From 26a029d407be480d791972afb5975cf62c9360a6 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Fri, 19 Apr 2024 02:47:55 +0200
Subject: Adding upstream version 124.0.1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 .../geckoview/src/androidTest/assets/moz.build     |  78 ++++++
 .../androidTest/assets/web_extensions/.eslintrc.js |  14 +
 .../assets/web_extensions/actions/background.js    | 190 +++++++++++++
 .../actions/button/beasts-32-light.png             | Bin 0 -> 1395 bytes
 .../web_extensions/actions/button/beasts-32.png    | Bin 0 -> 1093 bytes
 .../web_extensions/actions/button/expected.png     | Bin 0 -> 1074 bytes
 .../web_extensions/actions/button/geo-19.png       | Bin 0 -> 225 bytes
 .../web_extensions/actions/button/geo-38.png       | Bin 0 -> 225 bytes
 .../assets/web_extensions/actions/button/icon.svg  |   1 +
 .../assets/web_extensions/actions/content.js       |   4 +
 .../assets/web_extensions/actions/manifest.json    |  43 +++
 .../actions/test-open-popup-browser-action.html    |  14 +
 .../actions/test-open-popup-browser-action.js      |   7 +
 .../actions/test-open-popup-page-action.html       |  14 +
 .../actions/test-open-popup-page-action.js         |   7 +
 .../actions/test-popup-messaging.html              |   9 +
 .../web_extensions/actions/test-popup-messaging.js |  24 ++
 .../assets/web_extensions/actions/test-popup.html  |   9 +
 .../assets/web_extensions/actions/test-popup.js    |   3 +
 .../assets/web_extensions/borderify-missing-id.xpi | Bin 0 -> 1827 bytes
 .../assets/web_extensions/borderify-unsigned.xpi   | Bin 0 -> 1882 bytes
 .../assets/web_extensions/borderify-unsigned.zip   | Bin 0 -> 1882 bytes
 .../assets/web_extensions/borderify.xpi            | Bin 0 -> 9221 bytes
 .../assets/web_extensions/borderify/borderify.js   |   1 +
 .../web_extensions/borderify/icons/border-48.png   | Bin 0 -> 225 bytes
 .../assets/web_extensions/borderify/icons/icon.svg |   1 +
 .../assets/web_extensions/borderify/manifest.json  |  23 ++
 .../browsing-data-built-in/background.js           |  44 +++
 .../browsing-data-built-in/manifest.json           |  15 +
 .../web_extensions/browsing-data/background.js     |   8 +
 .../web_extensions/browsing-data/manifest.json     |  15 +
 .../download-flags-false/download.js               |   3 +
 .../download-flags-false/manifest.json             |  15 +
 .../web_extensions/download-flags-true/download.js |  16 ++
 .../download-flags-true/manifest.json              |  15 +
 .../web_extensions/download-onChanged/download.js  |  18 ++
 .../download-onChanged/manifest.json               |  15 +
 .../assets/web_extensions/dummy-incompatible.xpi   | Bin 0 -> 521 bytes
 .../androidTest/assets/web_extensions/dummy.xpi    | Bin 0 -> 544 bytes
 .../assets/web_extensions/dummy/dummy.js           |   1 +
 .../assets/web_extensions/dummy/manifest.json      |  21 ++
 .../extension-page-restore/manifest.json           |  11 +
 .../extension-page-restore/tab-script.js           |   5 +
 .../web_extensions/extension-page-restore/tab.html |  10 +
 .../extension-page-update/background-script.js     |   7 +
 .../extension-page-update/manifest.json            |  21 ++
 .../extension-page-update/tab-script.js            |   2 +
 .../web_extensions/extension-page-update/tab.html  |  10 +
 .../web_extensions/extension-page-update/tabs.js   |   1 +
 .../assets/web_extensions/langpack_signed.xpi      | Bin 0 -> 4452 bytes
 .../web_extensions/messaging-content/manifest.json |  22 ++
 .../web_extensions/messaging-content/messaging.js  |  29 ++
 .../web_extensions/messaging-iframe/manifest.json  |  23 ++
 .../web_extensions/messaging-iframe/messaging.js   |  11 +
 .../assets/web_extensions/messaging/background.js  |  28 ++
 .../web_extensions/messaging/icons/border-48.png   | Bin 0 -> 225 bytes
 .../assets/web_extensions/messaging/manifest.json  |  18 ++
 .../web_extensions/notification-test/background.js |   6 +
 .../web_extensions/notification-test/manifest.json |  15 +
 .../web_extensions/openoptionspage-1/background.js |   1 +
 .../web_extensions/openoptionspage-1/manifest.json |  20 ++
 .../web_extensions/openoptionspage-2/background.js |   1 +
 .../web_extensions/openoptionspage-2/manifest.json |  20 ++
 .../web_extensions/page-history/manifest.json      |  11 +
 .../assets/web_extensions/page-history/page.html   |   9 +
 .../clickToRequestPermission.html                  |  11 +
 .../permission-request/manifest.json               |  13 +
 .../permission-request/request-permission.js       |  11 +
 .../redirect-to-android-resource/background.js     |  39 +++
 .../redirect-to-android-resource/manifest.json     |  25 ++
 .../web-accessible-script.js                       |   3 +
 .../tabs-activate-remove-2/background.js           |  16 ++
 .../tabs-activate-remove-2/manifest.json           |  15 +
 .../tabs-activate-remove/background.js             |  16 ++
 .../tabs-activate-remove/manifest.json             |  15 +
 .../web_extensions/tabs-create-2/background.js     |   4 +
 .../web_extensions/tabs-create-2/manifest.json     |  15 +
 .../tabs-create-remove/background.js               |   3 +
 .../tabs-create-remove/manifest.json               |  15 +
 .../web_extensions/tabs-create/background.js       |   1 +
 .../web_extensions/tabs-create/manifest.json       |  15 +
 .../web_extensions/tabs-remove/background.js       |   3 +
 .../web_extensions/tabs-remove/manifest.json       |  15 +
 .../test-support/TestSupportChild.sys.mjs          |  83 ++++++
 .../test-support/TestSupportProcessChild.sys.mjs   |  22 ++
 .../web_extensions/test-support/background.js      | 127 +++++++++
 .../web_extensions/test-support/manifest.json      |  42 +++
 .../assets/web_extensions/test-support/test-api.js | 256 +++++++++++++++++
 .../web_extensions/test-support/test-schema.json   | 308 +++++++++++++++++++++
 .../web_extensions/test-support/test-support.js    |  60 ++++
 .../assets/web_extensions/update-1/borderify.js    |   1 +
 .../assets/web_extensions/update-1/manifest.json   |  18 ++
 .../assets/web_extensions/update-2/borderify.js    |   1 +
 .../assets/web_extensions/update-2/manifest.json   |  17 ++
 .../web_extensions/update-postpone-1/background.js |   3 +
 .../web_extensions/update-postpone-1/borderify.js  |   1 +
 .../web_extensions/update-postpone-1/manifest.json |  21 ++
 .../web_extensions/update-postpone-2/borderify.js  |   1 +
 .../web_extensions/update-postpone-2/manifest.json |  17 ++
 .../update-with-perms-1/borderify.js               |   1 +
 .../update-with-perms-1/manifest.json              |  18 ++
 .../update-with-perms-2/borderify.js               |   1 +
 .../update-with-perms-2/manifest.json              |  18 ++
 .../www/accessibility/test-aria-comboboxes.html    |  11 +
 .../assets/www/accessibility/test-checkbox.html    |  12 +
 .../assets/www/accessibility/test-clipboard.html   |   9 +
 .../assets/www/accessibility/test-collection.html  |  21 ++
 .../assets/www/accessibility/test-expandable.html  |  13 +
 .../assets/www/accessibility/test-headings.html    |  11 +
 .../assets/www/accessibility/test-links.html       |  12 +
 .../www/accessibility/test-live-region-atomic.html |  12 +
 .../accessibility/test-live-region-descendant.html |   9 +
 .../test-live-region-image-labeled-by.html         |  15 +
 .../www/accessibility/test-live-region-image.html  |  15 +
 .../assets/www/accessibility/test-live-region.html |   9 +
 .../www/accessibility/test-local-iframe.html       |  21 ++
 .../test-move-caret-accessibility-focus.html       |   9 +
 .../assets/www/accessibility/test-mutation.html    |   9 +
 .../assets/www/accessibility/test-range.html       |  23 ++
 .../www/accessibility/test-remote-iframe.html      |  24 ++
 .../assets/www/accessibility/test-scroll.html      |  10 +
 .../assets/www/accessibility/test-selectable.html  |  22 ++
 .../www/accessibility/test-text-entry-node.html    |  11 +
 .../assets/www/accessibility/test-tree.html        |  10 +
 .../src/androidTest/assets/www/address_form.html   |  21 ++
 .../src/androidTest/assets/www/audio/owl.mp3       | Bin 0 -> 67430 bytes
 .../src/androidTest/assets/www/autoplay.html       |  11 +
 .../src/androidTest/assets/www/badVideoPath.html   |  11 +
 .../src/androidTest/assets/www/beforeunload.html   |  15 +
 .../src/androidTest/assets/www/cc_form.html        |  22 ++
 .../src/androidTest/assets/www/clickToReload.html  |  10 +
 .../src/androidTest/assets/www/clipboard_read.html |  22 ++
 .../src/androidTest/assets/www/color_grid.html     |  40 +++
 .../assets/www/color_orange_background.html        |  29 ++
 .../src/androidTest/assets/www/colors.html         |  23 ++
 .../androidTest/assets/www/context_menu_audio.html |  20 ++
 .../assets/www/context_menu_blob_buffered.html     |  44 +++
 .../assets/www/context_menu_blob_full.html         |  22 ++
 .../androidTest/assets/www/context_menu_image.html |  10 +
 .../assets/www/context_menu_image_nested.html      |  14 +
 .../androidTest/assets/www/context_menu_link.html  |  15 +
