/resources/sandboxed-iframe-test.sub.mjs
new file mode 100644
index 0000000000..9357df00c5
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/resources/sandboxed-iframe-test.sub.mjs
@@ -0,0 +1,20 @@
+import {
+  navigateIframe,
+  testGetter
+} from "../../resources/helpers.mjs";
+
+export default () => {
+  // We do this manually instead of using insertIframe because we want to add a
+  // sandbox="" attribute and we don't want to set both document.domains.
+  promise_setup(() => {
+    const iframe = document.createElement("iframe");
+    iframe.sandbox = "allow-scripts";
+    const navigatePromise = navigateIframe(iframe, "{{hosts[][]}}", "?1");
+    document.body.append(iframe);
+    return navigatePromise;
+  });
+
+  // Sandboxed iframes have an opaque origin, so it should return true, since
+  // for them site === origin so they are always origin-keyed.
+  testGetter(0, true);
+};
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/resources/sandboxed-same-origin-iframe-test.sub.mjs b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/resources/sandboxed-same-origin-iframe-test.sub.mjs
new file mode 100644
index 0000000000..272f805870
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/resources/sandboxed-same-origin-iframe-test.sub.mjs
@@ -0,0 +1,20 @@
+import {
+  navigateIframe,
+  testGetter
+} from "../../resources/helpers.mjs";
+
+export default ({ expected }) => {
+  // We do this manually instead of using insertIframe because we want to add a
+  // sandbox="" attribute and we don't want to set both document.domains.
+  promise_setup(() => {
+    const iframe = document.createElement("iframe");
+    iframe.sandbox = "allow-scripts allow-same-origin";
+    const navigatePromise = navigateIframe(iframe, "{{hosts[][]}}", "?1");
+    document.body.append(iframe);
+    return navigatePromise;
+  });
+
+  // Since the allow-same-origin token is set, this should behave like a normal
+  // iframe, and follow the embedder.
+  testGetter(0, expected);
+};
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/sandboxed-iframe-no.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/sandboxed-iframe-no.https.html
new file mode 100644
index 0000000000..29758a17b8
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/sandboxed-iframe-no.https.html
@@ -0,0 +1,12 @@
+
+
+window.originAgentCluster for a sandboxed iframe on a site-keyed page
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/sandboxed-iframe-yes.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/sandboxed-iframe-yes.https.html
new file mode 100644
index 0000000000..5eb5d08d10
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/sandboxed-iframe-yes.https.html
@@ -0,0 +1,12 @@
+
+
+window.originAgentCluster for a sandboxed iframe on an origin-keyed page
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/sandboxed-iframe-yes.https.html.headers b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/sandboxed-iframe-yes.https.html.headers
new file mode 100644
index 0000000000..79a20f30fc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/sandboxed-iframe-yes.https.html.headers
@@ -0,0 +1 @@
+Origin-Agent-Cluster: ?1
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/sandboxed-same-origin-iframe-no.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/sandboxed-same-origin-iframe-no.https.html
new file mode 100644
index 0000000000..3ed4096f39
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/sandboxed-same-origin-iframe-no.https.html
@@ -0,0 +1,12 @@
+
+
+window.originAgentCluster for a sandboxed, but same-origin, iframe on a site-keyed page
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/sandboxed-same-origin-iframe-yes.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/sandboxed-same-origin-iframe-yes.https.html
new file mode 100644
index 0000000000..c7ea5f0693
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/sandboxed-same-origin-iframe-yes.https.html
@@ -0,0 +1,12 @@
+
+
+window.originAgentCluster for a sandboxed, but same-origin, iframe on an origin-keyed page
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/sandboxed-same-origin-iframe-yes.https.html.headers b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/sandboxed-same-origin-iframe-yes.https.html.headers
new file mode 100644
index 0000000000..79a20f30fc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/getter-special-cases/sandboxed-same-origin-iframe-yes.https.html.headers
@@ -0,0 +1 @@
+Origin-Agent-Cluster: ?1
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/going-back.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/going-back.sub.https.html
new file mode 100644
index 0000000000..a593619ea6
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/going-back.sub.https.html
@@ -0,0 +1,62 @@
+
+
+Parent is origin-keyed, child1 is site-keyed, child1 navigates to a different site, child2 gets inserted and is origin-keyed, child1 navigates back
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/going-back.sub.https.html.headers b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/going-back.sub.https.html.headers
new file mode 100644
index 0000000000..79a20f30fc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/going-back.sub.https.html.headers
@@ -0,0 +1 @@
+Origin-Agent-Cluster: ?1
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/iframe-navigation/parent-no-1-no-same-2-yes-port.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/iframe-navigation/parent-no-1-no-same-2-yes-port.sub.https.html
new file mode 100644
index 0000000000..8237f2f23f
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/iframe-navigation/parent-no-1-no-same-2-yes-port.sub.https.html
@@ -0,0 +1,41 @@
+
+
+Parent is site-keyed, navigate a frame from same-origin site-keyed to different-origin (different-port) origin-keyed
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/iframe-navigation/parent-no-1-no-same-2-yes-subdomain.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/iframe-navigation/parent-no-1-no-same-2-yes-subdomain.sub.https.html
new file mode 100644
index 0000000000..00d8c3164a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/iframe-navigation/parent-no-1-no-same-2-yes-subdomain.sub.https.html
@@ -0,0 +1,41 @@
+
+
+Parent is site-keyed, navigate a frame from same-origin site-keyed to different-origin (subdomain) origin-keyed
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/iframe-navigation/parent-no-1-no-subdomain-2-yes-subdomain.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/iframe-navigation/parent-no-1-no-subdomain-2-yes-subdomain.sub.https.html
new file mode 100644
index 0000000000..803e684e1c
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/iframe-navigation/parent-no-1-no-subdomain-2-yes-subdomain.sub.https.html
@@ -0,0 +1,40 @@
+
+
+Parent is site-keyed, navigate a frame from a subdomain site-keyed to the same subdomain origin-keyed
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/iframe-navigation/parent-no-1-no-subdomain-2-yes-subdomain2.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/iframe-navigation/parent-no-1-no-subdomain-2-yes-subdomain2.sub.https.html
new file mode 100644
index 0000000000..b96d10afd1
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/iframe-navigation/parent-no-1-no-subdomain-2-yes-subdomain2.sub.https.html
@@ -0,0 +1,41 @@
+
+
+Parent is site-keyed, navigate a frame from a subdomain site-keyed to a second-subdomain origin-keyed
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/iframe-navigation/parent-no-1-subdomain-yes-2-subdomain2-no.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/iframe-navigation/parent-no-1-subdomain-yes-2-subdomain2-no.sub.https.html
new file mode 100644
index 0000000000..a70ed56670
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/iframe-navigation/parent-no-1-subdomain-yes-2-subdomain2-no.sub.https.html
@@ -0,0 +1,43 @@
+
+
+Parent is site-keyed, navigate a frame from a subdomain origin-keyed to a second-subdomain site-keyed
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/iframe-navigation/parent-no-1-yes-subdomain-2-no-subdomain.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/iframe-navigation/parent-no-1-yes-subdomain-2-no-subdomain.sub.https.html
new file mode 100644
index 0000000000..38e2630128
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/iframe-navigation/parent-no-1-yes-subdomain-2-no-subdomain.sub.https.html
@@ -0,0 +1,41 @@
+
+
+Parent is site-keyed, navigate a frame from a subdomain origin-keyed to the same subdomain site-keyed
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/iframe-navigation/parent-yes-1-no-same-2-no-port.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/iframe-navigation/parent-yes-1-no-same-2-no-port.sub.https.html
new file mode 100644
index 0000000000..6211845be1
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/iframe-navigation/parent-yes-1-no-same-2-no-port.sub.https.html
@@ -0,0 +1,41 @@
+
+
+Parent is origin-keyed, navigate a frame from same-origin site-keyed to different-origin (different-port) origin-keyed
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/iframe-navigation/parent-yes-1-no-same-2-no-port.sub.https.html.headers b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/iframe-navigation/parent-yes-1-no-same-2-no-port.sub.https.html.headers
new file mode 100644
index 0000000000..79a20f30fc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/iframe-navigation/parent-yes-1-no-same-2-no-port.sub.https.html.headers
@@ -0,0 +1 @@
+Origin-Agent-Cluster: ?1
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/iframe-navigation/parent-yes-1-no-same-2-no-subdomain.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/iframe-navigation/parent-yes-1-no-same-2-no-subdomain.sub.https.html
new file mode 100644
index 0000000000..ead56754a7
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/iframe-navigation/parent-yes-1-no-same-2-no-subdomain.sub.https.html
@@ -0,0 +1,41 @@
+
+
+Parent is origin-keyed, navigate a frame from same-origin site-keyed to different-origin (subdomain) origin-keyed
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/iframe-navigation/parent-yes-1-no-same-2-no-subdomain.sub.https.html.headers b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/iframe-navigation/parent-yes-1-no-same-2-no-subdomain.sub.https.html.headers
new file mode 100644
index 0000000000..79a20f30fc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/iframe-navigation/parent-yes-1-no-same-2-no-subdomain.sub.https.html.headers
@@ -0,0 +1 @@
+Origin-Agent-Cluster: ?1
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/insecure-http.sub.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/insecure-http.sub.html
new file mode 100644
index 0000000000..6f9e5d8b73
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/insecure-http.sub.html
@@ -0,0 +1,26 @@
+
+
+Parent requests origin-keying, child requests origin-keying, child is a subdomain of the parent, but all over insecure HTTP
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/insecure-http.sub.html.headers b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/insecure-http.sub.html.headers
new file mode 100644
index 0000000000..79a20f30fc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/insecure-http.sub.html.headers
@@ -0,0 +1 @@
+Origin-Agent-Cluster: ?1
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups-crash.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups-crash.https.html
new file mode 100644
index 0000000000..dcfb5eb277
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups-crash.https.html
@@ -0,0 +1,9 @@
+
+
+Crash test for https://crbug.com/1099718
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups/opener-no-openee-yes-port.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups/opener-no-openee-yes-port.sub.https.html
new file mode 100644
index 0000000000..a0bf569b12
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups/opener-no-openee-yes-port.sub.https.html
@@ -0,0 +1,28 @@
+
+
+Opener is site-keyed, openee is origin-keyed, openee is different-origin to the opener because of a port mismatch
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups/opener-no-openee-yes-same.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups/opener-no-openee-yes-same.sub.https.html
new file mode 100644
index 0000000000..196dff1449
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups/opener-no-openee-yes-same.sub.https.html
@@ -0,0 +1,27 @@
+
+
+Opener is site-keyed, openee is origin-keyed, openee is same-origin to the opener
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups/opener-no-openee-yes-subdomain.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups/opener-no-openee-yes-subdomain.sub.https.html
new file mode 100644
index 0000000000..f96d2273d5
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups/opener-no-openee-yes-subdomain.sub.https.html
@@ -0,0 +1,28 @@
+
+
+Opener is site-keyed, openee is origin-keyed, openee is a subdomain of the opener
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups/opener-yes-openee-no-port.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups/opener-yes-openee-no-port.sub.https.html
new file mode 100644
index 0000000000..51c5a208c5
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups/opener-yes-openee-no-port.sub.https.html
@@ -0,0 +1,28 @@
+
+
+Opener is origin-keyed, openee is site-keyed, openee is different-origin to the opener because of a port mismatch
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups/opener-yes-openee-no-port.sub.https.html.headers b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups/opener-yes-openee-no-port.sub.https.html.headers
new file mode 100644
index 0000000000..79a20f30fc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups/opener-yes-openee-no-port.sub.https.html.headers
@@ -0,0 +1 @@
+Origin-Agent-Cluster: ?1
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups/opener-yes-openee-no-same.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups/opener-yes-openee-no-same.sub.https.html
new file mode 100644
index 0000000000..562ab40c68
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups/opener-yes-openee-no-same.sub.https.html
@@ -0,0 +1,27 @@
+
+
+Opener is origin-keyed, openee is site-keyed, openee is same-origin to the opener
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups/opener-yes-openee-no-same.sub.https.html.headers b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups/opener-yes-openee-no-same.sub.https.html.headers
new file mode 100644
index 0000000000..79a20f30fc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups/opener-yes-openee-no-same.sub.https.html.headers
@@ -0,0 +1 @@
+Origin-Agent-Cluster: ?1
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups/opener-yes-openee-no-subdomain.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups/opener-yes-openee-no-subdomain.sub.https.html
new file mode 100644
index 0000000000..d7d4791459
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups/opener-yes-openee-no-subdomain.sub.https.html
@@ -0,0 +1,28 @@
+
+
+Opener is origin-keyed, openee is site-keyed, openee is a subdomain of the opener
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups/opener-yes-openee-no-subdomain.sub.https.html.headers b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups/opener-yes-openee-no-subdomain.sub.https.html.headers
new file mode 100644
index 0000000000..79a20f30fc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups/opener-yes-openee-no-subdomain.sub.https.html.headers
@@ -0,0 +1 @@
+Origin-Agent-Cluster: ?1
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups/opener-yes-openee-yes-port.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups/opener-yes-openee-yes-port.sub.https.html
new file mode 100644
index 0000000000..32a5066d2e
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups/opener-yes-openee-yes-port.sub.https.html
@@ -0,0 +1,28 @@
+
+
+Opener is origin-keyed, openee is origin-keyed, openee is different-origin to the opener because of a port mismatch
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups/opener-yes-openee-yes-port.sub.https.html.headers b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups/opener-yes-openee-yes-port.sub.https.html.headers
new file mode 100644
index 0000000000..79a20f30fc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups/opener-yes-openee-yes-port.sub.https.html.headers
@@ -0,0 +1 @@
+Origin-Agent-Cluster: ?1
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups/opener-yes-openee-yes-same.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups/opener-yes-openee-yes-same.sub.https.html
new file mode 100644
index 0000000000..a85decac3c
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups/opener-yes-openee-yes-same.sub.https.html
@@ -0,0 +1,27 @@
+
+
+Opener is origin-keyed, openee is origin-keyed, openee is same-origin to the opener
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups/opener-yes-openee-yes-same.sub.https.html.headers b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups/opener-yes-openee-yes-same.sub.https.html.headers
new file mode 100644
index 0000000000..79a20f30fc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups/opener-yes-openee-yes-same.sub.https.html.headers
@@ -0,0 +1 @@
+Origin-Agent-Cluster: ?1
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups/opener-yes-openee-yes-subdomain.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups/opener-yes-openee-yes-subdomain.sub.https.html
new file mode 100644
index 0000000000..148b39af23
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups/opener-yes-openee-yes-subdomain.sub.https.html
@@ -0,0 +1,28 @@
+
+
+Opener is origin-keyed, openee is origin-keyed, openee is a subdomain of the opener
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups/opener-yes-openee-yes-subdomain.sub.https.html.headers b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups/opener-yes-openee-yes-subdomain.sub.https.html.headers
new file mode 100644
index 0000000000..79a20f30fc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/popups/opener-yes-openee-yes-subdomain.sub.https.html.headers
@@ -0,0 +1 @@
+Origin-Agent-Cluster: ?1
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/regression-1399759.https.sub.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/regression-1399759.https.sub.html
new file mode 100644
index 0000000000..d0b09f335d
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/regression-1399759.https.sub.html
@@ -0,0 +1,100 @@
+
+
+
+
+
+Origin-Isolation after navigating about:blank.
+
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/removing-iframes.sub.https.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/removing-iframes.sub.https.html
new file mode 100644
index 0000000000..b83aa9f5be
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/removing-iframes.sub.https.html
@@ -0,0 +1,46 @@
+
+
+A site-keyed child at a given origin causes future children to also be site-keyed even after the iframe is removed
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/removing-iframes.sub.https.html.headers b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/removing-iframes.sub.https.html.headers
new file mode 100644
index 0000000000..79a20f30fc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/removing-iframes.sub.https.html.headers
@@ -0,0 +1 @@
+Origin-Agent-Cluster: ?1
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/resources/README.md b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/resources/README.md
new file mode 100644
index 0000000000..9292fe3894
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/resources/README.md
@@ -0,0 +1,6 @@
+Why are there `.headers` files here for the `.mjs` scripts?
+
+Because `../getter-special-cases/sandboxed-iframe.sub.https.html` is testing an
+opaque origin, which is cross-origin with these scripts. Since
+`
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/resources/coep-frame.html.headers b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/resources/coep-frame.html.headers
new file mode 100644
index 0000000000..4e798cd9f5
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/resources/coep-frame.html.headers
@@ -0,0 +1,2 @@
+Cross-Origin-Embedder-Policy: require-corp
+Cross-Origin-Resource-Policy: cross-origin
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/resources/crashy-popup.sub.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/resources/crashy-popup.sub.html
new file mode 100644
index 0000000000..45c8d5074d
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/resources/crashy-popup.sub.html
@@ -0,0 +1,6 @@
+
+
+This page helps exhibit a crash bug when window.open()ed (see ../popups-crash.https.html)
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/resources/crashy-popup.sub.html.headers b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/resources/crashy-popup.sub.html.headers
new file mode 100644
index 0000000000..79a20f30fc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/resources/crashy-popup.sub.html.headers
@@ -0,0 +1 @@
+Origin-Agent-Cluster: ?1
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/resources/frame.html b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/resources/frame.html
new file mode 100644
index 0000000000..537de07b14
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/resources/frame.html
@@ -0,0 +1,12 @@
+
+
+A frame included by a test page
+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/resources/frame.html.headers b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/resources/frame.html.headers
new file mode 100644
index 0000000000..79a20f30fc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/resources/frame.html.headers
@@ -0,0 +1 @@
+Origin-Agent-Cluster: ?1
diff --git a/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/resources/helpers.mjs b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/resources/helpers.mjs
new file mode 100644
index 0000000000..6bad76e3d9
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/origin-keyed-agent-clusters/resources/helpers.mjs
@@ -0,0 +1,390 @@
+/**
+ * Inserts an iframe usable for origin-keyed agent cluster testing, and returns
+ * a promise fulfilled when the iframe is loaded and its document.domain is set.
+ * The iframe will point to the send-oac-header.py file, on the  designated
+ * host.
+ * @param {string} host - The host used to calculate the iframe's src=""
+ * @param {string=} header - The value of the Origin-Agent-Cluster header that
+ *   the iframe will set. Omit this to set no header.
+ * @param {object=} options - Rarely-used options.
+ * @param {boolean=} options.redirectFirst - Whether to do a 302 redirect first
+ *   before arriving at the page that sets the header. The redirecting page will
+ *   not set the Origin-Agent-Cluster header.
+ * @returns {HTMLIFrameElement} The created iframe element
+ */
+export async function insertIframe(host, header, { redirectFirst = false } = {}) {
+  const iframe = document.createElement("iframe");
+  const navigatePromise = navigateIframe(iframe, host, header, { redirectFirst });
+  document.body.append(iframe);
+  await navigatePromise;
+  await setBothDocumentDomains(iframe.contentWindow);
+  return iframe;
+}
+
+/**
+ * Navigates an iframe to a page for origin-keyed agent cluster testing, similar
+ * to insertIframe but operating on an existing iframe.
+ * @param {HTMLIFrameElement} iframeEl - The 
+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/origin/relaxing-the-same-origin-restriction/document_domain_setter_srcdoc.html b/testing/web-platform/tests/html/browsers/origin/relaxing-the-same-origin-restriction/document_domain_setter_srcdoc.html
new file mode 100644
index 0000000000..65a7f5c898
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/relaxing-the-same-origin-restriction/document_domain_setter_srcdoc.html
@@ -0,0 +1,84 @@
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/relaxing-the-same-origin-restriction/sandboxed-document_domain.html b/testing/web-platform/tests/html/browsers/origin/relaxing-the-same-origin-restriction/sandboxed-document_domain.html
new file mode 100644
index 0000000000..ae1a0ccd56
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/relaxing-the-same-origin-restriction/sandboxed-document_domain.html
@@ -0,0 +1,21 @@
+
+Sandboxed document.domain
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/relaxing-the-same-origin-restriction/sandboxed-document_domain.html.headers b/testing/web-platform/tests/html/browsers/origin/relaxing-the-same-origin-restriction/sandboxed-document_domain.html.headers
new file mode 100644
index 0000000000..82e8023d0b
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/relaxing-the-same-origin-restriction/sandboxed-document_domain.html.headers
@@ -0,0 +1 @@
+Content-Security-Policy: sandbox allow-scripts allow-same-origin
diff --git a/testing/web-platform/tests/html/browsers/origin/relaxing-the-same-origin-restriction/support/document_domain_frame.html b/testing/web-platform/tests/html/browsers/origin/relaxing-the-same-origin-restriction/support/document_domain_frame.html
new file mode 100644
index 0000000000..61f54af359
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/relaxing-the-same-origin-restriction/support/document_domain_frame.html
@@ -0,0 +1,52 @@
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/origin/relaxing-the-same-origin-restriction/support/document_domain_frame.sub.js b/testing/web-platform/tests/html/browsers/origin/relaxing-the-same-origin-restriction/support/document_domain_frame.sub.js
new file mode 100644
index 0000000000..b6631ea4f1
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/relaxing-the-same-origin-restriction/support/document_domain_frame.sub.js
@@ -0,0 +1,65 @@
+/**
+ * Utilities to be used with document_domain_frame.html.
+ */
+
+/**
+ * Send a message to the frame and resolve a promise when a response is received.
+ *
+ * Supported messages:
+ *
+ * 1) { domain: something }.  Has the subframe try to set document.domain to the
+ * given value, and message back 'Done' if that succeeds or an error name if it
+ * fails.
+ *
+ * 2) 'poke-at-parent'.  Has the subframe try to synchronously attempt to access
+ * the parent's DOM, read out a string value, and message it back to the parent.
+ * Again, sends back the error name if that fails.
+ *
+ * 3) { 'poke-at-sibling': name }.  Has the subframe try to synchronously
+ * attempt to access the DOM of the sibling with the given name, read out a
+ * string value, and message it back to the parent.
+ */
+function postMessageToFrame(frame, message) {
+  return new Promise(resolve => {
+    var c = new MessageChannel();
+    c.port1.onmessage = e => {
+      resolve({ data: e.data, frame: frame })
+    };
+    frame.contentWindow.postMessage(message, '*', [c.port2]);
+  });
+}
+
+/**
+ * Create a frame that loads document_domain_frame.html and resolves a promise
+ * when the frame is loaded enough to be sending and receiving messages.
+ *
+ * If a "name" argument is provided, that name is used for the iframe, so
+ *
+ * If a "hostname" argument is provided, that hostname is used for the load, to
+ * allow testing details of the behavior when different sorts of hostnames are
+ * used.
+ */
+function createFrame(t, name, hostname) {
+  return new Promise(resolve => {
+    var i = document.createElement('iframe');
+    if (hostname) {
+      i.src = `//${hostname}:{{location[port]}}/html/browsers/origin/relaxing-the-same-origin-restriction/support/document_domain_frame.html`;
+    } else {
+      i.src = "support/document_domain_frame.html";
+    }
+    if (name) {
+      i.name = name;
+    }
+    var listener = m => {
+      if (m.source == i.contentWindow)
+        resolve(i);
+    }
+    window.addEventListener('message', listener);
+    t.add_cleanup(() => {
+      i.remove();
+      window.removeEventListener('message', listener);
+    });
+    document.body.appendChild(i);
+  });
+}
+
diff --git a/testing/web-platform/tests/html/browsers/origin/relaxing-the-same-origin-restriction/support/document_domain_setter_iframe.html b/testing/web-platform/tests/html/browsers/origin/relaxing-the-same-origin-restriction/support/document_domain_setter_iframe.html
new file mode 100644
index 0000000000..d3d5260af3
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/origin/relaxing-the-same-origin-restriction/support/document_domain_setter_iframe.html
@@ -0,0 +1,12 @@
+
+
+  
+    
+    
+    
+  
+  
+  
+
diff --git a/testing/web-platform/tests/html/browsers/sandboxing/inner-iframe.html b/testing/web-platform/tests/html/browsers/sandboxing/inner-iframe.html
new file mode 100644
index 0000000000..229f6b3d85
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/sandboxing/inner-iframe.html
@@ -0,0 +1,13 @@
+
+
+  
+  
+  
+  
+    
foo