 .../androidTest/assets/www/context_menu_video.html |  12 +
 .../src/androidTest/assets/www/data_uri.html       |  14 +
 .../geckoview/src/androidTest/assets/www/dnd.html  |  27 ++
 .../src/androidTest/assets/www/download.html       |  18 ++
 .../assets/www/fedcm_accounts_endpoint.json        |  12 +
 .../androidTest/assets/www/fedcm_idp_manifest.json |  18 ++
 .../androidTest/assets/www/fedcm_idp_metadata.json |   4 +
 .../assets/www/fedcm_idtokens_endpoint.json        |   3 +
 .../src/androidTest/assets/www/fedcm_rp.html       |   8 +
 .../src/androidTest/assets/www/fixedbottom.html    |  36 +++
 .../src/androidTest/assets/www/fixedpercent.html   |  25 ++
 .../src/androidTest/assets/www/fixedvh.html        |  25 ++
 .../src/androidTest/assets/www/form_blank.html     |  20 ++
 .../src/androidTest/assets/www/forms.html          |  34 +++
 .../src/androidTest/assets/www/forms2.html         |  17 ++
 .../src/androidTest/assets/www/forms2_iframe.html  |  16 ++
 .../src/androidTest/assets/www/forms3.html         |  14 +
 .../src/androidTest/assets/www/forms4.html         |  14 +
 .../src/androidTest/assets/www/forms5.html         |  24 ++
 .../androidTest/assets/www/forms_autocomplete.html |  16 ++
 .../assets/www/forms_autocomplete_iframe.html      |  15 +
 .../src/androidTest/assets/www/forms_id_value.html |  12 +
 .../src/androidTest/assets/www/forms_iframe.html   |  58 ++++
 .../src/androidTest/assets/www/forms_xorigin.html  |  77 ++++++
 .../src/androidTest/assets/www/fullscreen.html     |   9 +
 .../assets/www/getusermedia_xorigin_container.html |  58 ++++
 .../assets/www/getusermedia_xorigin_iframe.html    |  39 +++
 .../src/androidTest/assets/www/hello.html          |  10 +
 .../src/androidTest/assets/www/hello2.html         |   9 +
 .../src/androidTest/assets/www/helloPDFWorld.pdf   | Bin 0 -> 10414 bytes
 .../src/androidTest/assets/www/hsts_header.sjs     |   6 +
 .../src/androidTest/assets/www/hungScript.html     |  16 ++
 .../iframe_100_percent_height_no_scrollable.html   |  60 ++++
 .../www/iframe_100_percent_height_scrollable.html  |  60 ++++
 .../assets/www/iframe_98vh_no_scrollable.html      |  55 ++++
 .../assets/www/iframe_98vh_scrollable.html         |  55 ++++
 .../src/androidTest/assets/www/iframe_hello.html   |  10 +
 .../androidTest/assets/www/iframe_http_only.html   |  14 +
 .../assets/www/iframe_redirect_automation.html     |  12 +
 .../assets/www/iframe_redirect_local.html          |  10 +
 .../assets/www/iframe_unknown_protocol.html        |  10 +
 .../src/androidTest/assets/www/images/test.gif     | Bin 0 -> 23961 bytes
 .../src/androidTest/assets/www/inputs.html         |  66 +++++
 .../src/androidTest/assets/www/links.html          |  28 ++
 .../src/androidTest/assets/www/loremIpsum.html     |  17 ++
 .../androidTest/assets/www/manifest.webmanifest    |  17 ++
 .../assets/www/media_session_default1.html         |  15 +
 .../androidTest/assets/www/media_session_dom1.html | 109 ++++++++
 .../src/androidTest/assets/www/metatags.html       |  19 ++
 .../src/androidTest/assets/www/mouseToReload.html  |  10 +
 .../geckoview/src/androidTest/assets/www/mp4.html  |  11 +
 .../src/androidTest/assets/www/newSession.html     |  22 ++
 .../androidTest/assets/www/newSession_child.html   |   9 +
 .../androidTest/assets/www/no-meta-viewport.html   |   5 +
 .../geckoview/src/androidTest/assets/www/ogg.html  |  11 +
 .../src/androidTest/assets/www/orange.pdf          | Bin 0 -> 16829 bytes
 .../assets/www/overscroll-behavior-auto-none.html  |  28 ++
 .../assets/www/overscroll-behavior-auto.html       |  28 ++
 .../assets/www/overscroll-behavior-none-auto.html  |  28 ++
 .../www/overscroll-behavior-none-on-non-root.html  |  37 +++
 .../src/androidTest/assets/www/popup.html          |  12 +
 .../assets/www/print_content_change.html           |  37 +++
 .../src/androidTest/assets/www/print_iframe.html   |  39 +++
 .../src/androidTest/assets/www/prompts.html        |  31 +++
 .../assets/www/pull-to-refresh-subframe.html       |  82 ++++++
 .../src/androidTest/assets/www/push/push.html      |  10 +
 .../src/androidTest/assets/www/push/push.js        |  44 +++
 .../src/androidTest/assets/www/push/sw.js          |  30 ++
 ...ground-body-fully-covered-by-green-element.html |  23 ++
 .../www/reflect_local_storage_into_title.html      |  17 ++
 .../src/androidTest/assets/www/resubmit.html       |  12 +
 .../assets/www/root_100_percent_height.html        |  37 +++
 .../src/androidTest/assets/www/root_100vh.html     |  36 +++
 .../src/androidTest/assets/www/root_98vh.html      |  36 +++
 .../src/androidTest/assets/www/saveState.html      |  18 ++
 .../src/androidTest/assets/www/scroll-handoff.html |  40 +++
 .../src/androidTest/assets/www/scroll.html         |  59 ++++
 .../src/androidTest/assets/www/select-listbox.html |   7 +
 .../androidTest/assets/www/select-multiple.html    |   7 +
 .../src/androidTest/assets/www/select.html         |   6 +
 .../assets/www/selectionAction_frame.html          |   6 +
 .../assets/www/selectionAction_frame_xorigin.html  |  47 ++++
 .../androidTest/assets/www/showDynamicToolbar.html |  96 +++++++
 .../src/androidTest/assets/www/simple_redirect.sjs |   4 +
 .../src/androidTest/assets/www/titleChange.html    |  16 ++
 .../assets/www/touch-action-wheel-listener.html    |  33 +++
 .../src/androidTest/assets/www/touch-action.html   |  48 ++++
 .../src/androidTest/assets/www/touch.html          |  58 ++++
 .../src/androidTest/assets/www/touch_xorigin.html  |  16 ++
 .../src/androidTest/assets/www/touchstart.html     |  37 +++
 .../src/androidTest/assets/www/tracemonkey.pdf     | Bin 0 -> 178030 bytes
 .../src/androidTest/assets/www/trackers.html       |  14 +
 .../assets/www/translations-tester-en.html         |  62 +++++
 .../assets/www/translations-tester-es.html         |  83 ++++++
 .../src/androidTest/assets/www/transparent.gif     | Bin 0 -> 43 bytes
 .../androidTest/assets/www/update_manifest.json    |  40 +++
 .../src/androidTest/assets/www/videos/gizmo.webm   | Bin 0 -> 159035 bytes
 .../src/androidTest/assets/www/videos/short.mp4    | Bin 0 -> 13651 bytes
 .../src/androidTest/assets/www/videos/video.ogg    | Bin 0 -> 285310 bytes
 .../src/androidTest/assets/www/viewport.html       |  19 ++
 .../geckoview/src/androidTest/assets/www/webm.html |  11 +
 .../androidTest/assets/www/worker/open_window.html |  10 +
 .../androidTest/assets/www/worker/open_window.js   |  15 +
 .../assets/www/worker/open_window_target.html      |   9 +
 .../assets/www/worker/service-worker.js            |  15 +
 246 files changed, 5411 insertions(+)
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/moz.build
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/.eslintrc.js
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/background.js
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/button/beasts-32-light.png
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/button/beasts-32.png
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/button/expected.png
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/button/geo-19.png
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/button/geo-38.png
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/button/icon.svg
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/content.js
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/manifest.json
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/test-open-popup-browser-action.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/test-open-popup-browser-action.js
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/test-open-popup-page-action.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/test-open-popup-page-action.js
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/test-popup-messaging.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/test-popup-messaging.js
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/test-popup.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/test-popup.js
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/borderify-missing-id.xpi
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/borderify-unsigned.xpi
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/borderify-unsigned.zip
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/borderify.xpi
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/borderify/borderify.js
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/borderify/icons/border-48.png
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/borderify/icons/icon.svg
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/borderify/manifest.json
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/browsing-data-built-in/background.js
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/browsing-data-built-in/manifest.json
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/browsing-data/background.js
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/browsing-data/manifest.json
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/download-flags-false/download.js
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/download-flags-false/manifest.json
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/download-flags-true/download.js
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/download-flags-true/manifest.json
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/download-onChanged/download.js
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/download-onChanged/manifest.json
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/dummy-incompatible.xpi
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/dummy.xpi
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/dummy/dummy.js
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/dummy/manifest.json
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/extension-page-restore/manifest.json
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/extension-page-restore/tab-script.js
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/extension-page-restore/tab.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/extension-page-update/background-script.js
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/extension-page-update/manifest.json
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/extension-page-update/tab-script.js
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/extension-page-update/tab.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/extension-page-update/tabs.js
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/langpack_signed.xpi
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/messaging-content/manifest.json
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/messaging-content/messaging.js
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/messaging-iframe/manifest.json
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/messaging-iframe/messaging.js
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/messaging/background.js
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/messaging/icons/border-48.png
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/messaging/manifest.json
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/notification-test/background.js
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/notification-test/manifest.json
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/openoptionspage-1/background.js
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/openoptionspage-1/manifest.json
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/openoptionspage-2/background.js
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/openoptionspage-2/manifest.json
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/page-history/manifest.json
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/page-history/page.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/permission-request/clickToRequestPermission.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/permission-request/manifest.json
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/permission-request/request-permission.js
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/redirect-to-android-resource/background.js
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/redirect-to-android-resource/manifest.json
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/redirect-to-android-resource/web-accessible-script.js
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-activate-remove-2/background.js
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-activate-remove-2/manifest.json
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-activate-remove/background.js
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-activate-remove/manifest.json
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-create-2/background.js
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-create-2/manifest.json
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-create-remove/background.js
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-create-remove/manifest.json
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-create/background.js
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-create/manifest.json
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-remove/background.js
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-remove/manifest.json
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/test-support/TestSupportChild.sys.mjs
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/test-support/TestSupportProcessChild.sys.mjs
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/test-support/background.js
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/test-support/manifest.json
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/test-support/test-api.js
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/test-support/test-schema.json
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/test-support/test-support.js
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/update-1/borderify.js
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/update-1/manifest.json
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/update-2/borderify.js
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/update-2/manifest.json
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/update-postpone-1/background.js
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/update-postpone-1/borderify.js
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/update-postpone-1/manifest.json
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/update-postpone-2/borderify.js
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/update-postpone-2/manifest.json
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/update-with-perms-1/borderify.js
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/update-with-perms-1/manifest.json
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/update-with-perms-2/borderify.js
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/web_extensions/update-with-perms-2/manifest.json
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-aria-comboboxes.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-checkbox.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-clipboard.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-collection.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-expandable.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-headings.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-links.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-live-region-atomic.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-live-region-descendant.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-live-region-image-labeled-by.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-live-region-image.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-live-region.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-local-iframe.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-move-caret-accessibility-focus.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-mutation.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-range.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-remote-iframe.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-scroll.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-selectable.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-text-entry-node.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-tree.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/address_form.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/audio/owl.mp3
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/autoplay.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/badVideoPath.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/beforeunload.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/cc_form.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/clickToReload.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/clipboard_read.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/color_grid.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/color_orange_background.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/colors.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/context_menu_audio.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/context_menu_blob_buffered.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/context_menu_blob_full.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/context_menu_image.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/context_menu_image_nested.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/context_menu_link.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/context_menu_video.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/data_uri.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/dnd.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/download.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/fedcm_accounts_endpoint.json