+  
+
diff --git a/testing/web-platform/tests/html/browsers/sandboxing/noscript-iframe.html b/testing/web-platform/tests/html/browsers/sandboxing/noscript-iframe.html
new file mode 100644
index 0000000000..677b5fc83a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/sandboxing/noscript-iframe.html
@@ -0,0 +1,3 @@
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/sandboxing/popup-from-initial-empty-sandboxed-document.window.js b/testing/web-platform/tests/html/browsers/sandboxing/popup-from-initial-empty-sandboxed-document.window.js
new file mode 100644
index 0000000000..1ae4fad0cb
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/sandboxing/popup-from-initial-empty-sandboxed-document.window.js
@@ -0,0 +1,46 @@
+// META: timeout=long
+// META: script=/common/utils.js
+// META: script=/common/dispatcher/dispatcher.js
+
+// Regression test for: https://crbug.com/1256822.
+//
+// From a sandboxed iframe allowing popups, scripts, and same-origin. Open a
+// popup using the WindowProxy of a new iframe that is still on the initial
+// empty document. Check that the sandbox flags are properly inherited.
+
+// Return true if the execution context is sandboxed.
+const isSandboxed = () => {
+  try {
+    // Setting document.domain in sandboxed document throw errors.
+    document.domain = document.domain;
+    return false;
+  } catch (error) {
+    return true;
+  }
+}
+
+promise_test(async test => {
+  // 1. Create a sandboxed iframe, allowing popups, same-origin and scripts.
+  const iframe_token = token();
+  const iframe_document = new RemoteContext(iframe_token);
+  const iframe_url = remoteExecutorUrl(iframe_token);
+  const iframe = document.createElement("iframe");
+  iframe.sandbox = "allow-same-origin allow-scripts allow-popups";
+  iframe.src = iframe_url;
+  document.body.appendChild(iframe);
+  assert_true(await iframe_document.execute_script(isSandboxed),
+    "iframe is sandboxed");
+
+  // 2. From the sandboxed iframe, create an empty iframe, and open a popup
+  //    using it's WindowProxy. The popup must inherit sandbox flags.
+  const popup_token = token();
+  const popup_document = new RemoteContext(popup_token);
+  const popup_url = remoteExecutorUrl(popup_token);
+  iframe_document.execute_script((popup_url) => {
+    let iframe = document.createElement("iframe");
+    iframe.name = "iframe_name";
+    document.body.appendChild(iframe);
+    iframe_name.open(popup_url);
+  }, [popup_url.href]);
+  assert_true(await popup_document.execute_script(isSandboxed), "popup is sandboxed");
+});
diff --git a/testing/web-platform/tests/html/browsers/sandboxing/resources/check-sandbox-flags.html b/testing/web-platform/tests/html/browsers/sandboxing/resources/check-sandbox-flags.html
new file mode 100644
index 0000000000..0dc95315f1
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/sandboxing/resources/check-sandbox-flags.html
@@ -0,0 +1,8 @@
+
diff --git a/testing/web-platform/tests/html/browsers/sandboxing/resources/document-open.html b/testing/web-platform/tests/html/browsers/sandboxing/resources/document-open.html
new file mode 100644
index 0000000000..136c494d5a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/sandboxing/resources/document-open.html
@@ -0,0 +1,14 @@
+
diff --git a/testing/web-platform/tests/html/browsers/sandboxing/resources/execute-postmessage.html b/testing/web-platform/tests/html/browsers/sandboxing/resources/execute-postmessage.html
new file mode 100644
index 0000000000..89bd268f9c
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/sandboxing/resources/execute-postmessage.html
@@ -0,0 +1,5 @@
+
diff --git a/testing/web-platform/tests/html/browsers/sandboxing/resources/post-done-to-opener.html b/testing/web-platform/tests/html/browsers/sandboxing/resources/post-done-to-opener.html
new file mode 100644
index 0000000000..b47f0f274e
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/sandboxing/resources/post-done-to-opener.html
@@ -0,0 +1,3 @@
+
diff --git a/testing/web-platform/tests/html/browsers/sandboxing/resources/sandbox-inherited-from-initiator-response-helper.html b/testing/web-platform/tests/html/browsers/sandboxing/resources/sandbox-inherited-from-initiator-response-helper.html
new file mode 100644
index 0000000000..29c7f12441
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/sandboxing/resources/sandbox-inherited-from-initiator-response-helper.html
@@ -0,0 +1,15 @@
+
diff --git a/testing/web-platform/tests/html/browsers/sandboxing/resources/sandbox-inherited-from-initiator-response-helper.html.headers b/testing/web-platform/tests/html/browsers/sandboxing/resources/sandbox-inherited-from-initiator-response-helper.html.headers
new file mode 100644
index 0000000000..82e8023d0b
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/sandboxing/resources/sandbox-inherited-from-initiator-response-helper.html.headers
@@ -0,0 +1 @@
+Content-Security-Policy: sandbox allow-scripts allow-same-origin
diff --git a/testing/web-platform/tests/html/browsers/sandboxing/resources/sandbox-javascript-window-open.html b/testing/web-platform/tests/html/browsers/sandboxing/resources/sandbox-javascript-window-open.html
new file mode 100644
index 0000000000..909956a54f
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/sandboxing/resources/sandbox-javascript-window-open.html
@@ -0,0 +1,18 @@
+
diff --git a/testing/web-platform/tests/html/browsers/sandboxing/sandbox-allow-same-origin.html b/testing/web-platform/tests/html/browsers/sandboxing/sandbox-allow-same-origin.html
new file mode 100644
index 0000000000..d6b3b099f2
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/sandboxing/sandbox-allow-same-origin.html
@@ -0,0 +1,30 @@
+
+
+  
+    DOM access in sandbox="allow-same-origin" iframe
+    
+    
+    
+    
+  
+
+  
+    
DOM access in sandbox="allow-same-origin" iframe

+    
+
+    
+
+    

+  
+
diff --git a/testing/web-platform/tests/html/browsers/sandboxing/sandbox-allow-scripts.html b/testing/web-platform/tests/html/browsers/sandboxing/sandbox-allow-scripts.html
new file mode 100644
index 0000000000..6cf3f5a4a8
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/sandboxing/sandbox-allow-scripts.html
@@ -0,0 +1,29 @@
+
+
+  
+    Script execution in sandbox="allow-scripts" iframe
+    
+    
+    
+    
+  
+
+  
+    
Script execution in sandbox="allow-scripts" iframe

+    
+
+    
+
+    

+  
+
diff --git a/testing/web-platform/tests/html/browsers/sandboxing/sandbox-disallow-popups.html b/testing/web-platform/tests/html/browsers/sandboxing/sandbox-disallow-popups.html
new file mode 100644
index 0000000000..8e4b34eb8b
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/sandboxing/sandbox-disallow-popups.html
@@ -0,0 +1,39 @@
+
+
+window.open in sandbox iframe
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/sandboxing/sandbox-disallow-same-origin.html b/testing/web-platform/tests/html/browsers/sandboxing/sandbox-disallow-same-origin.html
new file mode 100644
index 0000000000..0dae0137ac
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/sandboxing/sandbox-disallow-same-origin.html
@@ -0,0 +1,35 @@
+
+
+  
+    Access to sandbox iframe
+    
+    
+    
+    
+    
+  
+
+  
+    
Access to sandbox iframe

+    
+
+    
+  
+
+    

+
diff --git a/testing/web-platform/tests/html/browsers/sandboxing/sandbox-disallow-scripts-via-unsandboxed-popup.tentative.html b/testing/web-platform/tests/html/browsers/sandboxing/sandbox-disallow-scripts-via-unsandboxed-popup.tentative.html
new file mode 100644
index 0000000000..3c8c0b346a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/sandboxing/sandbox-disallow-scripts-via-unsandboxed-popup.tentative.html
@@ -0,0 +1,33 @@
+
+
+
+
+  
+
diff --git a/testing/web-platform/tests/html/browsers/sandboxing/sandbox-disallow-scripts.html b/testing/web-platform/tests/html/browsers/sandboxing/sandbox-disallow-scripts.html
new file mode 100644
index 0000000000..1bc116ada4
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/sandboxing/sandbox-disallow-scripts.html
@@ -0,0 +1,29 @@
+
+
+  
+    Script execution in sandbox iframe
+    
+    
+    
+    
+  
+
+  
+    
Script execution in sandbox iframe

+    
+
+    
+
+    

+  
+
diff --git a/testing/web-platform/tests/html/browsers/sandboxing/sandbox-document-open-mutation.window.js b/testing/web-platform/tests/html/browsers/sandboxing/sandbox-document-open-mutation.window.js
new file mode 100644
index 0000000000..713ca612c5
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/sandboxing/sandbox-document-open-mutation.window.js
@@ -0,0 +1,37 @@
+// Return whether the current context is sandboxed or not. The implementation do
+// not matter much, but might have to change over time depending on what side
+// effect sandbox flag have. Feel free to update as needed.
+const is_sandboxed = () => {
+  try {
+    document.domain = document.domain;
+    return "not sandboxed";
+  } catch (error) {
+    return "sandboxed";
+  }
+};
+
+promise_test(async test => {
+  const message = new Promise(r => window.addEventListener("message", r));
+
+  const iframe_unsandboxed = document.createElement("iframe");
+  document.body.appendChild(iframe_unsandboxed);
+
+  const iframe_sandboxed = document.createElement("iframe");
+  iframe_sandboxed.sandbox = "allow-same-origin allow-scripts";
+  document.body.appendChild(iframe_sandboxed);
+
+  iframe_sandboxed.srcdoc = `
+    
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/sandboxing/sandbox-inherited-from-initiator-frame.html b/testing/web-platform/tests/html/browsers/sandboxing/sandbox-inherited-from-initiator-frame.html
new file mode 100644
index 0000000000..ab87fce5e0
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/sandboxing/sandbox-inherited-from-initiator-frame.html
@@ -0,0 +1,64 @@
+
+
+Inherit sandbox flags from the initiator's frame
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/sandboxing/sandbox-inherited-from-initiator-response.html b/testing/web-platform/tests/html/browsers/sandboxing/sandbox-inherited-from-initiator-response.html
new file mode 100644
index 0000000000..638f1ba783
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/sandboxing/sandbox-inherited-from-initiator-response.html
@@ -0,0 +1,46 @@
+
+
+Inherit sandbox flags from the initiator's response
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/sandboxing/sandbox-inherited-from-required-csp.html b/testing/web-platform/tests/html/browsers/sandboxing/sandbox-inherited-from-required-csp.html
new file mode 100644
index 0000000000..04f485cc66
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/sandboxing/sandbox-inherited-from-required-csp.html
@@ -0,0 +1,154 @@
+
+
+Inherit sandbox from CSP embedded enforcement
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/sandboxing/sandbox-initial-empty-document-toward-same-origin.html b/testing/web-platform/tests/html/browsers/sandboxing/sandbox-initial-empty-document-toward-same-origin.html
new file mode 100644
index 0000000000..d1306c9703
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/sandboxing/sandbox-initial-empty-document-toward-same-origin.html
@@ -0,0 +1,30 @@
+
+
+
+  Check sandbox-flags inheritance in case of javascript window reuse.
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/sandboxing/sandbox-javascript-window-open.html b/testing/web-platform/tests/html/browsers/sandboxing/sandbox-javascript-window-open.html
new file mode 100644
index 0000000000..fd21e9bb02
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/sandboxing/sandbox-javascript-window-open.html
@@ -0,0 +1,19 @@
+
+
+window.open in sandbox iframe
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/sandboxing/sandbox-navigation-timing-iframe.tentative.html b/testing/web-platform/tests/html/browsers/sandboxing/sandbox-navigation-timing-iframe.tentative.html
new file mode 100644
index 0000000000..43726e7720
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/sandboxing/sandbox-navigation-timing-iframe.tentative.html
@@ -0,0 +1,16 @@
+
+
+
\ No newline at end of file
diff --git a/testing/web-platform/tests/html/browsers/sandboxing/sandbox-navigation-timing.tentative.html b/testing/web-platform/tests/html/browsers/sandboxing/sandbox-navigation-timing.tentative.html
new file mode 100644
index 0000000000..686f1c0c9f
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/sandboxing/sandbox-navigation-timing.tentative.html
@@ -0,0 +1,29 @@
+
+
+Sandbox Navigation Timing
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/sandboxing/sandbox-new-execution-context-iframe.html b/testing/web-platform/tests/html/browsers/sandboxing/sandbox-new-execution-context-iframe.html
new file mode 100644
index 0000000000..801e78f9c0
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/sandboxing/sandbox-new-execution-context-iframe.html
@@ -0,0 +1,5 @@
+
+  
+
diff --git a/testing/web-platform/tests/html/browsers/sandboxing/sandbox-new-execution-context.html b/testing/web-platform/tests/html/browsers/sandboxing/sandbox-new-execution-context.html
new file mode 100644
index 0000000000..dc1953aee6
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/sandboxing/sandbox-new-execution-context.html
@@ -0,0 +1,39 @@
+
+
+  
+    Reuse of iframe about:blank document execution context
+    
+    
+    
+    
+  
+
+  
+    
Reuse of iframe about:blank document execution context in sandbox="allow-scripts" iframe