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/fedcm_idp_manifest.json
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/fedcm_idp_metadata.json
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/fedcm_idtokens_endpoint.json
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/fedcm_rp.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/fixedbottom.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/fixedpercent.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/fixedvh.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/form_blank.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/forms.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/forms2.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/forms2_iframe.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/forms3.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/forms4.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/forms5.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/forms_autocomplete.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/forms_autocomplete_iframe.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/forms_id_value.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/forms_iframe.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/forms_xorigin.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/fullscreen.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/getusermedia_xorigin_container.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/getusermedia_xorigin_iframe.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/hello.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/hello2.html
 create mode 100755 mobile/android/geckoview/src/androidTest/assets/www/helloPDFWorld.pdf
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/hsts_header.sjs
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/hungScript.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/iframe_100_percent_height_no_scrollable.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/iframe_100_percent_height_scrollable.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/iframe_98vh_no_scrollable.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/iframe_98vh_scrollable.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/iframe_hello.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/iframe_http_only.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/iframe_redirect_automation.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/iframe_redirect_local.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/iframe_unknown_protocol.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/images/test.gif
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/inputs.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/links.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/loremIpsum.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/manifest.webmanifest
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/media_session_default1.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/media_session_dom1.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/metatags.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/mouseToReload.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/mp4.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/newSession.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/newSession_child.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/no-meta-viewport.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/ogg.html
 create mode 100755 mobile/android/geckoview/src/androidTest/assets/www/orange.pdf
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/overscroll-behavior-auto-none.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/overscroll-behavior-auto.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/overscroll-behavior-none-auto.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/overscroll-behavior-none-on-non-root.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/popup.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/print_content_change.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/print_iframe.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/prompts.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/pull-to-refresh-subframe.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/push/push.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/push/push.js
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/push/sw.js
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/red-background-body-fully-covered-by-green-element.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/reflect_local_storage_into_title.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/resubmit.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/root_100_percent_height.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/root_100vh.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/root_98vh.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/saveState.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/scroll-handoff.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/scroll.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/select-listbox.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/select-multiple.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/select.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/selectionAction_frame.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/selectionAction_frame_xorigin.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/showDynamicToolbar.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/simple_redirect.sjs
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/titleChange.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/touch-action-wheel-listener.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/touch-action.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/touch.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/touch_xorigin.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/touchstart.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/tracemonkey.pdf
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/trackers.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/translations-tester-en.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/translations-tester-es.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/transparent.gif
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/update_manifest.json
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/videos/gizmo.webm
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/videos/short.mp4
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/videos/video.ogg
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/viewport.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/webm.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/worker/open_window.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/worker/open_window.js
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/worker/open_window_target.html
 create mode 100644 mobile/android/geckoview/src/androidTest/assets/www/worker/service-worker.js

(limited to 'mobile/android/geckoview/src/androidTest/assets')

diff --git a/mobile/android/geckoview/src/androidTest/assets/moz.build b/mobile/android/geckoview/src/androidTest/assets/moz.build
new file mode 100644
index 0000000000..12d6550f1c
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/moz.build
@@ -0,0 +1,78 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+addons = {
+    "browsing-data": [
+        "background.js",
+        "manifest.json",
+    ],
+    "tabs-activate-remove": [
+        "background.js",
+        "manifest.json",
+    ],
+    "tabs-activate-remove-2": [
+        "background.js",
+        "manifest.json",
+    ],
+    "update-1": [
+        "borderify.js",
+        "manifest.json",
+    ],
+    "update-2": [
+        "borderify.js",
+        "manifest.json",
+    ],
+    "update-postpone-1": [
+        "background.js",
+        "borderify.js",
+        "manifest.json",
+    ],
+    "update-postpone-2": [
+        "borderify.js",
+        "manifest.json",
+    ],
+    "update-with-perms-1": [
+        "borderify.js",
+        "manifest.json",
+    ],
+    "update-with-perms-2": [
+        "borderify.js",
+        "manifest.json",
+    ],
+    "page-history": [
+        "page.html",
+        "manifest.json",
+    ],
+    "download-flags-true": [
+        "download.js",
+        "manifest.json",
+    ],
+    "download-flags-false": [
+        "download.js",
+        "manifest.json",
+    ],
+    "download-onChanged": [
+        "download.js",
+        "manifest.json",
+    ],
+    "permission-request": [
+        "clickToRequestPermission.html",
+        "request-permission.js",
+        "manifest.json",
+    ],
+}
+
+for addon, files in addons.items():
+    indir = "web_extensions/%s" % addon
+    xpi = "%s.xpi" % indir
+    inputs = [indir]
+    for file in files:
+        inputs.append("%s/%s" % (indir, file))
+    GeneratedFile(
+        xpi, script="/toolkit/mozapps/extensions/test/create_xpi.py", inputs=inputs
+    )
+
+    TEST_HARNESS_FILES.testing.mochitest.tests.junit += ["!%s" % xpi]
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/.eslintrc.js b/mobile/android/geckoview/src/androidTest/assets/web_extensions/.eslintrc.js
new file mode 100644
index 0000000000..41c5ed8080
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/.eslintrc.js
@@ -0,0 +1,14 @@
+"use strict";
+
+module.exports = {
+  env: {
+    webextensions: true,
+  },
+  globals: {
+    ExtensionAPI: true,
+    // available to frameScripts
+    addMessageListener: false,
+    content: false,
+    sendAsyncMessage: false,
+  },
+};
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/background.js b/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/background.js
new file mode 100644
index 0000000000..dab0f5d897
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/background.js
@@ -0,0 +1,190 @@
+const port = browser.runtime.connectNative("browser");
+port.onMessage.addListener(message => {
+  handleMessage(message, null);
+});
+
+browser.runtime.onMessage.addListener((message, sender) => {
+  handleMessage(message, sender.tab.id);
+});
+
+browser.pageAction.onClicked.addListener(tab => {
+  port.postMessage({ method: "onClicked", tabId: tab.id, type: "pageAction" });
+});
+
+browser.browserAction.onClicked.addListener(tab => {
+  port.postMessage({
+    method: "onClicked",
+    tabId: tab.id,
+    type: "browserAction",
+  });
+});
+
+function handlePageActionMessage(message, tabId) {
+  switch (message.action) {
+    case "enable":
+      browser.pageAction.show(tabId);
+      break;
+
+    case "disable":
+      browser.pageAction.hide(tabId);
+      break;
+
+    case "setPopup":
+      browser.pageAction.setPopup({
+        tabId,
+        popup: message.popup,
+      });
+      break;
+
+    case "setPopupCheckRestrictions":
+      browser.pageAction
+        .setPopup({
+          tabId,
+          popup: message.popup,
+        })
+        .then(
+          () => {
+            port.postMessage({
+              resultFor: "setPopup",
+              type: "pageAction",
+              success: true,
+            });
+          },
+          err => {
+            port.postMessage({
+              resultFor: "setPopup",
+              type: "pageAction",
+              success: false,
+              error: String(err),
+            });
+          }
+        );
+      break;
+
+    case "setTitle":
+      browser.pageAction.setTitle({
+        tabId,
+        title: message.title,
+      });
+      break;
+
+    case "setIcon":
+      browser.pageAction.setIcon({
+        tabId,
+        imageData: message.imageData,
+        path: message.path,
+      });
+      break;
+
+    default:
+      throw new Error(`Page Action does not support ${message.action}`);
+  }
+}
+
+function handleBrowserActionMessage(message, tabId) {
+  switch (message.action) {
+    case "enable":
+      browser.browserAction.enable(tabId);
+      break;
+
+    case "disable":
+      browser.browserAction.disable(tabId);
+      break;
+
+    case "setBadgeText":
+      browser.browserAction.setBadgeText({
+        tabId,
+        text: message.text,
+      });
+      break;
+
+    case "setBadgeTextColor":
+      browser.browserAction.setBadgeTextColor({
+        tabId,
+        color: message.color,
+      });
+      break;
+
+    case "setBadgeBackgroundColor":
+      browser.browserAction.setBadgeBackgroundColor({
+        tabId,
+        color: message.color,
+      });
+      break;
+
+    case "setPopup":
+      browser.browserAction.setPopup({
+        tabId,
+        popup: message.popup,
+      });
+      break;
+
+    case "setPopupCheckRestrictions":
+      browser.browserAction
+        .setPopup({
+          tabId,
+          popup: message.popup,
+        })
+        .then(
+          () => {
+            port.postMessage({
+              resultFor: "setPopup",
+              type: "browserAction",
+              success: true,
+            });
+          },
+          err => {
+            port.postMessage({
+              resultFor: "setPopup",
+              type: "browserAction",
+              success: false,
+              error: String(err),
+            });
+          }
+        );
+      break;
+
+    case "setTitle":
+      browser.browserAction.setTitle({
+        tabId,
+        title: message.title,
+      });
+      break;
+
+    case "setIcon":
+      browser.browserAction.setIcon({
+        tabId,
+        imageData: message.imageData,
+        path: message.path,
+      });
+      break;
+
+    default:
+      throw new Error(`Browser Action does not support ${message.action}`);
+  }
+}
+
+function handleMessage(message, tabId) {
+  switch (message.type) {
+    case "ping":
+      port.postMessage({ method: "pong" });
+      return;
+
+    case "load":
+      browser.tabs.update(tabId, {
+        url: message.url,
+      });
+      return;
+
+    case "browserAction":
+      handleBrowserActionMessage(message, tabId);
+      return;
+
+    case "pageAction":
+      handlePageActionMessage(message, tabId);
+      return;
+
+    default:
+      throw new Error(`Unsupported message type ${message.type}`);
+  }
+}
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/button/beasts-32-light.png b/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/button/beasts-32-light.png
new file mode 100644
index 0000000000..dbed714c56
Binary files /dev/null and b/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/button/beasts-32-light.png differ
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/button/beasts-32.png b/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/button/beasts-32.png
new file mode 100644
index 0000000000..89863ccec7
Binary files /dev/null and b/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/button/beasts-32.png differ
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/button/expected.png b/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/button/expected.png
new file mode 100644
index 0000000000..aea2c19784
Binary files /dev/null and b/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/button/expected.png differ
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/button/geo-19.png b/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/button/geo-19.png
new file mode 100644
index 0000000000..90687de26d
Binary files /dev/null and b/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/button/geo-19.png differ
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/button/geo-38.png b/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/button/geo-38.png
new file mode 100644
index 0000000000..90687de26d
Binary files /dev/null and b/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/button/geo-38.png differ
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/button/icon.svg b/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/button/icon.svg
new file mode 100644
index 0000000000..dd1fae7d15
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/button/icon.svg
@@ -0,0 +1 @@
+<?xml version="1.0" ?><!DOCTYPE svg  PUBLIC '-//W3C//DTD SVG 1.1//EN'  'http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd'><svg enable-background="new 0 0 500 500" height="500px" id="Layer_1" version="1.1" viewBox="0 0 500 500" width="500px" xml:space="preserve" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><path clip-rule="evenodd" d="M131.889,150.061v63.597h-27.256  c-20.079,0-36.343,16.263-36.343,36.342v181.711c0,20.078,16.264,36.34,36.343,36.34h290.734c20.078,0,36.345-16.262,36.345-36.34  V250c0-20.079-16.267-36.342-36.345-36.342h-27.254v-63.597c0-65.232-52.882-118.111-118.112-118.111  S131.889,84.828,131.889,150.061z M177.317,213.658v-63.597c0-40.157,32.525-72.685,72.683-72.685  c40.158,0,72.685,32.528,72.685,72.685v63.597H177.317z M213.658,313.599c0-20.078,16.263-36.341,36.342-36.341  s36.341,16.263,36.341,36.341c0,12.812-6.634,24.079-16.625,30.529c0,0,3.55,21.446,7.542,46.699  c0,7.538-6.087,13.625-13.629,13.625h-27.258c-7.541,0-13.627-6.087-13.627-13.625l7.542-46.699  C220.294,337.678,213.658,326.41,213.658,313.599z" fill="#010101" fill-rule="evenodd"/></svg>
\ No newline at end of file
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/content.js b/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/content.js
new file mode 100644
index 0000000000..eaa2467df0
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/content.js
@@ -0,0 +1,4 @@
+const port = browser.runtime.connectNative("browser");
+port.onMessage.addListener(message => {
+  browser.runtime.sendMessage(message);
+});
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/manifest.json b/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/manifest.json
new file mode 100644
index 0000000000..21ca7c7e07
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/manifest.json
@@ -0,0 +1,43 @@
+{
+  "manifest_version": 2,