+    
+    

+  
+
diff --git a/testing/web-platform/tests/html/browsers/sandboxing/sandbox-parse-noscript-ref.html b/testing/web-platform/tests/html/browsers/sandboxing/sandbox-parse-noscript-ref.html
new file mode 100644
index 0000000000..9cf92768f7
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/sandboxing/sandbox-parse-noscript-ref.html
@@ -0,0 +1,6 @@
+
+
+noscript parsing when sandbox disables scripting
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/sandboxing/sandbox-parse-noscript.html b/testing/web-platform/tests/html/browsers/sandboxing/sandbox-parse-noscript.html
new file mode 100644
index 0000000000..bb7ced0a14
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/sandboxing/sandbox-parse-noscript.html
@@ -0,0 +1,7 @@
+
+
+noscript parsing when sandbox disables scripting
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/sandboxing/sandbox-window-open-srcdoc.html b/testing/web-platform/tests/html/browsers/sandboxing/sandbox-window-open-srcdoc.html
new file mode 100644
index 0000000000..6fbff6df82
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/sandboxing/sandbox-window-open-srcdoc.html
@@ -0,0 +1,52 @@
+
+
+window.open("about:srcdoc") from a sandboxed iframe
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/sandboxing/window-open-blank-from-different-initiator.html b/testing/web-platform/tests/html/browsers/sandboxing/window-open-blank-from-different-initiator.html
new file mode 100644
index 0000000000..91817c3db4
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/sandboxing/window-open-blank-from-different-initiator.html
@@ -0,0 +1,90 @@
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/BarProp.window.js b/testing/web-platform/tests/html/browsers/the-window-object/BarProp.window.js
new file mode 100644
index 0000000000..266779ee0b
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/BarProp.window.js
@@ -0,0 +1,59 @@
+function assert_barProps(barPropObjects, visible) {
+  let lastBarProp = undefined;
+  for (const currentBarProp of barPropObjects) {
+    assert_not_equals(currentBarProp, lastBarProp, "BarBrop objects of different properties are identical");
+    assert_equals(currentBarProp.visible, visible, "a BarProp's visible is wrong");
+    lastBarProp = currentBarProp;
+  }
+}
+
+function assert_identical_barProps(barProps, w, oldBarPropObjects, visible) {
+  barProps.map(val => w[val]).map((val, index) => {
+    assert_equals(val, oldBarPropObjects[index], "BarProp identity not preserved");
+  });
+  assert_barProps(oldBarPropObjects, visible);
+}
+
+async_test(t => {
+  const frame = document.body.appendChild(document.createElement("iframe")),
+        frameW = frame.contentWindow,
+        barProps = ["locationbar", "menubar", "personalbar", "scrollbars", "statusbar", "toolbar"],
+        barPropObjects = barProps.map(val => frameW[val]);
+
+  assert_barProps(barPropObjects, true);
+  frame.remove();
+  assert_identical_barProps(barProps, frameW, barPropObjects, false);
+  t.step_timeout(() => {
+    assert_identical_barProps(barProps, frameW, barPropObjects, false);
+    t.done();
+  }, 0);
+}, "BarBrop objects of a nested Window");
+
+async_test(t => {
+  const openee = window.open("/common/blank.html"),
+        barProps = ["locationbar", "menubar", "personalbar", "scrollbars", "statusbar", "toolbar"],
+        barPropObjects = barProps.map(val => openee[val]);
+
+  // This is used to demonstrate that the Document is replaced while the global object (not the
+  // global this object) stays the same
+  openee.tiedToGlobalObject = openee.document;
+
+  assert_barProps(barPropObjects, true);
+  openee.onload = t.step_func(() => {
+    assert_own_property(openee, "tiedToGlobalObject");
+    assert_not_equals(openee.tiedToGlobalObject, openee.document);
+
+    assert_identical_barProps(barProps, openee, barPropObjects, true);
+
+    openee.onpagehide = t.step_func(() => {
+      assert_identical_barProps(barProps, openee, barPropObjects, true);
+      t.step_timeout(() => {
+        assert_identical_barProps(barProps, openee, barPropObjects, false);
+        t.done();
+      }, 0);
+    });
+
+    openee.close();
+    assert_identical_barProps(barProps, openee, barPropObjects, true);
+  });
+}, "BarProp objects of an auxiliary Window");
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/Document-defaultView.html b/testing/web-platform/tests/html/browsers/the-window-object/Document-defaultView.html
new file mode 100644
index 0000000000..dbc75d30b2
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/Document-defaultView.html
@@ -0,0 +1,38 @@
+
+
+Document#defaultView
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/Window-document.html b/testing/web-platform/tests/html/browsers/the-window-object/Window-document.html
new file mode 100644
index 0000000000..9b27f5f7c7
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/Window-document.html
@@ -0,0 +1,25 @@
+
+
+Window#document
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/accessing-other-browsing-contexts/indexed-browsing-contexts-01.html b/testing/web-platform/tests/html/browsers/the-window-object/accessing-other-browsing-contexts/indexed-browsing-contexts-01.html
new file mode 100644
index 0000000000..9710d15fb2
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/accessing-other-browsing-contexts/indexed-browsing-contexts-01.html
@@ -0,0 +1,47 @@
+
+
+HTML Test: the browsing contexts must be sorted in the order that their containers were inserted into the Document
+
+
+
+
+

+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/accessing-other-browsing-contexts/indexed-browsing-contexts-02.html b/testing/web-platform/tests/html/browsers/the-window-object/accessing-other-browsing-contexts/indexed-browsing-contexts-02.html
new file mode 100644
index 0000000000..d09c944fd8
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/accessing-other-browsing-contexts/indexed-browsing-contexts-02.html
@@ -0,0 +1,62 @@
+
+
+  
+  HTML Test: the browsing contexts created by various container elements
+  
+  
+  
+  
+
+
+  

+  

+    
+    
+    
+    
+  

+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/accessing-other-browsing-contexts/indexed-browsing-contexts-03.html b/testing/web-platform/tests/html/browsers/the-window-object/accessing-other-browsing-contexts/indexed-browsing-contexts-03.html
new file mode 100644
index 0000000000..1548891175
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/accessing-other-browsing-contexts/indexed-browsing-contexts-03.html
@@ -0,0 +1,30 @@
+
+
+  
+  HTML Test: indexed property of a Window object
+  
+  
+  
+  
+
+
+  

+  

+    

+    
+    
+  

+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/accessing-other-browsing-contexts/iterator.html b/testing/web-platform/tests/html/browsers/the-window-object/accessing-other-browsing-contexts/iterator.html
new file mode 100644
index 0000000000..76dc7dbae6
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/accessing-other-browsing-contexts/iterator.html
@@ -0,0 +1,11 @@
+
+
+window[@@iterator]
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/accessing-other-browsing-contexts/test1.html b/testing/web-platform/tests/html/browsers/the-window-object/accessing-other-browsing-contexts/test1.html
new file mode 100644
index 0000000000..f85f90f7c6
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/accessing-other-browsing-contexts/test1.html
@@ -0,0 +1,12 @@
+
+
+HTML Test: child browsing contexts created by iframe elements
+
+
+  
+    
+  
+  
+

+      
+    

diff --git a/testing/web-platform/tests/html/browsers/the-window-object/accessing-other-browsing-contexts/test2.html b/testing/web-platform/tests/html/browsers/the-window-object/accessing-other-browsing-contexts/test2.html
new file mode 100644
index 0000000000..d6a16647fe
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/accessing-other-browsing-contexts/test2.html
@@ -0,0 +1,6 @@
+
+
+HTML Test: child browsing contexts created by object and embed elements
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/accessing-other-browsing-contexts/test3.html b/testing/web-platform/tests/html/browsers/the-window-object/accessing-other-browsing-contexts/test3.html
new file mode 100644
index 0000000000..a62fdbaae7
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/accessing-other-browsing-contexts/test3.html
@@ -0,0 +1,8 @@
+
+
+HTML Test: child browsing contexts created by frame elements
+
+
+  
+  
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/accessing-other-browsing-contexts/window_length.html b/testing/web-platform/tests/html/browsers/the-window-object/accessing-other-browsing-contexts/window_length.html
new file mode 100644
index 0000000000..c9559b531a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/accessing-other-browsing-contexts/window_length.html
@@ -0,0 +1,51 @@
+
+window.length
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/close-method.window.js b/testing/web-platform/tests/html/browsers/the-window-object/close-method.window.js
new file mode 100644
index 0000000000..048c5f7236
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/close-method.window.js
@@ -0,0 +1,39 @@
+function assert_closed_opener(w, closed, opener) {
+  assert_equals(w.closed, closed);
+  assert_equals(w.opener, opener);
+}
+
+async_test(t => {
+  const openee = window.open();
+  assert_closed_opener(openee, false, self);
+  openee.onpagehide = t.step_func(() => {
+    assert_closed_opener(openee, true, self);
+    t.step_timeout(() => {
+      assert_closed_opener(openee, true, null);
+      t.done();
+    }, 0);
+  });
+  openee.close();
+  assert_closed_opener(openee, true, self);
+}, "window.close() queues a task to discard, but window.closed knows immediately");
+
+async_test(t => {
+  const openee = window.open("", "greatname");
+  assert_closed_opener(openee, false, self);
+  openee.close();
+  assert_closed_opener(openee, true, self);
+  const openee2 = window.open("", "greatname");
+  assert_not_equals(openee, openee2);
+  assert_closed_opener(openee, true, self); // Ensure second window.open() call was synchronous
+  openee2.onpagehide = t.step_func(() => {
+    assert_closed_opener(openee2, true, self);
+    t.step_timeout(() => {
+      assert_closed_opener(openee, true, null);
+      assert_closed_opener(openee2, true, null);
+      t.done();
+    }, 0);
+  });
+  openee2.close();
+  assert_closed_opener(openee, true, self); // Ensure second close() call was synchronous
+  assert_closed_opener(openee2, true, self);
+}, "window.close() affects name targeting immediately");
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/closed-attribute.window.js b/testing/web-platform/tests/html/browsers/the-window-object/closed-attribute.window.js
new file mode 100644
index 0000000000..88a3beba6f
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/closed-attribute.window.js
@@ -0,0 +1,69 @@
+// META: script=/common/get-host-info.sub.js
+
+function closedTest(newWindow, closeNewWindowsBrowsingContext) {
+  assert_equals(newWindow.closed, false);
+  closeNewWindowsBrowsingContext();
+  assert_equals(newWindow.closed, true);
+}
+
+test(() => {
+  const frame = document.body.appendChild(document.createElement("iframe"));
+  closedTest(frame.contentWindow, () => frame.remove());
+}, "closed and same-origin nested browsing context");
+
+test(() => {
+  const openee = window.open();
+  closedTest(openee, () => openee.close());
+
+  // close() is a no-op once "is closing" is set
+  openee.close();
+  assert_equals(openee.closed, true);
+}, "closed/close() and same-origin auxiliary browsing context");
+
+const support = new URL("support/closed.html", location.href).pathname;
+[
+  {
+    type: "cross-origin",
+    url: `${get_host_info().HTTP_REMOTE_ORIGIN}${support}`
+  },
+  {
+    type: "cross-site",
+    url: `${get_host_info().HTTP_NOTSAMESITE_ORIGIN}${support}`
+  }
+].forEach(val => {
+  async_test(t => {
+    const frame = document.createElement("iframe"),
+          ident = `${val.type}-nested-bc`;
+    frame.src = `${val.url}?window=parent&ident=${ident}`;
+    const listener = t.step_func(e => {
+      if (e.data === ident) {
+        closedTest(frame.contentWindow, () => frame.remove());
+        self.removeEventListener("message", listener);
+        t.done();
+      }
+    });
+    // Use a message event rather than onload for consistency with auxiliary browsing contexts.
+    self.addEventListener("message", listener);
+    document.body.append(frame);
+  }, `closed and ${val.type} nested browsing context`);
+
+  async_test(t => {
+    const ident = `${val.type}-auxiliary-bc`,
+          support = new URL("support/closed.html", location.href).pathname,
+          openee = window.open(`${val.url}?window=opener&ident=${ident}`),
+          listener = t.step_func(e => {
+      if (e.data === ident) {
+        closedTest(openee, () => openee.close());
+
+        // close() is a no-op once "is closing" is set
+        openee.close();
+        assert_equals(openee.closed, true);
+
+        self.removeEventListener("message", listener);
+        t.done();
+      }
+    });
+    // As there's no cross-origin onload, use a message event.
+    self.addEventListener("message", listener);
+  }, `closed/close() and ${val.type} auxiliary browsing context`);
+});
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/defaultstatus.html b/testing/web-platform/tests/html/browsers/the-window-object/defaultstatus.html
new file mode 100644
index 0000000000..f683f130cd
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/defaultstatus.html
@@ -0,0 +1,17 @@
+
+
+window.defaultStatus and window.defaultstatus are not supported
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/document-attribute.window.js b/testing/web-platform/tests/html/browsers/the-window-object/document-attribute.window.js
new file mode 100644
index 0000000000..f13acdb8a3
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/document-attribute.window.js
@@ -0,0 +1,15 @@
+async_test(t => {
+  const frame = document.createElement("iframe");
+  frame.onload = t.step_func(() => {
+    const frameW = frame.contentWindow,
+          frameD = frame.contentDocument;
+    assert_equals(frameW.document, frameD);
+    frame.remove();
+    assert_equals(frameW.document, frameD);
+    t.step_timeout(() => {
+      assert_equals(frameW.document, frameD);
+      t.done();
+    }, 100);
+  });
+  document.body.append(frame);
+}, "Window object's document IDL attribute and discarding the browsing context");
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/focus.window.js b/testing/web-platform/tests/html/browsers/the-window-object/focus.window.js
new file mode 100644
index 0000000000..6ec7feee28
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/focus.window.js
@@ -0,0 +1,15 @@
+async_test(t => {
+  const input = document.body.appendChild(document.createElement("input"));
+  input.onfocus = t.step_func(() => {
+    const frame = document.body.appendChild(document.createElement("iframe")),
+          frameW = frame.contentWindow;
+    frameW.onfocus = t.unreached_func();
+    frame.remove();
+    frameW.focus();
+    t.step_timeout(() => {
+      assert_equals(document.activeElement, input);
+      t.done();
+    }, 100);
+  });
+  input.focus();
+});
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/discard_iframe_history_1-1.html b/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/discard_iframe_history_1-1.html
new file mode 100644
index 0000000000..217608e46e
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/discard_iframe_history_1-1.html
@@ -0,0 +1,20 @@
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/discard_iframe_history_1-2.html b/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/discard_iframe_history_1-2.html
new file mode 100644
index 0000000000..b43598f2cd
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/discard_iframe_history_1-2.html
@@ -0,0 +1,2 @@
+
+Filler text
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/discard_iframe_history_1.html b/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/discard_iframe_history_1.html
new file mode 100644
index 0000000000..4d1e473fc0
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/discard_iframe_history_1.html
@@ -0,0 +1,10 @@
+
+Removing iframe from document removes it from history
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/discard_iframe_history_2-1.html b/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/discard_iframe_history_2-1.html
new file mode 100644
index 0000000000..61e5891ebd
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/discard_iframe_history_2-1.html
@@ -0,0 +1,22 @@
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/discard_iframe_history_2.html b/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/discard_iframe_history_2.html
new file mode 100644
index 0000000000..89d0fb4c64
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/discard_iframe_history_2.html
@@ -0,0 +1,10 @@
+
+Removing iframe from document via innerHTML removes it from history
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/discard_iframe_history_3-1.html b/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/discard_iframe_history_3-1.html
new file mode 100644
index 0000000000..de3f075d64
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/discard_iframe_history_3-1.html
@@ -0,0 +1,21 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/discard_iframe_history_3-2.html b/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/discard_iframe_history_3-2.html
new file mode 100644
index 0000000000..95f9fce5d8
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/discard_iframe_history_3-2.html
@@ -0,0 +1,4 @@
+Click me
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/discard_iframe_history_3-3.html b/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/discard_iframe_history_3-3.html
new file mode 100644
index 0000000000..4672b0ec30
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/discard_iframe_history_3-3.html
@@ -0,0 +1,4 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/discard_iframe_history_3.html b/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/discard_iframe_history_3.html
new file mode 100644
index 0000000000..38dbdbd0fa
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/discard_iframe_history_3.html
@@ -0,0 +1,9 @@
+
+Removing iframe from document removes it from history
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/discard_iframe_history_4-1.html b/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/discard_iframe_history_4-1.html
new file mode 100644
index 0000000000..1b5726cdcd
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/discard_iframe_history_4-1.html
@@ -0,0 +1,21 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/discard_iframe_history_4-2.html b/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/discard_iframe_history_4-2.html
new file mode 100644
index 0000000000..979b2b28e4
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/discard_iframe_history_4-2.html
@@ -0,0 +1,4 @@
+Click me
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/discard_iframe_history_4-3.html b/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/discard_iframe_history_4-3.html
new file mode 100644
index 0000000000..b4308f439a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/discard_iframe_history_4-3.html
@@ -0,0 +1,4 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/discard_iframe_history_4.html b/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/discard_iframe_history_4.html
new file mode 100644
index 0000000000..ffd444e3bf
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/discard_iframe_history_4.html
@@ -0,0 +1,9 @@
+
+Removing iframe from document removes it from history
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/non-automated/discard_iframe_history_1-1.html b/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/non-automated/discard_iframe_history_1-1.html
new file mode 100644
index 0000000000..9969427989
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/non-automated/discard_iframe_history_1-1.html
@@ -0,0 +1,27 @@
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/non-automated/discard_iframe_history_1-2.html b/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/non-automated/discard_iframe_history_1-2.html
new file mode 100644
index 0000000000..8c3d1a9dad
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/non-automated/discard_iframe_history_1-2.html
@@ -0,0 +1,2 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/non-automated/discard_iframe_history_1-manual.html b/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/non-automated/discard_iframe_history_1-manual.html
new file mode 100644
index 0000000000..ca9dd91f2e
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/non-automated/discard_iframe_history_1-manual.html
@@ -0,0 +1,10 @@
+
+Removing iframe from document removes it from history
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/non-automated/discard_iframe_history_2-1.html b/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/non-automated/discard_iframe_history_2-1.html
new file mode 100644
index 0000000000..bc01cae88c
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/non-automated/discard_iframe_history_2-1.html
@@ -0,0 +1,19 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/non-automated/discard_iframe_history_2-2.html b/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/non-automated/discard_iframe_history_2-2.html
new file mode 100644
index 0000000000..b25bf5f001
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/non-automated/discard_iframe_history_2-2.html
@@ -0,0 +1 @@
+Click me
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/non-automated/discard_iframe_history_2-3.html b/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/non-automated/discard_iframe_history_2-3.html
new file mode 100644
index 0000000000..68847e9a7c
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/non-automated/discard_iframe_history_2-3.html
@@ -0,0 +1 @@
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/non-automated/discard_iframe_history_2-manual.html b/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/non-automated/discard_iframe_history_2-manual.html
new file mode 100644
index 0000000000..57eaabcd0c
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/garbage-collection-and-browsing-contexts/non-automated/discard_iframe_history_2-manual.html
@@ -0,0 +1,10 @@
+
+Removing iframe from document removes it from history
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/historical.window.js b/testing/web-platform/tests/html/browsers/the-window-object/historical.window.js
new file mode 100644
index 0000000000..653f12b464
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/historical.window.js
@@ -0,0 +1,4 @@
+test(() => {
+  assert_false("showModalDialog" in window)
+  assert_false("showModalDialog" in Window.prototype)
+}, "showModalDialog() has been removed from the platform")
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/length-attribute.window.js b/testing/web-platform/tests/html/browsers/the-window-object/length-attribute.window.js
new file mode 100644
index 0000000000..d56e1e4692
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/length-attribute.window.js
@@ -0,0 +1,24 @@
+async_test(t => {
+  const frame = document.createElement("iframe");
+  frame.srcdoc = "";
+  frame.onload = t.step_func_done(() => {
+    const frameW = frame.contentWindow;
+    assert_equals(frameW.length, 2);
+    assert_not_equals(frameW.x, undefined);
+    assert_not_equals(frameW.y, undefined);
+    assert_equals(frameW.z, undefined);
+    assert_equals(frameW.x, frameW[0]);
+    assert_equals(frameW.y, frameW[1]);
+    const xFrameW = frameW.x;
+    assert_equals(xFrameW.length, 1);
+    assert_not_equals(xFrameW.z, undefined);
+    assert_equals(xFrameW.z, xFrameW[0]);
+    frame.remove();
+    assert_equals(frameW.length, 0);
+    assert_equals(frameW.x, undefined);
+    assert_equals(frameW[0], undefined);
+    assert_equals(xFrameW.length, 0);
+    assert_equals(xFrameW.z, undefined);
+  });
+  document.body.append(frame);
+}, "Window object's length IDL attribute (and named access)");
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/name-attribute.window.js b/testing/web-platform/tests/html/browsers/the-window-object/name-attribute.window.js
new file mode 100644
index 0000000000..f266dd7acb
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/name-attribute.window.js
@@ -0,0 +1,18 @@
+test(() => {
+  const frame = document.createElement("iframe"),
+        name = "A",
+        name2 = "B";
+  frame.setAttribute("name", name);
+  document.body.append(frame);
+  const frameW = frame.contentWindow;
+  assert_equals(frameW.name, name);
+  frameW.name = name2;
+  assert_equals(frame.getAttribute("name"), name);
+  assert_equals(frameW.name, name2);
+  frame.remove();
+  assert_equals(frame.getAttribute("name"), name);
+  assert_equals(frameW.name, "");
+  frameW.name = name2;
+  assert_equals(frame.getAttribute("name"), name);
+  assert_equals(frameW.name, "");
+}, "Window object's name IDL attribute");
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/named-access-on-the-window-object/cross-global-npo.html b/testing/web-platform/tests/html/browsers/the-window-object/named-access-on-the-window-object/cross-global-npo.html
new file mode 100644
index 0000000000..2acad0734c
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/named-access-on-the-window-object/cross-global-npo.html
@@ -0,0 +1,38 @@
+
+
+Named access across globals
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/named-access-on-the-window-object/cross-global-support.html b/testing/web-platform/tests/html/browsers/the-window-object/named-access-on-the-window-object/cross-global-support.html
new file mode 100644
index 0000000000..9d7b9f8a25
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/named-access-on-the-window-object/cross-global-support.html
@@ -0,0 +1,4 @@
+
+
+Named access across globals: support file
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/named-access-on-the-window-object/named-objects.html b/testing/web-platform/tests/html/browsers/the-window-object/named-access-on-the-window-object/named-objects.html
new file mode 100644
index 0000000000..d5b1789d59
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/named-access-on-the-window-object/named-objects.html
@@ -0,0 +1,76 @@
+
+
+HTML Test: Named access on the Window object
+
+
+
+
+