+  "name": "actions",
+  "version": "1.0",
+  "description": "Defines Page and Browser actions",
+  "browser_specific_settings": {
+    "gecko": {
+      "id": "actions@tests.mozilla.org"
+    }
+  },
+  "browser_action": {
+    "default_title": "Test action default",
+    "theme_icons": [
+      {
+        "light": "button/beasts-32-light.png",
+        "dark": "button/beasts-32.png",
+        "size": 32
+      }
+    ]
+  },
+  "page_action": {
+    "default_title": "Test action default",
+    "default_icon": {
+      "19": "button/geo-19.png",
+      "38": "button/geo-38.png"
+    }
+  },
+  "background": {
+    "scripts": ["background.js"]
+  },
+  "content_scripts": [
+    {
+      "matches": ["<all_urls>"],
+      "js": ["content.js"]
+    }
+  ],
+  "permissions": [
+    "tabs",
+    "geckoViewAddons",
+    "nativeMessaging",
+    "nativeMessagingFromContent"
+  ]
+}
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/test-open-popup-browser-action.html b/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/test-open-popup-browser-action.html
new file mode 100644
index 0000000000..dc388b8a7f
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/test-open-popup-browser-action.html
@@ -0,0 +1,14 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <script
+      type="text/javascript"
+      src="test-open-popup-browser-action.js"
+    ></script>
+  </head>
+  <body>
+    <body style="height: 100%">
+      <p>Hello, world!</p>
+    </body>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/test-open-popup-browser-action.js b/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/test-open-popup-browser-action.js
new file mode 100644
index 0000000000..cde31235ac
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/test-open-popup-browser-action.js
@@ -0,0 +1,7 @@
+window.addEventListener("DOMContentLoaded", init);
+
+function init() {
+  document.body.addEventListener("click", event => {
+    browser.browserAction.openPopup();
+  });
+}
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/test-open-popup-page-action.html b/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/test-open-popup-page-action.html
new file mode 100644
index 0000000000..3fe42d0b2e
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/test-open-popup-page-action.html
@@ -0,0 +1,14 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <script
+      type="text/javascript"
+      src="test-open-popup-page-action.js"
+    ></script>
+  </head>
+  <body>
+    <body style="height: 100%">
+      <p>Hello, world!</p>
+    </body>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/test-open-popup-page-action.js b/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/test-open-popup-page-action.js
new file mode 100644
index 0000000000..f16d96333f
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/test-open-popup-page-action.js
@@ -0,0 +1,7 @@
+window.addEventListener("DOMContentLoaded", init);
+
+function init() {
+  document.body.addEventListener("click", event => {
+    browser.pageAction.openPopup();
+  });
+}
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/test-popup-messaging.html b/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/test-popup-messaging.html
new file mode 100644
index 0000000000..f0fff977d8
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/test-popup-messaging.html
@@ -0,0 +1,9 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <script src="test-popup-messaging.js"></script>
+  </head>
+  <body>
+    <h1>HELLO</h1>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/test-popup-messaging.js b/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/test-popup-messaging.js
new file mode 100644
index 0000000000..479f957564
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/test-popup-messaging.js
@@ -0,0 +1,24 @@
+browser.runtime.sendNativeMessage("badNativeApi", "errorerrorerror");
+
+async function runTest() {
+  const response = await browser.runtime.sendNativeMessage(
+    "browser",
+    "testPopupMessage"
+  );
+
+  browser.runtime.sendNativeMessage("browser", `response: ${response}`);
+
+  const port = browser.runtime.connectNative("browser");
+  port.onMessage.addListener(response => {
+    if (response.action === "disconnect") {
+      port.disconnect();
+      return;
+    }
+
+    port.postMessage(`response: ${response.message}`);
+  });
+
+  port.postMessage("testPopupPortMessage");
+}
+
+runTest();
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/test-popup.html b/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/test-popup.html
new file mode 100644
index 0000000000..dd98313e59
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/test-popup.html
@@ -0,0 +1,9 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <script src="test-popup.js"></script>
+  </head>
+  <body>
+    <h1>HELLO</h1>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/test-popup.js b/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/test-popup.js
new file mode 100644
index 0000000000..47271e744c
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/actions/test-popup.js
@@ -0,0 +1,3 @@
+window.addEventListener("DOMContentLoaded", () => {
+  window.close();
+});
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/borderify-missing-id.xpi b/mobile/android/geckoview/src/androidTest/assets/web_extensions/borderify-missing-id.xpi
new file mode 100644
index 0000000000..19ce0d7f0f
Binary files /dev/null and b/mobile/android/geckoview/src/androidTest/assets/web_extensions/borderify-missing-id.xpi differ
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/borderify-unsigned.xpi b/mobile/android/geckoview/src/androidTest/assets/web_extensions/borderify-unsigned.xpi
new file mode 100644
index 0000000000..fd395d13df
Binary files /dev/null and b/mobile/android/geckoview/src/androidTest/assets/web_extensions/borderify-unsigned.xpi differ
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/borderify-unsigned.zip b/mobile/android/geckoview/src/androidTest/assets/web_extensions/borderify-unsigned.zip
new file mode 100644
index 0000000000..fd395d13df
Binary files /dev/null and b/mobile/android/geckoview/src/androidTest/assets/web_extensions/borderify-unsigned.zip differ
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/borderify.xpi b/mobile/android/geckoview/src/androidTest/assets/web_extensions/borderify.xpi
new file mode 100644
index 0000000000..1ed97f1047
Binary files /dev/null and b/mobile/android/geckoview/src/androidTest/assets/web_extensions/borderify.xpi differ
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/borderify/borderify.js b/mobile/android/geckoview/src/androidTest/assets/web_extensions/borderify/borderify.js
new file mode 100644
index 0000000000..9c3728b381
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/borderify/borderify.js
@@ -0,0 +1 @@
+document.body.style.border = "5px solid red";
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/borderify/icons/border-48.png b/mobile/android/geckoview/src/androidTest/assets/web_extensions/borderify/icons/border-48.png
new file mode 100644
index 0000000000..90687de26d
Binary files /dev/null and b/mobile/android/geckoview/src/androidTest/assets/web_extensions/borderify/icons/border-48.png differ
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/borderify/icons/icon.svg b/mobile/android/geckoview/src/androidTest/assets/web_extensions/borderify/icons/icon.svg
new file mode 100644
index 0000000000..dd1fae7d15
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/borderify/icons/icon.svg
@@ -0,0 +1 @@
+<?xml version="1.0" ?><!DOCTYPE svg  PUBLIC '-//W3C//DTD SVG 1.1//EN'  'http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd'><svg enable-background="new 0 0 500 500" height="500px" id="Layer_1" version="1.1" viewBox="0 0 500 500" width="500px" xml:space="preserve" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><path clip-rule="evenodd" d="M131.889,150.061v63.597h-27.256  c-20.079,0-36.343,16.263-36.343,36.342v181.711c0,20.078,16.264,36.34,36.343,36.34h290.734c20.078,0,36.345-16.262,36.345-36.34  V250c0-20.079-16.267-36.342-36.345-36.342h-27.254v-63.597c0-65.232-52.882-118.111-118.112-118.111  S131.889,84.828,131.889,150.061z M177.317,213.658v-63.597c0-40.157,32.525-72.685,72.683-72.685  c40.158,0,72.685,32.528,72.685,72.685v63.597H177.317z M213.658,313.599c0-20.078,16.263-36.341,36.342-36.341  s36.341,16.263,36.341,36.341c0,12.812-6.634,24.079-16.625,30.529c0,0,3.55,21.446,7.542,46.699  c0,7.538-6.087,13.625-13.629,13.625h-27.258c-7.541,0-13.627-6.087-13.627-13.625l7.542-46.699  C220.294,337.678,213.658,326.41,213.658,313.599z" fill="#010101" fill-rule="evenodd"/></svg>
\ No newline at end of file
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/borderify/manifest.json b/mobile/android/geckoview/src/androidTest/assets/web_extensions/borderify/manifest.json
new file mode 100644
index 0000000000..4e3daf6708
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/borderify/manifest.json
@@ -0,0 +1,23 @@
+{
+  "manifest_version": 2,