+

+  

+  
+  
+  
+  

+  
+  
+  
+
+  
+  
+  
+  
+  
+  
+  
+  
+

+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/named-access-on-the-window-object/navigated-named-objects.window.js b/testing/web-platform/tests/html/browsers/the-window-object/named-access-on-the-window-object/navigated-named-objects.window.js
new file mode 100644
index 0000000000..59d94efc99
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/named-access-on-the-window-object/navigated-named-objects.window.js
@@ -0,0 +1,67 @@
+// META: script=/common/get-host-info.sub.js
+
+function echoURL(content) {
+  return `/common/echo.py?content=${encodeURIComponent(content)}`;
+}
+
+function setSrc(frame, type, content) {
+  if (type === "same-origin") {
+    frame.src = echoURL(content);
+  } else if (type === "cross-site") {
+    frame.src = `${get_host_info().HTTP_NOTSAMESITE_ORIGIN}${echoURL(content)}`;
+  } else {
+    frame.srcdoc = content;
+  }
+}
+
+["srcdoc", "same-origin", "cross-site"].forEach(type => {
+  const initialType = type === "srcdoc" ? type : "same-origin";
+
+  [
+    {
+      "namedObject": "
",
+      "namedObjectLocalName": "div"
+    },
+    {
+      "namedObject": "",
+      "namedObjectLocalName": "object"
+    },
+    {
+      "namedObject": "",
+      "namedObjectLocalName": "iframe"
+    }
+  ].forEach(testData => {
+    async_test(t => {
+      const frame = document.createElement("iframe");
+      t.add_cleanup(() => frame.remove());
+      setSrc(frame, initialType, `${testData.namedObject}`);
+      frame.onload = t.step_func(() => {
+        const f = frame.contentWindow.f,
+              associatedAbc = f();
+        frame.onload = t.step_func_done(() => {
+          assert_equals(f(), associatedAbc);
+          assert_equals(associatedAbc.localName, testData.namedObjectLocalName);
+        });
+        setSrc(frame, type, "");
+      });
+      document.body.append(frame);
+    }, `Window's associated Document object is used for finding named objects (<${testData.namedObjectLocalName}> via ${type} 
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/named-access-on-the-window-object/window-null-names.html b/testing/web-platform/tests/html/browsers/the-window-object/named-access-on-the-window-object/window-null-names.html
new file mode 100644
index 0000000000..6801ef9d8a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/named-access-on-the-window-object/window-null-names.html
@@ -0,0 +1,20 @@
+
+
+Named access with null characters
+
+
+
+
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/navigate-to-about-blank-while-initial-load-pending.html b/testing/web-platform/tests/html/browsers/the-window-object/navigate-to-about-blank-while-initial-load-pending.html
new file mode 100644
index 0000000000..3a0def8ae6
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/navigate-to-about-blank-while-initial-load-pending.html
@@ -0,0 +1,26 @@
+
+
+Test navigating to about:blank while window.open initial load pending.
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/noopener-noreferrer-BarProp.window.js b/testing/web-platform/tests/html/browsers/the-window-object/noopener-noreferrer-BarProp.window.js
new file mode 100644
index 0000000000..a75a034650
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/noopener-noreferrer-BarProp.window.js
@@ -0,0 +1,23 @@
+const barProps = ["locationbar", "menubar", "personalbar", "scrollbars", "statusbar", "toolbar"];
+
+test(() => {
+  for(const prop of barProps) {
+    assert_true(window[prop].visible);
+  }
+}, "All bars visible");
+
+["noopener", "noreferrer"].forEach(openerStyle => {
+  async_test(t => {
+    const channelName = "5454" + openerStyle + "34324";
+    const channel = new BroadcastChannel(channelName);
+    window.open("support/BarProp-target.html?" + channelName, "", openerStyle);
+    channel.onmessage = t.step_func_done(e => {
+      // Send message first so if asserts throw the popup is still closed
+      channel.postMessage(null);
+
+      for(const prop of barProps) {
+        assert_true(e.data[prop]);
+      }
+    });
+  }, `window.open() with ${openerStyle} should have all bars visible`);
+});
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/noopener-noreferrer-sizing.window.js b/testing/web-platform/tests/html/browsers/the-window-object/noopener-noreferrer-sizing.window.js
new file mode 100644
index 0000000000..cc53ba5f2f
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/noopener-noreferrer-sizing.window.js
@@ -0,0 +1,17 @@
+const windowProps = ["innerWidth", "innerHeight"];
+
+["noopener", "noreferrer"].forEach(openerStyle => {
+  async_test(t => {
+    const channelName = "34342" + openerStyle + "8907";
+    const channel = new BroadcastChannel(channelName);
+    window.open("support/sizing-target.html?" + channelName, "", openerStyle);
+    channel.onmessage = t.step_func_done(e => {
+      // Send message first so if asserts throw the popup is still closed
+      channel.postMessage(null);
+
+      for(const prop of windowProps) {
+        assert_equals(window[prop], e.data[prop]);
+      }
+    });
+  }, `window.open() with ${openerStyle} should have equal viewport width and height`);
+});
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/open-close/callback.js b/testing/web-platform/tests/html/browsers/the-window-object/open-close/callback.js
new file mode 100644
index 0000000000..ae51265a21
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/open-close/callback.js
@@ -0,0 +1 @@
+opener.callback()
\ No newline at end of file
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/open-close/close_beforeunload-1.html b/testing/web-platform/tests/html/browsers/the-window-object/open-close/close_beforeunload-1.html
new file mode 100644
index 0000000000..6f44d8a83e
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/open-close/close_beforeunload-1.html
@@ -0,0 +1,7 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/open-close/close_beforeunload.html b/testing/web-platform/tests/html/browsers/the-window-object/open-close/close_beforeunload.html
new file mode 100644
index 0000000000..dcb8830ab6
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/open-close/close_beforeunload.html
@@ -0,0 +1,16 @@
+
+Running beforeunload handler in window.close()
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/open-close/close_pagehide-1.html b/testing/web-platform/tests/html/browsers/the-window-object/open-close/close_pagehide-1.html
new file mode 100644
index 0000000000..5631b539a6
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/open-close/close_pagehide-1.html
@@ -0,0 +1,7 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/open-close/close_pagehide.html b/testing/web-platform/tests/html/browsers/the-window-object/open-close/close_pagehide.html
new file mode 100644
index 0000000000..4d726437c2
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/open-close/close_pagehide.html
@@ -0,0 +1,16 @@
+
+Running pagehide handler in window.close()
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/open-close/close_script_defer-1.html b/testing/web-platform/tests/html/browsers/the-window-object/open-close/close_script_defer-1.html
new file mode 100644
index 0000000000..c50eddd41f
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/open-close/close_script_defer-1.html
@@ -0,0 +1 @@
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/open-close/close_script_defer.html b/testing/web-platform/tests/html/browsers/the-window-object/open-close/close_script_defer.html
new file mode 100644
index 0000000000..1217882b16
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/open-close/close_script_defer.html
@@ -0,0 +1,18 @@
+
+Running defer script in window.close()
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/open-close/close_unload-1.html b/testing/web-platform/tests/html/browsers/the-window-object/open-close/close_unload-1.html
new file mode 100644
index 0000000000..9a9e304e84
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/open-close/close_unload-1.html
@@ -0,0 +1,7 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/open-close/close_unload.html b/testing/web-platform/tests/html/browsers/the-window-object/open-close/close_unload.html
new file mode 100644
index 0000000000..e4d231b285
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/open-close/close_unload.html
@@ -0,0 +1,16 @@
+
+Running unload handler in window.close()
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/open-close/creating_browsing_context_test_01.html b/testing/web-platform/tests/html/browsers/the-window-object/open-close/creating_browsing_context_test_01.html
new file mode 100644
index 0000000000..062f61949d
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/open-close/creating_browsing_context_test_01.html
@@ -0,0 +1,39 @@
+
+
+[Browsing Context] : [APIs for creating browsing_contexts by name]
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/open-close/no_window_open_when_term_nesting_level_nonzero.window.js b/testing/web-platform/tests/html/browsers/the-window-object/open-close/no_window_open_when_term_nesting_level_nonzero.window.js
new file mode 100644
index 0000000000..3dff403b9c
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/open-close/no_window_open_when_term_nesting_level_nonzero.window.js
@@ -0,0 +1,113 @@
+test(function() {
+  var test_window = window.open('', '', 'height=1,width=1');
+  var test_document = test_window.document;
+
+  var frame = test_document.createElement('iframe');
+  test_document.body.appendChild(frame);
+
+  frame.contentWindow.onpagehide = function(evt) {
+    assert_equals(frame.contentWindow.open('', '', 'height=1,width=1'), null,
+      "expected no popup during pagehide");
+  };
+  frame.contentDocument.onvisibilitychange = function(evt) {
+    assert_equals(frame.contentWindow.open('', '', 'height=1,width=1'), null,
+      "expected no popup during visibilitychange");
+  };
+  frame.contentWindow.onbeforeunload = function(evt) {
+    assert_equals(frame.contentWindow.open('', '', 'height=1,width=1'), null,
+      "expected no popup during beforeunload");
+  };
+  frame.contentWindow.onunload = function(evt) {
+    assert_equals(frame.contentWindow.open('', '', 'height=1,width=1'), null,
+      "expected no popup during unload");
+  };
+
+  frame.remove();
+}, 'no popups with frame removal');
+
+async_test(function(t) {
+  var test_window = window.open('', '', 'height=1,width=1');
+  var test_document = test_window.document;
+
+  var frame = test_document.createElement('iframe');
+  test_document.body.appendChild(frame);
+
+  frame.contentWindow.onpagehide = t.step_func(function(evt) {
+    assert_equals(frame.contentWindow.open('', '', 'height=1,width=1'), null,
+      "expected no popup during pagehide");
+  });
+  frame.contentDocument.onvisibilitychange = t.step_func(function(evt) {
+    assert_equals(frame.contentWindow.open('', '', 'height=1,width=1'), null,
+      "expected no popup during visibilitychange");
+  });
+  frame.contentWindow.onbeforeunload = t.step_func(function(evt) {
+    assert_equals(frame.contentWindow.open('', '', 'height=1,width=1'), null,
+      "expected no popup during beforeunload");
+  });
+  frame.contentWindow.onunload = t.step_func(function(evt) {
+    assert_equals(frame.contentWindow.open('', '', 'height=1,width=1'), null,
+      "expected no popup during unload");
+  });
+
+  frame.onload = t.step_func_done();
+
+  frame.contentWindow.location.href = "about:blank";
+}, 'no popups with frame navigation');
+
+async_test(function(t) {
+  var test_window = window.open('', '', 'height=1,width=1');
+  var test_document = test_window.document;
+
+  var frame = test_document.createElement('iframe');
+  test_document.body.appendChild(frame);
+
+  frame.contentWindow.onpagehide = t.step_func(function(evt) {
+    assert_equals(test_window.open('', '', 'height=1,width=1'), null,
+      "expected no popup during pagehide");
+  });
+  frame.contentDocument.onvisibilitychange = t.step_func(function(evt) {
+    assert_equals(test_window.open('', '', 'height=1,width=1'), null,
+      "expected no popup during visibilitychange");
+  });
+  frame.contentWindow.onbeforeunload = t.step_func(function(evt) {
+    assert_equals(test_window.open('', '', 'height=1,width=1'), null,
+      "expected no popup during beforeunload");
+  });
+  frame.contentWindow.onunload = t.step_func(function(evt) {
+    assert_equals(test_window.open('', '', 'height=1,width=1'), null,
+      "expected no popup during unload");
+  });
+
+  frame.onload = t.step_func_done();
+
+  frame.contentWindow.location.href = "about:blank";
+}, 'no popups from synchronously reachable window');
+
+async_test(function(t) {
+  var test_window = window.open('', '', 'height=1,width=1');
+  var test_document = test_window.document;
+
+  var frame = test_document.createElement('iframe');
+  test_document.body.appendChild(frame);
+
+  frame.contentWindow.onpagehide = t.step_func(function(evt) {
+    assert_equals(window.open('', '', 'height=1,width=1'), null,
+      "expected no popup during pagehide");
+  });
+  frame.contentDocument.onvisibilitychange = t.step_func(function(evt) {
+    assert_equals(window.open('', '', 'height=1,width=1'), null,
+      "expected no popup during visibilitychange");
+  });
+  frame.contentWindow.onbeforeunload = t.step_func(function(evt) {
+    assert_equals(window.open('', '', 'height=1,width=1'), null,
+      "expected no popup during beforeunload");
+  });
+  frame.contentWindow.onunload = t.step_func(function(evt) {
+    assert_equals(window.open('', '', 'height=1,width=1'), null,
+      "expected no popup during unload");
+  });
+
+  frame.onload = t.step_func_done();
+
+  frame.contentWindow.location.href = "about:blank";
+}, 'no popups from another synchronously reachable window');
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/open-close/non_automated/001-1.html b/testing/web-platform/tests/html/browsers/the-window-object/open-close/non_automated/001-1.html
new file mode 100644
index 0000000000..7dd48b41c2
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/open-close/non_automated/001-1.html
@@ -0,0 +1,2 @@
+
+
Now open a new tab and navigate to 001-2

diff --git a/testing/web-platform/tests/html/browsers/the-window-object/open-close/non_automated/001-2.html b/testing/web-platform/tests/html/browsers/the-window-object/open-close/non_automated/001-2.html
new file mode 100644
index 0000000000..b1413861a3
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/open-close/non_automated/001-2.html
@@ -0,0 +1,16 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/open-close/non_automated/001.html b/testing/web-platform/tests/html/browsers/the-window-object/open-close/non_automated/001.html
new file mode 100644
index 0000000000..7b0f21ec04
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/open-close/non_automated/001.html
@@ -0,0 +1,3 @@
+
+Accessing named windows from outside the unit of related browsing contexts
+Click here
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/open-close/non_automated/002-1.html b/testing/web-platform/tests/html/browsers/the-window-object/open-close/non_automated/002-1.html
new file mode 100644
index 0000000000..0e210f351b
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/open-close/non_automated/002-1.html
@@ -0,0 +1,8 @@
+
+
Now open a new tab and navigate to 

+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/open-close/non_automated/002-2.html b/testing/web-platform/tests/html/browsers/the-window-object/open-close/non_automated/002-2.html
new file mode 100644
index 0000000000..b1413861a3
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/open-close/non_automated/002-2.html
@@ -0,0 +1,16 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/open-close/non_automated/002.html b/testing/web-platform/tests/html/browsers/the-window-object/open-close/non_automated/002.html
new file mode 100644
index 0000000000..b568ae8d48
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/open-close/non_automated/002.html
@@ -0,0 +1,3 @@
+
+Accessing different-origin named windows from outside the unit of related browsing contexts
+Click here
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-is-popup-condition.html b/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-is-popup-condition.html
new file mode 100644
index 0000000000..4f52e2e8de
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-is-popup-condition.html
@@ -0,0 +1,149 @@
+
+
+HTML: window.open `features`: condition for is popup
+
+
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-negative-innerwidth-innerheight.html b/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-negative-innerwidth-innerheight.html
new file mode 100644
index 0000000000..019ee9d730
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-negative-innerwidth-innerheight.html
@@ -0,0 +1,75 @@
+
+
+HTML: window.open `features`: negative values for legacy `innerwidth`, `innerheight`
+
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-negative-screenx-screeny.html b/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-negative-screenx-screeny.html
new file mode 100644
index 0000000000..6e316db482
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-negative-screenx-screeny.html
@@ -0,0 +1,67 @@
+
+
+HTML: window.open `features`: negative values for legacy `screenx`, `screeny`
+
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-negative-top-left.html b/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-negative-top-left.html
new file mode 100644
index 0000000000..316b01a401
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-negative-top-left.html
@@ -0,0 +1,68 @@
+
+
+HTML: window.open `features`: negative values for `top`, `left`
+
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-negative-width-height.html b/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-negative-width-height.html
new file mode 100644
index 0000000000..3cb155620d
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-negative-width-height.html
@@ -0,0 +1,75 @@
+
+
+HTML: window.open `features`: negative values for `width`, `height`
+
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-non-integer-height.html b/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-non-integer-height.html
new file mode 100644
index 0000000000..d8ee866c50
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-non-integer-height.html
@@ -0,0 +1,91 @@
+
+
+HTML: window.open `features`: non-integer values for feature `height`
+
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-non-integer-innerheight.html b/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-non-integer-innerheight.html
new file mode 100644
index 0000000000..f191d875d8
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-non-integer-innerheight.html
@@ -0,0 +1,76 @@
+
+
+HTML: window.open `features`: non-integer values for legacy feature `innerheight`
+
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-non-integer-innerwidth.html b/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-non-integer-innerwidth.html
new file mode 100644
index 0000000000..d1ddc5e43a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-non-integer-innerwidth.html
@@ -0,0 +1,75 @@
+
+
+HTML: window.open `features`: non-integer values for legacy feature `innerwidth`
+
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-non-integer-left.html b/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-non-integer-left.html
new file mode 100644
index 0000000000..c771204dc4
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-non-integer-left.html
@@ -0,0 +1,76 @@
+
+
+HTML: window.open `features`: non-integer values for feature `left`
+
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-non-integer-screenx.html b/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-non-integer-screenx.html
new file mode 100644
index 0000000000..49a3783257
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-non-integer-screenx.html
@@ -0,0 +1,75 @@
+
+
+HTML: window.open `features`: non-integer values for legacy feature `screenx`
+
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-non-integer-screeny.html b/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-non-integer-screeny.html
new file mode 100644
index 0000000000..5183405445
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-non-integer-screeny.html
@@ -0,0 +1,76 @@
+
+
+HTML: window.open `features`: non-integer values for legacy feature `screeny`
+
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-non-integer-top.html b/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-non-integer-top.html
new file mode 100644
index 0000000000..a7926e748b
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-non-integer-top.html
@@ -0,0 +1,73 @@
+
+
+HTML: window.open `features`: non-integer values for feature `top`
+
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-non-integer-width.html b/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-non-integer-width.html
new file mode 100644
index 0000000000..6878063ed7
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-non-integer-width.html
@@ -0,0 +1,91 @@
+
+
+HTML: window.open `features`: non-integer values for feature `width`
+
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-tokenization-innerheight-innerwidth.html b/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-tokenization-innerheight-innerwidth.html
new file mode 100644
index 0000000000..cf3ad25514
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-tokenization-innerheight-innerwidth.html
@@ -0,0 +1,55 @@
+
+
+HTML: window.open `features`: tokenization -- legacy size features `innerheight`, `innerwidth`
+
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-tokenization-noopener.html b/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-tokenization-noopener.html
new file mode 100644
index 0000000000..c955e67789
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-tokenization-noopener.html
@@ -0,0 +1,11 @@
+
+
+HTML: window.open `features`: tokenization -- `noopener`
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-tokenization-noreferrer.html b/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-tokenization-noreferrer.html
new file mode 100644
index 0000000000..4807f634fd
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-tokenization-noreferrer.html
@@ -0,0 +1,11 @@
+
+
+HTML: window.open `features`: tokenization -- `noreferrer`
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-tokenization-screenx-screeny.html b/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-tokenization-screenx-screeny.html
new file mode 100644
index 0000000000..5a53fefc40
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-tokenization-screenx-screeny.html
@@ -0,0 +1,55 @@
+
+
+HTML: window.open `features`: tokenization -- legacy position features `screenx`, `screeny`
+
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-tokenization-top-left.html b/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-tokenization-top-left.html
new file mode 100644
index 0000000000..842cbcf820
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-tokenization-top-left.html
@@ -0,0 +1,69 @@
+
+
+HTML: window.open `features`: tokenization -- position features `top` and `left`
+
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-tokenization-width-height.html b/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-tokenization-width-height.html
new file mode 100644
index 0000000000..ff61199179
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/open-close/open-features-tokenization-width-height.html
@@ -0,0 +1,71 @@
+
+
+HTML: window.open `features`: tokenization -- size features `width` and `height`
+
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/open-close/resources/close-self.html b/testing/web-platform/tests/html/browsers/the-window-object/open-close/resources/close-self.html
new file mode 100644
index 0000000000..0c0cf9fc49
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/open-close/resources/close-self.html
@@ -0,0 +1,3 @@
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/open-close/resources/is-popup-barprop.html b/testing/web-platform/tests/html/browsers/the-window-object/open-close/resources/is-popup-barprop.html
new file mode 100644
index 0000000000..5636e29878
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/open-close/resources/is-popup-barprop.html
@@ -0,0 +1,15 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/open-close/resources/message-opener.html b/testing/web-platform/tests/html/browsers/the-window-object/open-close/resources/message-opener.html
new file mode 100644
index 0000000000..39ad139769
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/open-close/resources/message-opener.html
@@ -0,0 +1,52 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/open-close/resources/tokenization-noopener-noreferrer.js b/testing/web-platform/tests/html/browsers/the-window-object/open-close/resources/tokenization-noopener-noreferrer.js
new file mode 100644
index 0000000000..a9d42e26de
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/open-close/resources/tokenization-noopener-noreferrer.js
@@ -0,0 +1,152 @@
+function booleanTests(feature) {
+  const windowURL = 'resources/close-self.html';
+  // Tests for how windows features are tokenized into 'name', 'value'
+  // window features separators are ASCII whitespace, '=' and  ','
+
+  const featureUpper = feature.toUpperCase(),
+        featureSplitBegin = feature.slice(0, 2),
+        featureSplitEnd = feature.slice(2),
+        featureMixedCase = featureSplitBegin.toUpperCase() + featureSplitEnd;
+        featureMixedCase2 = featureSplitBegin + featureSplitEnd.toUpperCase();
+
+  test (t => {
+    // Tokenizing `name`: initial window features separators are ignored
+    // Each of these variants should tokenize to (`${feature}`, '')
+    [
+      ` ${feature}`,
+      `=${feature}`,
+      `,,${feature}`,
+      `,=, ${feature}`,
+      `\n=${feature}=`,
+      `\t${feature}`,
+      `\r,,,=${feature}`,
+      `\u000C${feature}`
+    ].forEach(variant => {
+      const win = window.open(windowURL, "", variant);
+      assert_equals(win, null, `"${variant}" should activate feature "${feature}"`);
+    });
+  }, `Tokenization of "${feature}" should skip window features separators before feature`);
+
+  test (t => {
+    // Tokenizing `name`: lowercase conversion
+    // Each of these variants should tokenize as feature (`${feature}`, '')
+    // except where indicated
+    // Note also that `value` is lowercased during tokenization
+    [
+      `${featureUpper}`,
+      `${featureMixedCase}`,
+      `  ${featureMixedCase2}`,
+      `=${featureUpper}`,
+      `${featureUpper}=1`,
+      `${featureUpper}=1`,
+      `${featureUpper}=yes`,
+      `${feature}=YES`,
+    ].forEach(variant => {
+      const win = window.open(windowURL, '', variant);
+      assert_equals(win, null, `"${variant}" should activate feature "${feature}"`);
+    });
+  }, `Feature "${feature}" should be converted to ASCII lowercase`);
+
+  test (t => {
+    // After `name` has been collected, ignore any window features separators until '='
+    // except ',' OR a non-window-features-separator — break in those cases
+    // i.e. ignore whitespace until '=' unless a ',' is encountered first
+    // Each of these variants should tokenize as feature ('noopener', '')
+    [
+      `${feature}`,
+      ` ${feature}\r`,
+      `${feature}\n =`,
+      `${feature},`,
+      `${feature}  =,`,
+      `, ${feature}   =`,
+      `${feature},=`,
+      `${feature} foo`,
+      `foo ${feature}=1`,
+      `foo=\u000Cbar\u000C${feature}`
+    ].forEach(variant => {
+      const win = window.open(windowURL, '', variant);
+      assert_equals(win, null, `"${variant}" should activate feature "${feature}"`);
+    });
+  }, `After "${feature}", tokenization should skip window features separators that are not "=" or ","`);
+
+  test (t => {
+    // After initial '=', tokenizing should ignore all separators except ','
+    // before collecting `value`
+    // Each of these variants should tokenize as feature ('noopener', '')
+    // Except where indicated
+    [
+      `${feature}=  yes`,
+      `${feature}==,`,
+      `${feature}=\n ,`,
+      `${feature} = \t ,`,
+      `${feature}\n=\r 1,`,
+      `${feature}=,yes`,
+      `${feature}= yes=,`,
+      `${feature} = \u000Cyes`
+    ].forEach(variant => {
+      const win = window.open(windowURL, '', variant);
+      assert_equals(win, null, `"${variant}" should activate feature "${feature}"`);
+    });
+  }, `Tokenizing "${feature}" should ignore window feature separators except "," after initial "=" and before value`);
+
+  test (t => {
+    // Tokenizing `value` should collect any non-separator code points until first separator
+    [
+      `${feature}=1`,
+      `${feature}=yes`,
+      `${feature} = yes ,`,
+      `${feature}=\nyes  ,`,
+      `${feature}=yes yes`,
+      `${feature}=yes\ts`,
+      `${feature}==`,
+      `${feature}=1\n,`,
+      `==${feature}===`,
+      `${feature}==\u000C`
+    ].forEach(variant => {
+      const win = window.open(windowURL, '', variant);
+      assert_equals(win, null, `"${variant}" should set "${feature}"`);
+    });
+  }, `Tokenizing "${feature}" should read characters until first window feature separator as \`value\``);
+
+  test (t => {
+    [
+      `${feature}=1`,
+      `${feature}=2`,
+      `${feature}=12345`,
+      `${feature}=1.5`,
+      `${feature}=-1`,
+    ].forEach(variant => {
+      const win = window.open(windowURL, '', variant);
+      assert_equals(win, null, `"${variant}" should activate feature "${feature}"`);
+    });
+  }, 'Integer values other than 0 should activate the feature');
+
+  test (t => {
+    [
+      `${feature}=0`,
+      `${feature}=0.5`,
+      `${feature}=error`,
+    ].forEach(variant => {
+      const win = window.open(windowURL, '', variant);
+      assert_not_equals(win, null, `"${variant}" should NOT activate feature "${feature}"`);
+    });
+  }, `Integer value of 0 should not activate "${feature}"`);
+
+  test (t => {
+    [
+      `-${feature}`,
+      `${featureUpper}RRR`,
+      `${featureMixedCase}R`,
+      `${featureSplitBegin}_${featureSplitEnd}`,
+      ` ${featureSplitBegin} ${featureSplitEnd}`,
+      `${featureSplitBegin}\n${featureSplitEnd}`,
+      `${featureSplitBegin},${featureSplitEnd}`,
+      `\0${feature}`,
+      `${feature}\u0000=yes`,
+      `foo=\u000C${feature}`
+    ].forEach(variant => {
+      const win = window.open(windowURL, '', variant);
+      assert_not_equals(win, null, `"${variant}" should NOT activate feature "${feature}"`);
+    });
+  }, `Invalid feature names should not tokenize as "${feature}"`);
+}
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/proxy-getOwnPropertyDescriptor.html b/testing/web-platform/tests/html/browsers/the-window-object/proxy-getOwnPropertyDescriptor.html
new file mode 100644
index 0000000000..4ea9504870
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/proxy-getOwnPropertyDescriptor.html
@@ -0,0 +1,126 @@
+
+
+
+  
+  getOwnPropertyDescriptor() is correct for Proxy with host object target
+  
+  
+  
+  
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/security-window/window-security.https.html b/testing/web-platform/tests/html/browsers/the-window-object/security-window/window-security.https.html
new file mode 100644
index 0000000000..68af5bd90b
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/security-window/window-security.https.html
@@ -0,0 +1,200 @@
+
+
+HTML Test: Window Security
+
+
+
+
+
+
+
+
+
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/self-et-al.window.js b/testing/web-platform/tests/html/browsers/the-window-object/self-et-al.window.js
new file mode 100644
index 0000000000..c42522803a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/self-et-al.window.js
@@ -0,0 +1,43 @@
+function delayed_assert_done(t, w, windowProxySelfReference) {
+  // Let's make sure nobody is being sneaky
+  t.step_timeout(() => {
+    t.step_timeout(() => {
+      assert_equals(w[windowProxySelfReference], w, `${windowProxySelfReference} got cleared after some time`);
+      t.done();
+    }, 0);
+  }, 0);
+}
+
+[
+  "frames",
+  "globalThis",
+  "self",
+  "window"
+].forEach(windowProxySelfReference => {
+  async_test(t => {
+    const frame = document.body.appendChild(document.createElement("iframe")),
+          otherW = frame.contentWindow;
+    assert_equals(otherW[windowProxySelfReference], otherW, `${windowProxySelfReference} is broken`);
+    frame.remove();
+    assert_equals(otherW[windowProxySelfReference], otherW, `${windowProxySelfReference} got cleared after browsing context removal`);
+    assert_true(otherW.closed);
+
+    delayed_assert_done(t, otherW, windowProxySelfReference);
+  }, `iframeWindow.${windowProxySelfReference} before and after removal`);
+
+  async_test(t => {
+    const otherW = window.open();
+    assert_equals(otherW[windowProxySelfReference], otherW, `${windowProxySelfReference} is broken`);
+    otherW.onpagehide = t.step_func(() => {
+      assert_equals(otherW[windowProxySelfReference], otherW, `${windowProxySelfReference} got cleared after browsing context pagehide`);
+      t.step_timeout(() => {
+        assert_equals(otherW.opener, null); // Ensure browsing context is discarded
+        assert_equals(otherW[windowProxySelfReference], otherW, `${windowProxySelfReference} got cleared after browsing context removal`);
+        delayed_assert_done(t, otherW, windowProxySelfReference);
+      }, 0);
+    });
+    otherW.close();
+    assert_equals(otherW[windowProxySelfReference], otherW, `${windowProxySelfReference} got cleared after browsing context closure`);
+    assert_true(otherW.closed);
+  }, `popupWindow.${windowProxySelfReference} before, after closing, and after discarding`)
+});
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/support/BarProp-target.html b/testing/web-platform/tests/html/browsers/the-window-object/support/BarProp-target.html
new file mode 100644
index 0000000000..9921e7a577
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/support/BarProp-target.html
@@ -0,0 +1,17 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/support/closed.html b/testing/web-platform/tests/html/browsers/the-window-object/support/closed.html
new file mode 100644
index 0000000000..3b70598e34
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/support/closed.html
@@ -0,0 +1,12 @@
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/support/noopener-target.html b/testing/web-platform/tests/html/browsers/the-window-object/support/noopener-target.html
new file mode 100644
index 0000000000..41e197a746
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/support/noopener-target.html
@@ -0,0 +1,15 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/support/noreferrer-target.html b/testing/web-platform/tests/html/browsers/the-window-object/support/noreferrer-target.html
new file mode 100644
index 0000000000..c2446c6fe9
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/support/noreferrer-target.html
@@ -0,0 +1,13 @@
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/support/same-origin-iframe.html b/testing/web-platform/tests/html/browsers/the-window-object/support/same-origin-iframe.html
new file mode 100644
index 0000000000..763d9e466b
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/support/same-origin-iframe.html
@@ -0,0 +1,8 @@
+
+
+  
+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/support/sizing-target.html b/testing/web-platform/tests/html/browsers/the-window-object/support/sizing-target.html
new file mode 100644
index 0000000000..7cd5348a85
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/support/sizing-target.html
@@ -0,0 +1,17 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/support/window-open-popup-target.html b/testing/web-platform/tests/html/browsers/the-window-object/support/window-open-popup-target.html
new file mode 100644
index 0000000000..a0588de829
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/support/window-open-popup-target.html
@@ -0,0 +1,24 @@
+
+
\ No newline at end of file
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/support/windowFeature-values-target.html b/testing/web-platform/tests/html/browsers/the-window-object/support/windowFeature-values-target.html
new file mode 100644
index 0000000000..3a78ddf660
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/support/windowFeature-values-target.html
@@ -0,0 +1,24 @@
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/window-aliases.html b/testing/web-platform/tests/html/browsers/the-window-object/window-aliases.html
new file mode 100644
index 0000000000..135be02a30
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/window-aliases.html
@@ -0,0 +1,28 @@
+
+
+Aliases of the window object
+
+
+
+
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/window-indexed-access-vs-named-access.html b/testing/web-platform/tests/html/browsers/the-window-object/window-indexed-access-vs-named-access.html
new file mode 100644
index 0000000000..23b9124ef7
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/window-indexed-access-vs-named-access.html
@@ -0,0 +1,58 @@
+
+
+Interactions between indexed and named access on the Window object
+
+
+
+
+
+

+

+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/window-indexed-properties-delete-no-cache.html b/testing/web-platform/tests/html/browsers/the-window-object/window-indexed-properties-delete-no-cache.html
new file mode 100644
index 0000000000..22262943aa
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/window-indexed-properties-delete-no-cache.html
@@ -0,0 +1,31 @@
+
+
+Deletion of WindowProxy's indexed properties is not cached
+
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/window-indexed-properties-strict.html b/testing/web-platform/tests/html/browsers/the-window-object/window-indexed-properties-strict.html
new file mode 100644
index 0000000000..2ee10a7a64
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/window-indexed-properties-strict.html
@@ -0,0 +1,75 @@
+
+
+Indexed properties of the window object (strict mode)
+
+
+
+
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/window-indexed-properties.html b/testing/web-platform/tests/html/browsers/the-window-object/window-indexed-properties.html
new file mode 100644
index 0000000000..57f18c5944
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/window-indexed-properties.html
@@ -0,0 +1,71 @@
+
+
+Indexed properties of the window object (non-strict mode)
+
+
+
+
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/window-open-defaults.window.js b/testing/web-platform/tests/html/browsers/the-window-object/window-open-defaults.window.js
new file mode 100644
index 0000000000..1b2d68a462
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/window-open-defaults.window.js
@@ -0,0 +1,12 @@
+async_test(t => {
+  const frame = document.createElement("iframe");
+  t.add_cleanup(() => frame.remove());
+  frame.name = "foo";
+  frame.src = "/common/blank.html";
+  frame.onload = t.step_func(() => {
+    frame.onload = t.unreached_func();
+    t.step_timeout(() => t.done(), 500);
+    assert_equals(window[0], window.open(undefined, "foo"));
+  });
+  document.body.append(frame);
+}, "window.open()'s url parameter default");
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/window-open-invalid-url.html b/testing/web-platform/tests/html/browsers/the-window-object/window-open-invalid-url.html
new file mode 100644
index 0000000000..cabc143b9d
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/window-open-invalid-url.html
@@ -0,0 +1,10 @@
+
+
+window.open() with an invalid URL
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/window-open-noopener.html b/testing/web-platform/tests/html/browsers/the-window-object/window-open-noopener.html
new file mode 100644
index 0000000000..8d3a95df63
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/window-open-noopener.html
@@ -0,0 +1,137 @@
+
+
+window.open() with "noopener" tests
+
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/window-open-noreferrer.html b/testing/web-platform/tests/html/browsers/the-window-object/window-open-noreferrer.html
new file mode 100644
index 0000000000..92b72cdb5f
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/window-open-noreferrer.html
@@ -0,0 +1,20 @@
+
+
+window.open() with "noreferrer" tests
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/window-open-popup-behavior.html b/testing/web-platform/tests/html/browsers/the-window-object/window-open-popup-behavior.html
new file mode 100644
index 0000000000..258698d94d
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/window-open-popup-behavior.html
@@ -0,0 +1,51 @@
+
+
+
+Window.open popup behavior
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/window-open-windowfeatures-values.html b/testing/web-platform/tests/html/browsers/the-window-object/window-open-windowfeatures-values.html
new file mode 100644
index 0000000000..32551dd8d7
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/window-open-windowfeatures-values.html
@@ -0,0 +1,72 @@
+
+
+
+window.open() windowFeature value parsing
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/window-opener-unconfigurable.window.js b/testing/web-platform/tests/html/browsers/the-window-object/window-opener-unconfigurable.window.js
new file mode 100644
index 0000000000..2b9bda6792
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/window-opener-unconfigurable.window.js
@@ -0,0 +1,17 @@
+test(t => {
+  let desc = Object.getOwnPropertyDescriptor(self, "opener");
+  assert_true(!!desc.get, "Initially {get: function}");
+  assert_true(!!desc.set, "Initially {set: function}");
+  assert_true(desc.configurable, "Initially {configurable: true}");
+  assert_true(desc.enumerable, "Initially {enumerable: true}");
+
+  Object.defineProperty(self, "opener", {configurable: false});
+
+  desc = Object.getOwnPropertyDescriptor(self, "opener");
+  assert_true(!!desc.get, "Still has {get: function}");
+  assert_true(!!desc.set, "Still has {set: function}");
+  assert_false(desc.configurable, "Changed to {configurable: false}");
+  assert_true(desc.enumerable, "Still has {enumerable: true}");
+
+  assert_throws_js(TypeError, () => self.opener = "something", "Throws a TypeError due to {configurable: false}");
+}, "Corner case: self.opener is set while it's not configurable");
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/window-properties.https.html b/testing/web-platform/tests/html/browsers/the-window-object/window-properties.https.html
new file mode 100644
index 0000000000..2fb408cdc9
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/window-properties.https.html
@@ -0,0 +1,359 @@
+
+
+Properties of the window object
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/window-prototype-chain.html b/testing/web-platform/tests/html/browsers/the-window-object/window-prototype-chain.html
new file mode 100644
index 0000000000..14dbca35e8
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/window-prototype-chain.html
@@ -0,0 +1,32 @@
+
+
+Prototype chain of the window object
+
+
+
+
+
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/the-window-object/window-reuse-in-nested-browsing-contexts.tentative.html b/testing/web-platform/tests/html/browsers/the-window-object/window-reuse-in-nested-browsing-contexts.tentative.html
new file mode 100644
index 0000000000..03c7a68dfd
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-window-object/window-reuse-in-nested-browsing-contexts.tentative.html
@@ -0,0 +1,158 @@
+
+
+
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/the-windowproxy-exotic-object/document-tree-child-browsing-context-name-property-set.sub.html b/testing/web-platform/tests/html/browsers/the-windowproxy-exotic-object/document-tree-child-browsing-context-name-property-set.sub.html
new file mode 100644
index 0000000000..171aa01999
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-windowproxy-exotic-object/document-tree-child-browsing-context-name-property-set.sub.html
@@ -0,0 +1,26 @@
+
+
+document-tree child browsing context name property set
+
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-windowproxy-exotic-object/windowproxy-define-own-property-unforgeable-same-origin.html b/testing/web-platform/tests/html/browsers/the-windowproxy-exotic-object/windowproxy-define-own-property-unforgeable-same-origin.html
new file mode 100644
index 0000000000..ac4eb458c3
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-windowproxy-exotic-object/windowproxy-define-own-property-unforgeable-same-origin.html
@@ -0,0 +1,47 @@
+
+
+[[DefineOwnProperty]] on a WindowProxy forwards to OrdinaryDefineOwnProperty for same-origin objects
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-windowproxy-exotic-object/windowproxy-prevent-extensions.html b/testing/web-platform/tests/html/browsers/the-windowproxy-exotic-object/windowproxy-prevent-extensions.html
new file mode 100644
index 0000000000..97a156290a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-windowproxy-exotic-object/windowproxy-prevent-extensions.html
@@ -0,0 +1,21 @@
+
+
+[[PreventExtensions]] on a WindowProxy object should return false
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-windowproxy-exotic-object/windowproxy-prototype-setting-cross-origin-domain.sub.html b/testing/web-platform/tests/html/browsers/the-windowproxy-exotic-object/windowproxy-prototype-setting-cross-origin-domain.sub.html
new file mode 100644
index 0000000000..a5ae78cc87
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-windowproxy-exotic-object/windowproxy-prototype-setting-cross-origin-domain.sub.html
@@ -0,0 +1,29 @@
+
+
+[[SetPrototypeOf]] on a WindowProxy object should not allow changing its value: cross-origin via document.domain
+
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-windowproxy-exotic-object/windowproxy-prototype-setting-cross-origin.sub.html b/testing/web-platform/tests/html/browsers/the-windowproxy-exotic-object/windowproxy-prototype-setting-cross-origin.sub.html
new file mode 100644
index 0000000000..a5c1a2f102
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-windowproxy-exotic-object/windowproxy-prototype-setting-cross-origin.sub.html
@@ -0,0 +1,28 @@
+
+
+[[SetPrototypeOf]] on a WindowProxy object should not allow changing its value: cross-origin
+
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-windowproxy-exotic-object/windowproxy-prototype-setting-goes-cross-origin-domain.sub.html b/testing/web-platform/tests/html/browsers/the-windowproxy-exotic-object/windowproxy-prototype-setting-goes-cross-origin-domain.sub.html
new file mode 100644
index 0000000000..c2a6def6c2
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-windowproxy-exotic-object/windowproxy-prototype-setting-goes-cross-origin-domain.sub.html
@@ -0,0 +1,35 @@
+
+
+[[SetPrototypeOf]] on a WindowProxy object should not allow changing its value: cross-origin via document.domain after initially getting the object
+
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-windowproxy-exotic-object/windowproxy-prototype-setting-same-origin-domain.sub.html b/testing/web-platform/tests/html/browsers/the-windowproxy-exotic-object/windowproxy-prototype-setting-same-origin-domain.sub.html
new file mode 100644
index 0000000000..fb18822ac5
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-windowproxy-exotic-object/windowproxy-prototype-setting-same-origin-domain.sub.html
@@ -0,0 +1,30 @@
+
+
+[[SetPrototypeOf]] on a WindowProxy object should not allow changing its value: cross-origin, but same-origin-domain
+
+
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/the-windowproxy-exotic-object/windowproxy-prototype-setting-same-origin.html b/testing/web-platform/tests/html/browsers/the-windowproxy-exotic-object/windowproxy-prototype-setting-same-origin.html
new file mode 100644
index 0000000000..5779199ca3
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/the-windowproxy-exotic-object/windowproxy-prototype-setting-same-origin.html
@@ -0,0 +1,21 @@
+
+
+[[SetPrototypeOf]] on a WindowProxy object should not allow changing its value: same-origin
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/auxiliary-browsing-contexts/opener-closed.html b/testing/web-platform/tests/html/browsers/windows/auxiliary-browsing-contexts/opener-closed.html
new file mode 100644
index 0000000000..106c3f97cb
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/auxiliary-browsing-contexts/opener-closed.html
@@ -0,0 +1,31 @@
+
+
+
+  
+    Auxiliary Browsing Contexts: window.opener when Opener Removed/Closed
+    
+    
+    
+  
+  
+    