+  "name": "Borderify",
+  "version": "1.0",
+  "description": "Adds a red border to all webpages matching example.com.",
+  "browser_specific_settings": {
+    "gecko": {
+      "id": "borderify@tests.mozilla.org"
+    }
+  },
+  "icons": {
+    "48": "icons/border-48.png"
+  },
+  "content_scripts": [
+    {
+      "matches": ["*://*.example.com/*"],
+      "js": ["borderify.js"]
+    }
+  ],
+  "options_ui": {
+    "page": "dummy.html"
+  }
+}
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/browsing-data-built-in/background.js b/mobile/android/geckoview/src/androidTest/assets/web_extensions/browsing-data-built-in/background.js
new file mode 100644
index 0000000000..d0ae54b3dd
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/browsing-data-built-in/background.js
@@ -0,0 +1,44 @@
+const port = browser.runtime.connectNative("browser");
+
+async function apiCall(message) {
+  const { type, since, removalOptions, dataTypes } = message;
+  switch (type) {
+    case "clear-downloads":
+      await browser.browsingData.removeDownloads({ since });
+      break;
+    case "clear-form-data":
+      await browser.browsingData.removeFormData({ since });
+      break;
+    case "clear-history":
+      await browser.browsingData.removeHistory({ since });
+      break;
+    case "clear-passwords":
+      await browser.browsingData.removePasswords({ since });
+      break;
+    case "clear":
+      await browser.browsingData.remove(removalOptions, dataTypes);
+      break;
+    case "get-settings":
+      return browser.browsingData.settings();
+  }
+  return null;
+}
+
+port.onMessage.addListener(async message => {
+  const { uuid } = message;
+  try {
+    const result = await apiCall(message);
+    port.postMessage({
+      type: "response",
+      result,
+      uuid,
+    });
+  } catch (exception) {
+    const { message } = exception;
+    port.postMessage({
+      type: "error",
+      error: message,
+      uuid,
+    });
+  }
+});
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/browsing-data-built-in/manifest.json b/mobile/android/geckoview/src/androidTest/assets/web_extensions/browsing-data-built-in/manifest.json
new file mode 100644
index 0000000000..23df4d8338
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/browsing-data-built-in/manifest.json
@@ -0,0 +1,15 @@
+{
+  "manifest_version": 2,
+  "name": "BrowsingData",
+  "browser_specific_settings": {
+    "gecko": {
+      "id": "browsing-data-settings@tests.mozilla.org"
+    }
+  },
+  "version": "1.0",
+  "description": "Tests the browsingData API",
+  "background": {
+    "scripts": ["background.js"]
+  },
+  "permissions": ["browsingData", "geckoViewAddons", "nativeMessaging"]
+}
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/browsing-data/background.js b/mobile/android/geckoview/src/androidTest/assets/web_extensions/browsing-data/background.js
new file mode 100644
index 0000000000..4597e3328b
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/browsing-data/background.js
@@ -0,0 +1,8 @@
+browser.browsingData.removeDownloads({ since: 10001 });
+browser.browsingData.removeFormData({ since: 10002 });
+browser.browsingData.removeHistory({ since: 10003 });
+browser.browsingData.removePasswords({ since: 10004 });
+browser.browsingData.remove(
+  { since: 10005 },
+  { downloads: true, cookies: true }
+);
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/browsing-data/manifest.json b/mobile/android/geckoview/src/androidTest/assets/web_extensions/browsing-data/manifest.json
new file mode 100644
index 0000000000..f7af03c25e
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/browsing-data/manifest.json
@@ -0,0 +1,15 @@
+{
+  "manifest_version": 2,
+  "name": "BrowsingData",
+  "browser_specific_settings": {
+    "gecko": {
+      "id": "browsing-data@tests.mozilla.org"
+    }
+  },
+  "version": "1.0",
+  "description": "Tests the browsingData API",
+  "background": {
+    "scripts": ["background.js"]
+  },
+  "permissions": ["browsingData"]
+}
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/download-flags-false/download.js b/mobile/android/geckoview/src/androidTest/assets/web_extensions/download-flags-false/download.js
new file mode 100644
index 0000000000..68f51ea5d8
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/download-flags-false/download.js
@@ -0,0 +1,3 @@
+browser.downloads.download({
+  url: "http://localhost:4245/assets/www/images/test.gif",
+});
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/download-flags-false/manifest.json b/mobile/android/geckoview/src/androidTest/assets/web_extensions/download-flags-false/manifest.json
new file mode 100644
index 0000000000..77b1cb5179
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/download-flags-false/manifest.json
@@ -0,0 +1,15 @@
+{
+  "manifest_version": 2,
+  "name": "Download",
+  "version": "1.0",
+  "browser_specific_settings": {
+    "gecko": {
+      "id": "download-flags-false@tests.mozilla.org"
+    }
+  },
+  "description": "Downloads a file",
+  "background": {
+    "scripts": ["download.js"]
+  },
+  "permissions": ["downloads"]
+}
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/download-flags-true/download.js b/mobile/android/geckoview/src/androidTest/assets/web_extensions/download-flags-true/download.js
new file mode 100644
index 0000000000..4bb06a5cbb
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/download-flags-true/download.js
@@ -0,0 +1,16 @@
+browser.downloads.download({
+  url: "http://localhost:4245/assets/www/images/test.gif",
+  filename: "banana.gif",
+  method: "POST",
+  body: "postbody",
+  headers: [
+    {
+      name: "User-Agent",
+      value: "Mozilla Firefox",
+    },
+  ],
+  allowHttpErrors: true,
+  conflictAction: "overwrite",
+  saveAs: true,
+  incognito: true,
+});
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/download-flags-true/manifest.json b/mobile/android/geckoview/src/androidTest/assets/web_extensions/download-flags-true/manifest.json
new file mode 100644
index 0000000000..c0170dafd4
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/download-flags-true/manifest.json
@@ -0,0 +1,15 @@
+{
+  "manifest_version": 2,
+  "name": "Download",
+  "version": "1.0",
+  "browser_specific_settings": {
+    "gecko": {
+      "id": "download-flags-true@tests.mozilla.org"
+    }
+  },
+  "description": "Downloads a file",
+  "background": {
+    "scripts": ["download.js"]
+  },
+  "permissions": ["downloads"]
+}
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/download-onChanged/download.js b/mobile/android/geckoview/src/androidTest/assets/web_extensions/download-onChanged/download.js
new file mode 100644
index 0000000000..01cd377cef
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/download-onChanged/download.js
@@ -0,0 +1,18 @@
+async function test() {
+  browser.downloads.onChanged.addListener(async delta => {
+    const changes = { current: {}, previous: {} };
+    changes.id = delta.id;
+    delete delta.id;
+    for (const prop in delta) {
+      changes.current[prop] = delta[prop].current;
+      changes.previous[prop] = delta[prop].previous;
+    }
+    await browser.runtime.sendNativeMessage("browser", changes);
+  });
+
+  await browser.downloads.download({
+    url: "http://localhost:4245/assets/www/images/test.gif",
+  });
+}
+
+test();
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/download-onChanged/manifest.json b/mobile/android/geckoview/src/androidTest/assets/web_extensions/download-onChanged/manifest.json
new file mode 100644
index 0000000000..1c1ad4cc5e
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/download-onChanged/manifest.json
@@ -0,0 +1,15 @@
+{
+  "manifest_version": 2,
+  "name": "Download",
+  "version": "1.0",
+  "browser_specific_settings": {
+    "gecko": {
+      "id": "download-onChanged@tests.mozilla.org"
+    }
+  },
+  "description": "Downloads a file",
+  "background": {
+    "scripts": ["download.js"]
+  },
+  "permissions": ["downloads", "geckoViewAddons", "nativeMessaging"]
+}
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/dummy-incompatible.xpi b/mobile/android/geckoview/src/androidTest/assets/web_extensions/dummy-incompatible.xpi
new file mode 100644
index 0000000000..93c5dbd3b2
Binary files /dev/null and b/mobile/android/geckoview/src/androidTest/assets/web_extensions/dummy-incompatible.xpi differ
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/dummy.xpi b/mobile/android/geckoview/src/androidTest/assets/web_extensions/dummy.xpi
new file mode 100644
index 0000000000..0e0f549ceb
Binary files /dev/null and b/mobile/android/geckoview/src/androidTest/assets/web_extensions/dummy.xpi differ
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/dummy/dummy.js b/mobile/android/geckoview/src/androidTest/assets/web_extensions/dummy/dummy.js
new file mode 100644
index 0000000000..2a49c0d665
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/dummy/dummy.js
@@ -0,0 +1 @@
+console.log("Hi, I'm a dummy.");