+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/windows/auxiliary-browsing-contexts/opener-multiple.html b/testing/web-platform/tests/html/browsers/windows/auxiliary-browsing-contexts/opener-multiple.html
new file mode 100644
index 0000000000..e71d4dc868
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/auxiliary-browsing-contexts/opener-multiple.html
@@ -0,0 +1,35 @@
+
+
+  
+    Auxiliary Browsing Contexts: window.opener, multiple
+    
+    
+    
+  
+  
+    

+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/windows/auxiliary-browsing-contexts/opener-noopener.html b/testing/web-platform/tests/html/browsers/windows/auxiliary-browsing-contexts/opener-noopener.html
new file mode 100644
index 0000000000..086a96442d
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/auxiliary-browsing-contexts/opener-noopener.html
@@ -0,0 +1,25 @@
+
+
+  
+    Auxiliary Browsing Contexts: window.opener noopener
+    
+    
+    
+  
+  
+    

+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/windows/auxiliary-browsing-contexts/opener-noreferrer.html b/testing/web-platform/tests/html/browsers/windows/auxiliary-browsing-contexts/opener-noreferrer.html
new file mode 100644
index 0000000000..b8226bd2b9
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/auxiliary-browsing-contexts/opener-noreferrer.html
@@ -0,0 +1,29 @@
+
+
+  
+    Auxiliary Browsing Contexts: window.opener noreferrer
+    
+    
+    
+  
+  
+    

+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/windows/auxiliary-browsing-contexts/opener-setter.html b/testing/web-platform/tests/html/browsers/windows/auxiliary-browsing-contexts/opener-setter.html
new file mode 100644
index 0000000000..ac6e47b846
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/auxiliary-browsing-contexts/opener-setter.html
@@ -0,0 +1,33 @@
+
+
+  
+    Auxiliary Browsing Contexts: window.opener setter
+    
+    
+    
+    
+  
+  
+    

+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/windows/auxiliary-browsing-contexts/opener-setter.window.js b/testing/web-platform/tests/html/browsers/windows/auxiliary-browsing-contexts/opener-setter.window.js
new file mode 100644
index 0000000000..6d540ce97c
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/auxiliary-browsing-contexts/opener-setter.window.js
@@ -0,0 +1,38 @@
+[
+  undefined,
+  42,
+  function() { return "hi" },
+  "hi",
+  {},
+  [],
+  Symbol()
+].forEach(val => {
+  test(t => {
+    const frame = document.body.appendChild(document.createElement("iframe")),
+          win = frame.contentWindow;
+    t.add_cleanup(() => frame.remove());
+
+    assert_own_property(win, "opener");
+    assert_equals(win.opener, null);
+    const beforeDesc = Object.getOwnPropertyDescriptor(win, "opener"),
+          openerGet = beforeDesc.get,
+          openerSet = beforeDesc.set;
+    assert_own_property(beforeDesc, "get");
+    assert_own_property(beforeDesc, "set");
+    assert_true(beforeDesc.enumerable);
+    assert_true(beforeDesc.configurable);
+
+    win.opener = val;
+    assert_equals(win.opener, val);
+    assert_equals(openerGet(), null);
+
+    const desc = Object.getOwnPropertyDescriptor(win, "opener");
+    assert_equals(desc.value, val);
+    assert_true(desc.writable);
+    assert_true(desc.enumerable);
+    assert_true(desc.configurable);
+
+    openerSet("x");
+    assert_equals(win.opener, "x");
+  }, "Setting window.opener to " + String(val)); // String() needed for symbols
+});
diff --git a/testing/web-platform/tests/html/browsers/windows/auxiliary-browsing-contexts/opener.html b/testing/web-platform/tests/html/browsers/windows/auxiliary-browsing-contexts/opener.html
new file mode 100644
index 0000000000..c43d3bd3bf
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/auxiliary-browsing-contexts/opener.html
@@ -0,0 +1,55 @@
+
+
+  
+    Auxiliary Browsing Contexts: window.opener
+    
+    
+    
+  
+  
+    

+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/windows/auxiliary-browsing-contexts/resources/close-opener.html b/testing/web-platform/tests/html/browsers/windows/auxiliary-browsing-contexts/resources/close-opener.html
new file mode 100644
index 0000000000..f41773ed2c
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/auxiliary-browsing-contexts/resources/close-opener.html
@@ -0,0 +1,30 @@
+
+
+
+
+
This window should close its opener.

+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/auxiliary-browsing-contexts/resources/message-window-opener.html b/testing/web-platform/tests/html/browsers/windows/auxiliary-browsing-contexts/resources/message-window-opener.html
new file mode 100644
index 0000000000..8105650b61
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/auxiliary-browsing-contexts/resources/message-window-opener.html
@@ -0,0 +1,14 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/auxiliary-browsing-contexts/resources/multiple-opener.html b/testing/web-platform/tests/html/browsers/windows/auxiliary-browsing-contexts/resources/multiple-opener.html
new file mode 100644
index 0000000000..2e63b9f4c6
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/auxiliary-browsing-contexts/resources/multiple-opener.html
@@ -0,0 +1,32 @@
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/auxiliary-browsing-contexts/resources/no-opener.html b/testing/web-platform/tests/html/browsers/windows/auxiliary-browsing-contexts/resources/no-opener.html
new file mode 100644
index 0000000000..afd72f948d
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/auxiliary-browsing-contexts/resources/no-opener.html
@@ -0,0 +1,16 @@
+
+
+
+
This window should have no opener.

+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/auxiliary-browsing-contexts/resources/open-closer.html b/testing/web-platform/tests/html/browsers/windows/auxiliary-browsing-contexts/resources/open-closer.html
new file mode 100644
index 0000000000..7575c7c95f
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/auxiliary-browsing-contexts/resources/open-closer.html
@@ -0,0 +1,17 @@
+
+
+
+
+Open auxiliary context that will close this window (its opener)
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/auxiliary-browsing-contexts/resources/opener-setter.html b/testing/web-platform/tests/html/browsers/windows/auxiliary-browsing-contexts/resources/opener-setter.html
new file mode 100644
index 0000000000..4112dae0ce
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/auxiliary-browsing-contexts/resources/opener-setter.html
@@ -0,0 +1,23 @@
+
+
+
+
This window should set the window.opener attribute

+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/browsing-context-names/choose-_blank-001.html b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/choose-_blank-001.html
new file mode 100644
index 0000000000..a1416f2eb8
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/choose-_blank-001.html
@@ -0,0 +1,35 @@
+
+
+HTML Test: Browsing context - `_blank` name keyword
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/windows/browsing-context-names/choose-_blank-002.html b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/choose-_blank-002.html
new file mode 100644
index 0000000000..aba9d52ba0
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/choose-_blank-002.html
@@ -0,0 +1,21 @@
+
+Link with target=_blank, rel=noreferrer
+
+
+
+

+Link
+
diff --git a/testing/web-platform/tests/html/browsers/windows/browsing-context-names/choose-_blank-003.html b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/choose-_blank-003.html
new file mode 100644
index 0000000000..5571344c85
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/choose-_blank-003.html
@@ -0,0 +1,20 @@
+
+Link with target=_blank, no rel
+
+
+
+

+Link
+
diff --git a/testing/web-platform/tests/html/browsers/windows/browsing-context-names/choose-_parent-001.html b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/choose-_parent-001.html
new file mode 100644
index 0000000000..35cbc101c7
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/choose-_parent-001.html
@@ -0,0 +1,15 @@
+
+
+HTML Test: Choose browsing context - '_parent'
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/browsing-context-names/choose-_parent-002.html b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/choose-_parent-002.html
new file mode 100644
index 0000000000..7b7d561030
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/choose-_parent-002.html
@@ -0,0 +1,17 @@
+
+
+HTML Test: Choose browsing context - '_parent' (nested contexts)
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/windows/browsing-context-names/choose-_parent-003.html b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/choose-_parent-003.html
new file mode 100644
index 0000000000..20dc9b0d2a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/choose-_parent-003.html
@@ -0,0 +1,17 @@
+
+
+HTML Test: Choose browsing context - '_parent' (via window.open)
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/windows/browsing-context-names/choose-_parent-004.html b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/choose-_parent-004.html
new file mode 100644
index 0000000000..c79378018a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/choose-_parent-004.html
@@ -0,0 +1,40 @@
+
+
+HTML Test: Choose browsing context - '_parent' (case-sensitivity)
+
+
+
+
+

+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/browsing-context-names/choose-_self-001.html b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/choose-_self-001.html
new file mode 100644
index 0000000000..ed7666846d
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/choose-_self-001.html
@@ -0,0 +1,15 @@
+
+
+HTML Test: Choose browsing context - the given name is '_self'
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/browsing-context-names/choose-_self-002.html b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/choose-_self-002.html
new file mode 100644
index 0000000000..2e798f5493
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/choose-_self-002.html
@@ -0,0 +1,46 @@
+
+
+HTML Test: Choose browsing context - '_self' (case-sensitivity)
+
+
+
+
+

+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/browsing-context-names/choose-_top-001.html b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/choose-_top-001.html
new file mode 100644
index 0000000000..de4c6ad115
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/choose-_top-001.html
@@ -0,0 +1,34 @@
+
+HTML Test: Browsing context name - _top (current is top)
+
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/windows/browsing-context-names/choose-_top-002.html b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/choose-_top-002.html
new file mode 100644
index 0000000000..f29da80c6e
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/choose-_top-002.html
@@ -0,0 +1,33 @@
+
+HTML Test: Browsing context name - _top
+
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/windows/browsing-context-names/choose-_top-003.html b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/choose-_top-003.html
new file mode 100644
index 0000000000..e068f8cc1f
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/choose-_top-003.html
@@ -0,0 +1,39 @@
+
+
+HTML Test: Choose browsing context - '_top' (case-sensitivity)
+
+
+
+
+

+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/browsing-context-names/choose-default-001.html b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/choose-default-001.html
new file mode 100644
index 0000000000..c21159e0a6
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/choose-default-001.html
@@ -0,0 +1,23 @@
+
+
+HTML Test: Browsing context - Default name
+
+
+
+

+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/browsing-context-names/choose-default-002.html b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/choose-default-002.html
new file mode 100644
index 0000000000..748ee68973
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/choose-default-002.html
@@ -0,0 +1,16 @@
+
+
+HTML Test: Browsing context names - empty string
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/browsing-context-names/choose-existing-001.html b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/choose-existing-001.html
new file mode 100644
index 0000000000..fdf74b8a79
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/choose-existing-001.html
@@ -0,0 +1,17 @@
+
+
+HTML Test: Choose browsing context - the given name is same as an existing browsing context's name
+
+
+
+

+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/choose-_parent-001-iframe-1.html b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/choose-_parent-001-iframe-1.html
new file mode 100644
index 0000000000..04dd74f1a5
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/choose-_parent-001-iframe-1.html
@@ -0,0 +1,5 @@
+
+
+HTML Test: browsing context name - parent
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/choose-_parent-002-iframe.html b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/choose-_parent-002-iframe.html
new file mode 100644
index 0000000000..52da8986b0
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/choose-_parent-002-iframe.html
@@ -0,0 +1,4 @@
+
+
+HTML Test: browsing context name - parent: nested context
+
diff --git a/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/choose-_parent-002-window.html b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/choose-_parent-002-window.html
new file mode 100644
index 0000000000..558193742f
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/choose-_parent-002-window.html
@@ -0,0 +1,12 @@
+
+
+HTML Test: browsing context name - parent: top-level context
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/choose-_parent-003-iframe.html b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/choose-_parent-003-iframe.html
new file mode 100644
index 0000000000..1412dc2e79
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/choose-_parent-003-iframe.html
@@ -0,0 +1,6 @@
+
+
+HTML Test: browsing context name - parent
+
diff --git a/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/choose-_parent-003-window.html b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/choose-_parent-003-window.html
new file mode 100644
index 0000000000..bd1802aed6
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/choose-_parent-003-window.html
@@ -0,0 +1,4 @@
+
+
+HTML Test: browsing context name - parent: top-level context (gets replaced)
+
diff --git a/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/choose-_parent-004-iframe-1.html b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/choose-_parent-004-iframe-1.html
new file mode 100644
index 0000000000..7a8cbecb27
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/choose-_parent-004-iframe-1.html
@@ -0,0 +1,14 @@
+
+
+HTML Test: browsing context name - parent
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/choose-_parent-004-iframe-2.html b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/choose-_parent-004-iframe-2.html
new file mode 100644
index 0000000000..33ead5a538
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/choose-_parent-004-iframe-2.html
@@ -0,0 +1,9 @@
+
+
+HTML Test: browsing context name - parent (case-insensitive)
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/choose-_self-001-iframe.html b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/choose-_self-001-iframe.html
new file mode 100644
index 0000000000..0ad79d6e16
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/choose-_self-001-iframe.html
@@ -0,0 +1,9 @@
+
+
+HTML Test: browsing context name - self
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/choose-_self-002-iframe.html b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/choose-_self-002-iframe.html
new file mode 100644
index 0000000000..9d88305e09
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/choose-_self-002-iframe.html
@@ -0,0 +1,11 @@
+
+
+HTML Test: browsing context name - self (case-insensitive)
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/choose-_top-002-window.html b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/choose-_top-002-window.html
new file mode 100644
index 0000000000..d71384b72f
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/choose-_top-002-window.html
@@ -0,0 +1,16 @@
+
+
+
+HTML Test: browsing context name - _top
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/choose-_top-003-iframe-1.html b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/choose-_top-003-iframe-1.html
new file mode 100644
index 0000000000..aecc2fd88a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/choose-_top-003-iframe-1.html
@@ -0,0 +1,15 @@
+
+
+HTML Test: browsing context name - top (case-insensitive)
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/choose-_top-003-iframe-2.html b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/choose-_top-003-iframe-2.html
new file mode 100644
index 0000000000..a1a7e1dda7
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/choose-_top-003-iframe-2.html
@@ -0,0 +1,10 @@
+
+
+HTML Test: browsing context name - top (case-insensitive)
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/choose-default-002-iframe.html b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/choose-default-002-iframe.html
new file mode 100644
index 0000000000..567e4ea310
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/choose-default-002-iframe.html
@@ -0,0 +1,17 @@
+
+
+
+HTML Test: browsing context name - Empty string
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/choose-existing-001-iframe.html b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/choose-existing-001-iframe.html
new file mode 100644
index 0000000000..cb0b554854
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/choose-existing-001-iframe.html
@@ -0,0 +1,7 @@
+
+
+This is a test page
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/open-in-_parent.html b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/open-in-_parent.html
new file mode 100644
index 0000000000..81d0735c60
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/open-in-_parent.html
@@ -0,0 +1,9 @@
+
+
+HTML Test: browsing context name - parent
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/open-in-_top.html b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/open-in-_top.html
new file mode 100644
index 0000000000..929d52d15e
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/open-in-_top.html
@@ -0,0 +1,9 @@
+
+
+
+HTML Test: browsing context name - _top
+
diff --git a/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/post-to-opener.html b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/post-to-opener.html
new file mode 100644
index 0000000000..3e9b7aaccb
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/post-to-opener.html
@@ -0,0 +1,12 @@
+
+
+HTML Test: post window's name to top browsing context
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/post-to-top.html b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/post-to-top.html
new file mode 100644
index 0000000000..aebb57b019
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/post-to-top.html
@@ -0,0 +1,10 @@
+
+
+HTML Test: post window's name to top browsing context
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/report-has-opener.html b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/report-has-opener.html
new file mode 100644
index 0000000000..37d8cedc6d
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/report-has-opener.html
@@ -0,0 +1,8 @@
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/report-is-top.html b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/report-is-top.html
new file mode 100644
index 0000000000..8711235982
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/browsing-context-names/resources/report-is-top.html
@@ -0,0 +1,10 @@
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/browsing-context-window.html b/testing/web-platform/tests/html/browsers/windows/browsing-context-window.html
new file mode 100644
index 0000000000..f4f3c715ac
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/browsing-context-window.html
@@ -0,0 +1,37 @@
+
+
+  
+    HTML Test: Newly-Created browsing context Window and `this`
+    
+    
+    
+    
+  
+  
+    

+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/windows/browsing-context.html b/testing/web-platform/tests/html/browsers/windows/browsing-context.html
new file mode 100644
index 0000000000..59367b0428
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/browsing-context.html
@@ -0,0 +1,48 @@
+
+
+  
+    HTML Test: Browsing context is first created
+    
+    
+    
+  
+  
+    

+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/windows/clear-window-name.https.html b/testing/web-platform/tests/html/browsers/windows/clear-window-name.https.html
new file mode 100644
index 0000000000..698de8a1ca
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/clear-window-name.https.html
@@ -0,0 +1,122 @@
+
+
+
+  Clear window.name when cross-origin
+  
+  
+  
+  
+
+
+  
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/dangling-markup-window-name.html b/testing/web-platform/tests/html/browsers/windows/dangling-markup-window-name.html
new file mode 100644
index 0000000000..1bc8bb9f7f
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/dangling-markup-window-name.html
@@ -0,0 +1,97 @@
+
+
+
+  Dangling Markup in target
+  
+  
+  
+  
+
+
+  
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/document-domain-nested-navigate.window.js b/testing/web-platform/tests/html/browsers/windows/document-domain-nested-navigate.window.js
new file mode 100644
index 0000000000..f51eed5ca9
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/document-domain-nested-navigate.window.js
@@ -0,0 +1,16 @@
+async_test(t => {
+  // Setting document.domain makes this document cross-origin with that of the frame. However,
+  // about:blank will end up reusing the origin of this document, at which point the frame's
+  // document is no longer cross-origin.
+  const frame = document.body.appendChild(document.createElement('iframe'));
+  document.domain = document.domain;
+  frame.src = "/common/blank.html";
+  frame.onload = t.step_func(() => {
+    assert_throws_dom("SecurityError", () => window[0].document);
+    frame.src = "about:blank";
+    frame.onload = t.step_func_done(() => {
+      // Ensure we can access the child browsing context after navigation to non-initial about:blank
+      assert_equals(window[0].document, frame.contentDocument);
+    });
+  });
+}, "Navigated frame to about:blank and document.domain");
diff --git a/testing/web-platform/tests/html/browsers/windows/document-domain-nested-set.window.js b/testing/web-platform/tests/html/browsers/windows/document-domain-nested-set.window.js
new file mode 100644
index 0000000000..13c0d50ba0
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/document-domain-nested-set.window.js
@@ -0,0 +1,10 @@
+test(() => {
+  // As the initial:about frame document reuses the origin of this document, setting document.domain
+  // from the frame, resulting in a origin mutation, has no effect on these documents being able to
+  // reach each other, as they share the same "physical" origin.
+  document.body.appendChild(document.createElement('iframe'));
+  const script = document.createElement("script");
+  script.text = "document.domain = document.domain";
+  window[0].document.body.appendChild(script);
+  assert_equals(window[0].document.body.localName, "body");
+}, "Initial about:blank frame and document.domain in the frame");
diff --git a/testing/web-platform/tests/html/browsers/windows/document-domain-nested.window.js b/testing/web-platform/tests/html/browsers/windows/document-domain-nested.window.js
new file mode 100644
index 0000000000..2e39d05f03
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/document-domain-nested.window.js
@@ -0,0 +1,9 @@
+test(() => {
+  // As the initial:about frame document reuses the origin of this document, setting document.domain
+  // from this document, resulting in a origin mutation, has no effect on these documents being able
+  // to reach each other, as they share the same "physical" origin.
+  document.body.appendChild(document.createElement('iframe'));
+  document.domain = document.domain;
+  // Ensure we can still access the child browsing context
+  assert_equals(window[0].document.body.localName, "body");
+}, "Initial about:blank frame and document.domain");
diff --git a/testing/web-platform/tests/html/browsers/windows/document-domain-removed-iframe.html b/testing/web-platform/tests/html/browsers/windows/document-domain-removed-iframe.html
new file mode 100644
index 0000000000..7403ebfaad
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/document-domain-removed-iframe.html
@@ -0,0 +1,72 @@
+
+
+document.domain and removed iframe interaction
+
+
+
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/embedded-opener-a-form.html b/testing/web-platform/tests/html/browsers/windows/embedded-opener-a-form.html
new file mode 100644
index 0000000000..e1ec760b92
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/embedded-opener-a-form.html
@@ -0,0 +1,30 @@
+
+opener and embedded documents; using a and form
+
+
+

+
+<a>
+

+
diff --git a/testing/web-platform/tests/html/browsers/windows/embedded-opener-remove-frame.html b/testing/web-platform/tests/html/browsers/windows/embedded-opener-remove-frame.html
new file mode 100644
index 0000000000..a66f52e5f6
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/embedded-opener-remove-frame.html
@@ -0,0 +1,66 @@
+
+opener and discarded browsing contexts
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/embedded-opener.html b/testing/web-platform/tests/html/browsers/windows/embedded-opener.html
new file mode 100644
index 0000000000..8e02664342
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/embedded-opener.html
@@ -0,0 +1,32 @@
+
+opener and embedded documents; using window.open()
+
+
+

+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/iframe-cross-origin-print.sub.html b/testing/web-platform/tests/html/browsers/windows/iframe-cross-origin-print.sub.html
new file mode 100644
index 0000000000..d07db13776
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/iframe-cross-origin-print.sub.html
@@ -0,0 +1,6 @@
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/iframe-cross-origin-scaled-print.sub.html b/testing/web-platform/tests/html/browsers/windows/iframe-cross-origin-scaled-print.sub.html
new file mode 100644
index 0000000000..2442563082
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/iframe-cross-origin-scaled-print.sub.html
@@ -0,0 +1,17 @@
+
+
+
+

+
+

diff --git a/testing/web-platform/tests/html/browsers/windows/iframe-nested-print-ref.html b/testing/web-platform/tests/html/browsers/windows/iframe-nested-print-ref.html
new file mode 100644
index 0000000000..c36c459881
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/iframe-nested-print-ref.html
@@ -0,0 +1,9 @@
+
+
+
PASS
diff --git a/testing/web-platform/tests/html/browsers/windows/iframe-nested-print.html b/testing/web-platform/tests/html/browsers/windows/iframe-nested-print.html
new file mode 100644
index 0000000000..844f6ba373
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/iframe-nested-print.html
@@ -0,0 +1,6 @@
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/iframe-nested-scaled-print-ref.html b/testing/web-platform/tests/html/browsers/windows/iframe-nested-scaled-print-ref.html
new file mode 100644
index 0000000000..fceaf1e52c
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/iframe-nested-scaled-print-ref.html
@@ -0,0 +1,15 @@
+
+
+

+
+

diff --git a/testing/web-platform/tests/html/browsers/windows/nested-browsing-contexts/frameElement-siblings.sub.html b/testing/web-platform/tests/html/browsers/windows/nested-browsing-contexts/frameElement-siblings.sub.html
new file mode 100644
index 0000000000..0c814d26d9
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/nested-browsing-contexts/frameElement-siblings.sub.html
@@ -0,0 +1,42 @@
+
+
+window.frameElement access to a same-origin-domain sibling
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/nested-browsing-contexts/frameElement.sub.html b/testing/web-platform/tests/html/browsers/windows/nested-browsing-contexts/frameElement.sub.html
new file mode 100644
index 0000000000..7ea1182081
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/nested-browsing-contexts/frameElement.sub.html
@@ -0,0 +1,66 @@
+
+
+  
+    
+    HTML Test: window.frameElement
+    
+    
+    
+  
+  
+    
+    
+    
+    
+    
+
+    
+    
+
+    
+    
+
+    
+  
+
diff --git a/testing/web-platform/tests/html/browsers/windows/nested-browsing-contexts/name-attribute.window.js b/testing/web-platform/tests/html/browsers/windows/nested-browsing-contexts/name-attribute.window.js
new file mode 100644
index 0000000000..69908af71b
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/nested-browsing-contexts/name-attribute.window.js
@@ -0,0 +1,58 @@
+// META: script=/common/get-host-info.sub.js
+
+[
+  "frame", // This works without , so great
+  "iframe",
+  "object",
+  "embed",
+].forEach(element => {
+  [
+    null,
+    "",
+    "initialvalue"
+  ].forEach(initialNameValue => {
+    [
+      "same-origin",
+      "cross-origin"
+    ].forEach(originType => {
+      async_test(t => {
+        const ident = element + initialNameValue + originType,
+              file = `${new URL("resources/post-to-parent.html", location.href).pathname}?ident=${ident}`,
+              child = originType === "same-origin" ? file : `${get_host_info().HTTP_REMOTE_ORIGIN}${file}`,
+              frame = document.createElement(element),
+              expectedNameValue = initialNameValue || "";
+        let state = "set";
+        const listener = t.step_func(e => {
+          if (e.data.ident === ident) {
+            assert_equals(e.data.name, expectedNameValue); // This check is always the same
+            if (state === "set") {
+              frame.setAttribute("name", "meh");
+              state = "remove"
+              e.source.postMessage(null, "*");
+              return;
+            }
+            if (state === "remove") {
+              frame.removeAttribute("name");
+              state = "done";
+              e.source.postMessage(null, "*");
+              return;
+            }
+            if (state === "done") {
+              t.done();
+            }
+          }
+        });
+        frame.setAttribute(element === "object" ? "data" : "src", child);
+        if (initialNameValue !== null) {
+          frame.setAttribute("name", initialNameValue);
+        }
+        t.add_cleanup(() => {
+          self.removeEventListener("message", listener);
+          frame.remove();
+        });
+        self.addEventListener("message", listener);
+        document.body.append(frame);
+      }, `${originType} <${element}${initialNameValue !== null ? ' name=' + initialNameValue : ''}>`);
+    });
+  });
+});
diff --git a/testing/web-platform/tests/html/browsers/windows/nested-browsing-contexts/resources/frameElement-nested-frame.html b/testing/web-platform/tests/html/browsers/windows/nested-browsing-contexts/resources/frameElement-nested-frame.html
new file mode 100644
index 0000000000..d066b8d4cb
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/nested-browsing-contexts/resources/frameElement-nested-frame.html
@@ -0,0 +1,7 @@
+
+
+HTML Test: child browsing context created by the frame element
+
+
+  
+
diff --git a/testing/web-platform/tests/html/browsers/windows/nested-browsing-contexts/resources/frameElement-sibling-accessed.html b/testing/web-platform/tests/html/browsers/windows/nested-browsing-contexts/resources/frameElement-sibling-accessed.html
new file mode 100644
index 0000000000..15245981ce
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/nested-browsing-contexts/resources/frameElement-sibling-accessed.html
@@ -0,0 +1,16 @@
+
+
+This page will set its document.domain on request so that its sibling can access it
+
+
I did get loaded

+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/nested-browsing-contexts/resources/frameElement-sibling-accessor.html b/testing/web-platform/tests/html/browsers/windows/nested-browsing-contexts/resources/frameElement-sibling-accessor.html
new file mode 100644
index 0000000000..4b4c7a87bb
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/nested-browsing-contexts/resources/frameElement-sibling-accessor.html
@@ -0,0 +1,33 @@
+
+
+This page will attempt to access the frameElement of its sibling and report the results on request
+
+
I did get loaded

+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/nested-browsing-contexts/resources/frameElement-window-post.html b/testing/web-platform/tests/html/browsers/windows/nested-browsing-contexts/resources/frameElement-window-post.html
new file mode 100644
index 0000000000..d67bde26f4
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/nested-browsing-contexts/resources/frameElement-window-post.html
@@ -0,0 +1,14 @@
+
+
+Testcase 3: frameElement attribute must return null if the container\'s document does not have the same effective script origin
+
diff --git a/testing/web-platform/tests/html/browsers/windows/nested-browsing-contexts/resources/post-to-opener.html b/testing/web-platform/tests/html/browsers/windows/nested-browsing-contexts/resources/post-to-opener.html
new file mode 100644
index 0000000000..65a825f573
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/nested-browsing-contexts/resources/post-to-opener.html
@@ -0,0 +1,7 @@
+
diff --git a/testing/web-platform/tests/html/browsers/windows/nested-browsing-contexts/resources/post-to-parent.html b/testing/web-platform/tests/html/browsers/windows/nested-browsing-contexts/resources/post-to-parent.html
new file mode 100644
index 0000000000..302e9d9cc1
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/nested-browsing-contexts/resources/post-to-parent.html
@@ -0,0 +1,6 @@
+
diff --git a/testing/web-platform/tests/html/browsers/windows/nested-browsing-contexts/window-parent-null.html b/testing/web-platform/tests/html/browsers/windows/nested-browsing-contexts/window-parent-null.html
new file mode 100644
index 0000000000..428312086e
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/nested-browsing-contexts/window-parent-null.html
@@ -0,0 +1,66 @@
+
+
+window.parent: `null`
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/windows/nested-browsing-contexts/window-parent.html b/testing/web-platform/tests/html/browsers/windows/nested-browsing-contexts/window-parent.html
new file mode 100644
index 0000000000..ef662dca5e
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/nested-browsing-contexts/window-parent.html
@@ -0,0 +1,44 @@
+
+
+window.parent
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/windows/nested-browsing-contexts/window-top-null.html b/testing/web-platform/tests/html/browsers/windows/nested-browsing-contexts/window-top-null.html
new file mode 100644
index 0000000000..cf7fcf2ae1
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/nested-browsing-contexts/window-top-null.html
@@ -0,0 +1,66 @@
+
+
+window.top: `null`
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/windows/nested-browsing-contexts/window-top.html b/testing/web-platform/tests/html/browsers/windows/nested-browsing-contexts/window-top.html
new file mode 100644
index 0000000000..e5590adeb8
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/nested-browsing-contexts/window-top.html
@@ -0,0 +1,65 @@
+
+
+window.top
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/windows/noreferrer-cross-origin-close-manual.sub.html b/testing/web-platform/tests/html/browsers/windows/noreferrer-cross-origin-close-manual.sub.html
new file mode 100644
index 0000000000..8e2740c268
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/noreferrer-cross-origin-close-manual.sub.html
@@ -0,0 +1,3 @@
+
+
Follow this link to open a new browsing context and then confirm it can be closed:
+link.
diff --git a/testing/web-platform/tests/html/browsers/windows/noreferrer-cross-origin-manual.html b/testing/web-platform/tests/html/browsers/windows/noreferrer-cross-origin-manual.html
new file mode 100644
index 0000000000..f5879ee6d7
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/noreferrer-cross-origin-manual.html
@@ -0,0 +1,10 @@
+
    
+ 
  1. After clicking these two links in order a single browsing context should be open showing
+ example.org:
+ one,
+ two.
+
+ 
  2. After clicking these two links two browsing contexts should have been opened:
+ one,
+ two.
+

diff --git a/testing/web-platform/tests/html/browsers/windows/noreferrer-cross-origin-window-name-manual.sub.html b/testing/web-platform/tests/html/browsers/windows/noreferrer-cross-origin-window-name-manual.sub.html
new file mode 100644
index 0000000000..c598ffbfaa
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/noreferrer-cross-origin-window-name-manual.sub.html
@@ -0,0 +1,3 @@
+
+
Follow this link to open a new browsing context and then confirm it says "idonteven":
+link.
diff --git a/testing/web-platform/tests/html/browsers/windows/noreferrer-null-opener.html b/testing/web-platform/tests/html/browsers/windows/noreferrer-null-opener.html
new file mode 100644
index 0000000000..f308abc05e
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/noreferrer-null-opener.html
@@ -0,0 +1,25 @@
+
+rel=noreferrer nullifies window.opener
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/windows/noreferrer-window-name.html b/testing/web-platform/tests/html/browsers/windows/noreferrer-window-name.html
new file mode 100644
index 0000000000..5fe649d172
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/noreferrer-window-name.html
@@ -0,0 +1,86 @@
+
+rel=noreferrer and reuse of names
+
+
+
+

+
diff --git a/testing/web-platform/tests/html/browsers/windows/opener-cross-origin-manual.sub.html b/testing/web-platform/tests/html/browsers/windows/opener-cross-origin-manual.sub.html
new file mode 100644
index 0000000000..0c018663a2
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/opener-cross-origin-manual.sub.html
@@ -0,0 +1,10 @@
+
    
+ 
  1. Clicking this link must navigate this page to a resource that contains "THE END":
+ test
+
+ 
  2. Clicking this link must open a new browsing context that is empty:
+ test
+
+ 
  3. Clicking this link must navigate this page to a resource that contains "THE END":
+ test
+

diff --git a/testing/web-platform/tests/html/browsers/windows/opener-string.window.js b/testing/web-platform/tests/html/browsers/windows/opener-string.window.js
new file mode 100644
index 0000000000..a39c584d20
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/opener-string.window.js
@@ -0,0 +1,14 @@
+test(t => {
+  const popup = window.open();
+  t.add_cleanup(() => popup.close());
+  assert_equals(popup.opener, self, "The opener of the popup is me");
+  assert_equals(Object.getOwnPropertyDescriptor(popup, "opener").writable, undefined);
+
+  popup.opener = "blah";
+  assert_equals(popup.opener, "blah", "The popup's opener is now a string");
+  assert_equals(Object.getOwnPropertyDescriptor(popup, "opener").writable, true);
+
+  const openerGetter = Object.getOwnPropertyDescriptor(self, "opener").get;
+  const popupOpener = openerGetter.call(popup);
+  assert_equals(popupOpener, self, "The underlying opener of the popup is still me");
+}, "Setting popup.opener to a string");
diff --git a/testing/web-platform/tests/html/browsers/windows/post-message/first-party-to-first-party-cross-partition.sub.html b/testing/web-platform/tests/html/browsers/windows/post-message/first-party-to-first-party-cross-partition.sub.html
new file mode 100644
index 0000000000..f91d9403ea
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/post-message/first-party-to-first-party-cross-partition.sub.html
@@ -0,0 +1,26 @@
+
+
+postMessage: First-Party to First-Party, Cross-Partition
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/post-message/first-party-to-first-party-same-partition.html b/testing/web-platform/tests/html/browsers/windows/post-message/first-party-to-first-party-same-partition.html
new file mode 100644
index 0000000000..6fc915298b
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/post-message/first-party-to-first-party-same-partition.html
@@ -0,0 +1,26 @@
+
+
+postMessage: First-Party to First-Party, Same-Partition
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/post-message/first-party-to-third-party-cross-partition-cross-origin.sub.html b/testing/web-platform/tests/html/browsers/windows/post-message/first-party-to-third-party-cross-partition-cross-origin.sub.html
new file mode 100644
index 0000000000..de776f8381
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/post-message/first-party-to-third-party-cross-partition-cross-origin.sub.html
@@ -0,0 +1,27 @@
+
+
+postMessage: First-Party to Third-Party, Cross-Partition, Cross-Origin
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/post-message/first-party-to-third-party-cross-partition-same-origin.sub.html b/testing/web-platform/tests/html/browsers/windows/post-message/first-party-to-third-party-cross-partition-same-origin.sub.html
new file mode 100644
index 0000000000..490b647fa4
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/post-message/first-party-to-third-party-cross-partition-same-origin.sub.html
@@ -0,0 +1,27 @@
+
+
+postMessage: First-Party to Third-Party, Cross-Partition, Same-Origin
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/post-message/resources/first-party-to-first-party-cross-partition-window.html b/testing/web-platform/tests/html/browsers/windows/post-message/resources/first-party-to-first-party-cross-partition-window.html
new file mode 100644
index 0000000000..cdfa9d95ca
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/post-message/resources/first-party-to-first-party-cross-partition-window.html
@@ -0,0 +1,8 @@
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/post-message/resources/first-party-to-first-party-same-partition-window.html b/testing/web-platform/tests/html/browsers/windows/post-message/resources/first-party-to-first-party-same-partition-window.html
new file mode 100644
index 0000000000..4baf45d3c8
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/post-message/resources/first-party-to-first-party-same-partition-window.html
@@ -0,0 +1,8 @@
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/post-message/resources/first-party-to-third-party-cross-partition-cross-origin-iframe.https.html b/testing/web-platform/tests/html/browsers/windows/post-message/resources/first-party-to-third-party-cross-partition-cross-origin-iframe.https.html
new file mode 100644
index 0000000000..eef594831a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/post-message/resources/first-party-to-third-party-cross-partition-cross-origin-iframe.https.html
@@ -0,0 +1,8 @@
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/post-message/resources/first-party-to-third-party-cross-partition-cross-origin-window.sub.https.html b/testing/web-platform/tests/html/browsers/windows/post-message/resources/first-party-to-third-party-cross-partition-cross-origin-window.sub.https.html
new file mode 100644
index 0000000000..7edfbd9328
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/post-message/resources/first-party-to-third-party-cross-partition-cross-origin-window.sub.https.html
@@ -0,0 +1,6 @@
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/post-message/resources/first-party-to-third-party-cross-partition-same-origin-iframe.html b/testing/web-platform/tests/html/browsers/windows/post-message/resources/first-party-to-third-party-cross-partition-same-origin-iframe.html
new file mode 100644
index 0000000000..eb17036c8c
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/post-message/resources/first-party-to-third-party-cross-partition-same-origin-iframe.html
@@ -0,0 +1,8 @@
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/post-message/resources/first-party-to-third-party-cross-partition-same-origin-window.sub.html b/testing/web-platform/tests/html/browsers/windows/post-message/resources/first-party-to-third-party-cross-partition-same-origin-window.sub.html
new file mode 100644
index 0000000000..f99b96c466
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/post-message/resources/first-party-to-third-party-cross-partition-same-origin-window.sub.html
@@ -0,0 +1,6 @@
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/post-message/resources/third-party-to-first-party-cross-partition-cross-origin-iframe.sub.html b/testing/web-platform/tests/html/browsers/windows/post-message/resources/third-party-to-first-party-cross-partition-cross-origin-iframe.sub.html
new file mode 100644
index 0000000000..348efb3f9c
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/post-message/resources/third-party-to-first-party-cross-partition-cross-origin-iframe.sub.html
@@ -0,0 +1,17 @@
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/post-message/resources/third-party-to-first-party-cross-partition-cross-origin-window.https.html b/testing/web-platform/tests/html/browsers/windows/post-message/resources/third-party-to-first-party-cross-partition-cross-origin-window.https.html
new file mode 100644
index 0000000000..0045909494
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/post-message/resources/third-party-to-first-party-cross-partition-cross-origin-window.https.html
@@ -0,0 +1,8 @@
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/post-message/resources/third-party-to-first-party-cross-partition-same-origin-iframe.sub.html b/testing/web-platform/tests/html/browsers/windows/post-message/resources/third-party-to-first-party-cross-partition-same-origin-iframe.sub.html
new file mode 100644
index 0000000000..405b1053d3
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/post-message/resources/third-party-to-first-party-cross-partition-same-origin-iframe.sub.html
@@ -0,0 +1,17 @@
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/post-message/resources/third-party-to-first-party-cross-partition-same-origin-window.html b/testing/web-platform/tests/html/browsers/windows/post-message/resources/third-party-to-first-party-cross-partition-same-origin-window.html
new file mode 100644
index 0000000000..0ae51e3fc1
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/post-message/resources/third-party-to-first-party-cross-partition-same-origin-window.html
@@ -0,0 +1,8 @@
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/post-message/resources/third-party-to-third-party-cross-partition-cross-origin-iframe-a.sub.html b/testing/web-platform/tests/html/browsers/windows/post-message/resources/third-party-to-third-party-cross-partition-cross-origin-iframe-a.sub.html
new file mode 100644
index 0000000000..a11f3640e8
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/post-message/resources/third-party-to-third-party-cross-partition-cross-origin-iframe-a.sub.html
@@ -0,0 +1,17 @@
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/post-message/resources/third-party-to-third-party-cross-partition-cross-origin-iframe-b.https.html b/testing/web-platform/tests/html/browsers/windows/post-message/resources/third-party-to-third-party-cross-partition-cross-origin-iframe-b.https.html
new file mode 100644
index 0000000000..f56e2b35d8
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/post-message/resources/third-party-to-third-party-cross-partition-cross-origin-iframe-b.https.html
@@ -0,0 +1,8 @@
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/post-message/resources/third-party-to-third-party-cross-partition-cross-origin-window.sub.https.html b/testing/web-platform/tests/html/browsers/windows/post-message/resources/third-party-to-third-party-cross-partition-cross-origin-window.sub.https.html
new file mode 100644
index 0000000000..1307287587
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/post-message/resources/third-party-to-third-party-cross-partition-cross-origin-window.sub.https.html
@@ -0,0 +1,6 @@
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/post-message/resources/third-party-to-third-party-cross-partition-same-origin-iframe-a.sub.https.html b/testing/web-platform/tests/html/browsers/windows/post-message/resources/third-party-to-third-party-cross-partition-same-origin-iframe-a.sub.https.html
new file mode 100644
index 0000000000..ec551bfdec
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/post-message/resources/third-party-to-third-party-cross-partition-same-origin-iframe-a.sub.https.html
@@ -0,0 +1,17 @@
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/post-message/resources/third-party-to-third-party-cross-partition-same-origin-iframe-b.https.html b/testing/web-platform/tests/html/browsers/windows/post-message/resources/third-party-to-third-party-cross-partition-same-origin-iframe-b.https.html
new file mode 100644
index 0000000000..fc15b1f125
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/post-message/resources/third-party-to-third-party-cross-partition-same-origin-iframe-b.https.html
@@ -0,0 +1,8 @@
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/post-message/resources/third-party-to-third-party-cross-partition-same-origin-window.sub.https.html b/testing/web-platform/tests/html/browsers/windows/post-message/resources/third-party-to-third-party-cross-partition-same-origin-window.sub.https.html
new file mode 100644
index 0000000000..f26f709db3
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/post-message/resources/third-party-to-third-party-cross-partition-same-origin-window.sub.https.html
@@ -0,0 +1,6 @@
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/post-message/resources/third-party-to-third-party-same-partition-iframe-a.sub.html b/testing/web-platform/tests/html/browsers/windows/post-message/resources/third-party-to-third-party-same-partition-iframe-a.sub.html
new file mode 100644
index 0000000000..339dc9f06e
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/post-message/resources/third-party-to-third-party-same-partition-iframe-a.sub.html
@@ -0,0 +1,17 @@
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/post-message/resources/third-party-to-third-party-same-partition-iframe-b.html b/testing/web-platform/tests/html/browsers/windows/post-message/resources/third-party-to-third-party-same-partition-iframe-b.html
new file mode 100644
index 0000000000..daaf236bfc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/post-message/resources/third-party-to-third-party-same-partition-iframe-b.html
@@ -0,0 +1,8 @@
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/post-message/resources/third-party-to-third-party-same-partition-window.sub.html b/testing/web-platform/tests/html/browsers/windows/post-message/resources/third-party-to-third-party-same-partition-window.sub.html
new file mode 100644
index 0000000000..7cea58f235
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/post-message/resources/third-party-to-third-party-same-partition-window.sub.html
@@ -0,0 +1,6 @@
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/post-message/third-party-to-first-party-cross-partition-cross-origin.sub.html b/testing/web-platform/tests/html/browsers/windows/post-message/third-party-to-first-party-cross-partition-cross-origin.sub.html
new file mode 100644
index 0000000000..2618e966de
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/post-message/third-party-to-first-party-cross-partition-cross-origin.sub.html
@@ -0,0 +1,29 @@
+
+
+postMessage: Third-Party to First-Party, Cross-Partition, Cross-Origin
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/post-message/third-party-to-first-party-cross-partition-same-origin.sub.html b/testing/web-platform/tests/html/browsers/windows/post-message/third-party-to-first-party-cross-partition-same-origin.sub.html
new file mode 100644
index 0000000000..735b458841
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/post-message/third-party-to-first-party-cross-partition-same-origin.sub.html
@@ -0,0 +1,29 @@
+
+
+postMessage: Third-Party to First-Party, Cross-Partition, Same-Origin
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/post-message/third-party-to-third-party-cross-partition-cross-origin.sub.html b/testing/web-platform/tests/html/browsers/windows/post-message/third-party-to-third-party-cross-partition-cross-origin.sub.html
new file mode 100644
index 0000000000..1083071f7d
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/post-message/third-party-to-third-party-cross-partition-cross-origin.sub.html
@@ -0,0 +1,30 @@
+
+
+postMessage: Third-Party to Third-Party, Cross-Partition, Cross-Origin
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/post-message/third-party-to-third-party-cross-partition-same-origin.sub.html b/testing/web-platform/tests/html/browsers/windows/post-message/third-party-to-third-party-cross-partition-same-origin.sub.html
new file mode 100644
index 0000000000..9caf6c11e4
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/post-message/third-party-to-third-party-cross-partition-same-origin.sub.html
@@ -0,0 +1,30 @@
+
+
+postMessage: Third-Party to Third-Party, Cross-Partition, Same-Origin
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/post-message/third-party-to-third-party-same-partition.sub.html b/testing/web-platform/tests/html/browsers/windows/post-message/third-party-to-third-party-same-partition.sub.html
new file mode 100644
index 0000000000..c90a055268
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/post-message/third-party-to-third-party-same-partition.sub.html
@@ -0,0 +1,30 @@
+
+
+postMessage: Third-Party to Third-Party, Same-Partition
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/resources/browsing-context-window.html b/testing/web-platform/tests/html/browsers/windows/resources/browsing-context-window.html
new file mode 100644
index 0000000000..c1594f637e
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/resources/browsing-context-window.html
@@ -0,0 +1,7 @@
+
diff --git a/testing/web-platform/tests/html/browsers/windows/resources/document-domain-setter.html b/testing/web-platform/tests/html/browsers/windows/resources/document-domain-setter.html
new file mode 100644
index 0000000000..3b14255571
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/resources/document-domain-setter.html
@@ -0,0 +1,7 @@
+
+
+Helper page that sets document.domain
+
diff --git a/testing/web-platform/tests/html/browsers/windows/resources/echo-window-name.html b/testing/web-platform/tests/html/browsers/windows/resources/echo-window-name.html
new file mode 100644
index 0000000000..a437fecb2c
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/resources/echo-window-name.html
@@ -0,0 +1 @@
+
diff --git a/testing/web-platform/tests/html/browsers/windows/resources/iframe-nested-cross-origin.html b/testing/web-platform/tests/html/browsers/windows/resources/iframe-nested-cross-origin.html
new file mode 100644
index 0000000000..a1a66ed842
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/resources/iframe-nested-cross-origin.html
@@ -0,0 +1,2 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/resources/iframe-nested-printing-pass.html b/testing/web-platform/tests/html/browsers/windows/resources/iframe-nested-printing-pass.html
new file mode 100644
index 0000000000..c2dca9185f
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/resources/iframe-nested-printing-pass.html
@@ -0,0 +1,9 @@
+
+
+
+PASS
+
diff --git a/testing/web-platform/tests/html/browsers/windows/resources/message-parent.html b/testing/web-platform/tests/html/browsers/windows/resources/message-parent.html
new file mode 100644
index 0000000000..ba60618ad4
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/resources/message-parent.html
@@ -0,0 +1,5 @@
+
diff --git a/testing/web-platform/tests/html/browsers/windows/resources/nested-post-to-opener.html b/testing/web-platform/tests/html/browsers/windows/resources/nested-post-to-opener.html
new file mode 100644
index 0000000000..e92b69d7e7
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/resources/nested-post-to-opener.html
@@ -0,0 +1,12 @@
+
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/resources/noreferrer-window-name.html b/testing/web-platform/tests/html/browsers/windows/resources/noreferrer-window-name.html
new file mode 100644
index 0000000000..8c106ca886
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/resources/noreferrer-window-name.html
@@ -0,0 +1,8 @@
+
diff --git a/testing/web-platform/tests/html/browsers/windows/resources/opener-cross-origin-embed.sub.html b/testing/web-platform/tests/html/browsers/windows/resources/opener-cross-origin-embed.sub.html
new file mode 100644
index 0000000000..db0c003141
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/resources/opener-cross-origin-embed.sub.html
@@ -0,0 +1,2 @@
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/resources/opener-cross-origin-end.txt b/testing/web-platform/tests/html/browsers/windows/resources/opener-cross-origin-end.txt
new file mode 100644
index 0000000000..8b74fbab8a
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/resources/opener-cross-origin-end.txt
@@ -0,0 +1 @@
+THE END
diff --git a/testing/web-platform/tests/html/browsers/windows/resources/opener-cross-origin.html b/testing/web-platform/tests/html/browsers/windows/resources/opener-cross-origin.html
new file mode 100644
index 0000000000..7c536b9213
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/resources/opener-cross-origin.html
@@ -0,0 +1,4 @@
+
diff --git a/testing/web-platform/tests/html/browsers/windows/resources/post-to-opener.html b/testing/web-platform/tests/html/browsers/windows/resources/post-to-opener.html
new file mode 100644
index 0000000000..453fec97a7
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/resources/post-to-opener.html
@@ -0,0 +1,8 @@
+
diff --git a/testing/web-platform/tests/html/browsers/windows/resources/restore-window-name-back.sub.html b/testing/web-platform/tests/html/browsers/windows/resources/restore-window-name-back.sub.html
new file mode 100644
index 0000000000..ea2c3a92b4
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/resources/restore-window-name-back.sub.html
@@ -0,0 +1,7 @@
+
+
\ No newline at end of file
diff --git a/testing/web-platform/tests/html/browsers/windows/resources/restore-window-name.sub.html b/testing/web-platform/tests/html/browsers/windows/resources/restore-window-name.sub.html
new file mode 100644
index 0000000000..a1e573a7c0
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/resources/restore-window-name.sub.html
@@ -0,0 +1,43 @@
+
+
+
+popup helper for restore window.name test
+
+
+
+  
Please first click the 'start test' link. And then, click the 'Verify Result' button to verify the result. You should get a PASS after clicking the button

+  start test

+  
+  Result: 
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/resources/target-cross-origin.sub.html b/testing/web-platform/tests/html/browsers/windows/resources/target-cross-origin.sub.html
new file mode 100644
index 0000000000..8472f96b90
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/resources/target-cross-origin.sub.html
@@ -0,0 +1,3 @@
+
+
Follow this link to open a new browsing context in a separate origin.
+link.
diff --git a/testing/web-platform/tests/html/browsers/windows/resources/window-close-button.html b/testing/web-platform/tests/html/browsers/windows/resources/window-close-button.html
new file mode 100644
index 0000000000..38ec2aef5c
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/resources/window-close-button.html
@@ -0,0 +1 @@
+
Clicking this button should close this browsing context: 
diff --git a/testing/web-platform/tests/html/browsers/windows/resources/window-name-stash.py b/testing/web-platform/tests/html/browsers/windows/resources/window-name-stash.py
new file mode 100644
index 0000000000..411a4587bc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/resources/window-name-stash.py
@@ -0,0 +1,13 @@
+def main(request, response):
+    key = request.GET.first(b"id")
+    if request.method == "POST":
+        value = request.GET.first(b"value")
+        request.server.stash.take(key)
+        request.server.stash.put(key, value)
+        return b"OK"
+    else:
+        value = request.server.stash.take(key)
+        if value is not None:
+            return value
+        else:
+            return b"NONE"
diff --git a/testing/web-platform/tests/html/browsers/windows/resources/window-name.sub.html b/testing/web-platform/tests/html/browsers/windows/resources/window-name.sub.html
new file mode 100644
index 0000000000..9255ba3401
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/resources/window-name.sub.html
@@ -0,0 +1,102 @@
+
+popup helper
+
diff --git a/testing/web-platform/tests/html/browsers/windows/resources/window-opener.html b/testing/web-platform/tests/html/browsers/windows/resources/window-opener.html
new file mode 100644
index 0000000000..c734eb3056
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/resources/window-opener.html
@@ -0,0 +1,4 @@
+
diff --git a/testing/web-platform/tests/html/browsers/windows/restore-window-name-manual.https.html b/testing/web-platform/tests/html/browsers/windows/restore-window-name-manual.https.html
new file mode 100644
index 0000000000..13e8381e31
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/restore-window-name-manual.https.html
@@ -0,0 +1,20 @@
+
+
+
+  Restore window.name when navigating back from a cross-origin
+  
+  
+  
+
+
+  
+  
Please click the following link and follow the instructions in the page for testing

+  run test
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/targeting-cross-origin-nested-browsing-contexts.html b/testing/web-platform/tests/html/browsers/windows/targeting-cross-origin-nested-browsing-contexts.html
new file mode 100644
index 0000000000..44d4fbad6b
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/targeting-cross-origin-nested-browsing-contexts.html
@@ -0,0 +1,39 @@
+
+
+
+  
+  Targeting nested browsing contexts
+  
+  
+
+
+  
+  
+
+
diff --git a/testing/web-platform/tests/html/browsers/windows/targeting-multiple-cross-origin-manual.sub.html b/testing/web-platform/tests/html/browsers/windows/targeting-multiple-cross-origin-manual.sub.html
new file mode 100644
index 0000000000..c8f8cfbe29
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/targeting-multiple-cross-origin-manual.sub.html
@@ -0,0 +1,9 @@
+
+
Follow this link to open a new browsing context in a separate origin. Follow the instructions
+in that new window, and then come back to this window.
+link.
+
+
Once you come back to this page, follow this link.
+link.
+
+
After clicking that link, you should have three additional windows open.
diff --git a/testing/web-platform/tests/html/browsers/windows/targeting-with-embedded-null-in-target.html b/testing/web-platform/tests/html/browsers/windows/targeting-with-embedded-null-in-target.html
new file mode 100644
index 0000000000..7407248ffe
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/windows/targeting-with-embedded-null-in-target.html
@@ -0,0 +1,34 @@
+
+
+
+  
+  Targeting with embedded null in target
+  
+  
+
+
+  
+  Click me
+  
+
+
-- 
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