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/dummy/manifest.json b/mobile/android/geckoview/src/androidTest/assets/web_extensions/dummy/manifest.json
new file mode 100644
index 0000000000..f1f9b93a91
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/dummy/manifest.json
@@ -0,0 +1,21 @@
+{
+  "manifest_version": 2,
+  "name": "Dummy",
+  "version": "1.0",
+  "browser_specific_settings": {
+    "gecko": {
+      "id": "dummy@tests.mozilla.org"
+    }
+  },
+  "description": "Doesn't do anything.",
+  "options_ui": {
+    "open_in_tab": true,
+    "page": "options.html"
+  },
+  "content_scripts": [
+    {
+      "matches": ["*://*.example.com/*"],
+      "js": ["dummy.js"]
+    }
+  ]
+}
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/extension-page-restore/manifest.json b/mobile/android/geckoview/src/androidTest/assets/web_extensions/extension-page-restore/manifest.json
new file mode 100644
index 0000000000..0fcb48bc8f
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/extension-page-restore/manifest.json
@@ -0,0 +1,11 @@
+{
+  "manifest_version": 2,
+  "name": "Test messages sent from extensions when restoring",
+  "version": "1.0",
+  "browser_specific_settings": {
+    "gecko": {
+      "id": "extension-page-restoring@tests.mozilla.org"
+    }
+  },
+  "permissions": ["geckoViewAddons", "nativeMessaging"]
+}
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/extension-page-restore/tab-script.js b/mobile/android/geckoview/src/androidTest/assets/web_extensions/extension-page-restore/tab-script.js
new file mode 100644
index 0000000000..66866bbd37
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/extension-page-restore/tab-script.js
@@ -0,0 +1,5 @@
+browser.runtime.sendNativeMessage("browser1", "HELLO_FROM_PAGE_1");
+browser.runtime.sendNativeMessage("browser2", "HELLO_FROM_PAGE_2");
+
+const port = browser.runtime.connectNative("browser1");
+port.postMessage("HELLO_FROM_PORT");
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/extension-page-restore/tab.html b/mobile/android/geckoview/src/androidTest/assets/web_extensions/extension-page-restore/tab.html
new file mode 100644
index 0000000000..d99a610c0c
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/extension-page-restore/tab.html
@@ -0,0 +1,10 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8" />
+  </head>
+  <body>
+    <h1>Hello World!</h1>
+    <script src="tab-script.js"></script>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/extension-page-update/background-script.js b/mobile/android/geckoview/src/androidTest/assets/web_extensions/extension-page-update/background-script.js
new file mode 100644
index 0000000000..43e2b44f96
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/extension-page-update/background-script.js
@@ -0,0 +1,7 @@
+browser.runtime.onMessage.addListener(notify);
+
+function notify(message) {
+  if (message.action == "showTab") {
+    browser.tabs.update({ url: "/tab.html" });
+  }
+}
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/extension-page-update/manifest.json b/mobile/android/geckoview/src/androidTest/assets/web_extensions/extension-page-update/manifest.json
new file mode 100644
index 0000000000..c64115e07c
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/extension-page-update/manifest.json
@@ -0,0 +1,21 @@
+{
+  "manifest_version": 2,
+  "name": "Mozilla Android Components - Tabs Update Test",
+  "version": "1.0",
+  "background": {
+    "scripts": ["background-script.js"]
+  },
+  "browser_specific_settings": {
+    "gecko": {
+      "id": "extension-page-update@tests.mozilla.org"
+    }
+  },
+  "content_scripts": [
+    {
+      "matches": ["*://*.example.com/*"],
+      "js": ["tabs.js"],
+      "run_at": "document_idle"
+    }
+  ],
+  "permissions": ["geckoViewAddons", "nativeMessaging", "tabs", "<all_urls>"]
+}
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/extension-page-update/tab-script.js b/mobile/android/geckoview/src/androidTest/assets/web_extensions/extension-page-update/tab-script.js
new file mode 100644
index 0000000000..011f3bb301
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/extension-page-update/tab-script.js
@@ -0,0 +1,2 @@
+// Let's test privileged APIs
+browser.runtime.sendNativeMessage("browser", "HELLO_FROM_PAGE");
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/extension-page-update/tab.html b/mobile/android/geckoview/src/androidTest/assets/web_extensions/extension-page-update/tab.html
new file mode 100644
index 0000000000..d99a610c0c
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/extension-page-update/tab.html
@@ -0,0 +1,10 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8" />
+  </head>
+  <body>
+    <h1>Hello World!</h1>
+    <script src="tab-script.js"></script>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/extension-page-update/tabs.js b/mobile/android/geckoview/src/androidTest/assets/web_extensions/extension-page-update/tabs.js
new file mode 100644
index 0000000000..ef5fbf6ce3
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/extension-page-update/tabs.js
@@ -0,0 +1 @@
+browser.runtime.sendMessage({ action: "showTab" });
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/langpack_signed.xpi b/mobile/android/geckoview/src/androidTest/assets/web_extensions/langpack_signed.xpi
new file mode 100644
index 0000000000..f60d00348e
Binary files /dev/null and b/mobile/android/geckoview/src/androidTest/assets/web_extensions/langpack_signed.xpi differ
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/messaging-content/manifest.json b/mobile/android/geckoview/src/androidTest/assets/web_extensions/messaging-content/manifest.json
new file mode 100644
index 0000000000..9a687dafbe
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/messaging-content/manifest.json
@@ -0,0 +1,22 @@
+{
+  "manifest_version": 2,
+  "name": "messaging",
+  "version": "1.0",
+  "description": "Test messaging between app and web extension",
+  "browser_specific_settings": {
+    "gecko": {
+      "id": "messaging-content@tests.mozilla.org"
+    }
+  },
+  "content_scripts": [
+    {
+      "matches": ["*://*.example.com/*"],
+      "js": ["messaging.js"]
+    }
+  ],
+  "permissions": [
+    "geckoViewAddons",
+    "nativeMessaging",
+    "nativeMessagingFromContent"
+  ]
+}
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/messaging-content/messaging.js b/mobile/android/geckoview/src/androidTest/assets/web_extensions/messaging-content/messaging.js
new file mode 100644
index 0000000000..1c8323df53
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/messaging-content/messaging.js
@@ -0,0 +1,29 @@
+// This message should not be handled
+browser.runtime.sendNativeMessage("badNativeApi", "errorerrorerror");
+
+async function runTest() {
+  const response = await browser.runtime.sendNativeMessage(
+    "browser",
+    "testContentBrowserMessage"
+  );
+
+  browser.runtime.sendNativeMessage("browser", `response: ${response}`);
+
+  const port = browser.runtime.connectNative("browser");
+  port.onMessage.addListener(response => {
+    if (response.action === "disconnect") {
+      port.disconnect();
+      return;
+    }
+
+    port.postMessage(`response: ${response.message}`);
+  });
+
+  port.onDisconnect.addListener(() =>
+    browser.runtime.sendNativeMessage("browser", { type: "portDisconnected" })
+  );
+
+  port.postMessage("testContentPortMessage");
+}
+
+runTest();
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/messaging-iframe/manifest.json b/mobile/android/geckoview/src/androidTest/assets/web_extensions/messaging-iframe/manifest.json
new file mode 100644
index 0000000000..f9039fd2e8
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/messaging-iframe/manifest.json
@@ -0,0 +1,23 @@
+{
+  "manifest_version": 2,
+  "name": "messaging",
+  "version": "1.0",
+  "description": "Test messaging between app and web extension",
+  "browser_specific_settings": {
+    "gecko": {
+      "id": "messaging-iframe@tests.mozilla.org"
+    }
+  },
+  "content_scripts": [
+    {
+      "matches": ["*://localhost/*"],
+      "js": ["messaging.js"],
+      "all_frames": true
+    }
+  ],
+  "permissions": [
+    "geckoViewAddons",
+    "nativeMessaging",
+    "nativeMessagingFromContent"
+  ]
+}
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/messaging-iframe/messaging.js b/mobile/android/geckoview/src/androidTest/assets/web_extensions/messaging-iframe/messaging.js
new file mode 100644
index 0000000000..eb4ad3d8f9
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/messaging-iframe/messaging.js
@@ -0,0 +1,11 @@
+browser.runtime.sendNativeMessage("badNativeApi", "errorerrorerror");
+
+async function runTest() {
+  await browser.runtime.sendNativeMessage(
+    "browser",
+    "testContentBrowserMessage"
+  );
+  browser.runtime.connectNative("browser");
+}
+
+runTest();
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/messaging/background.js b/mobile/android/geckoview/src/androidTest/assets/web_extensions/messaging/background.js
new file mode 100644
index 0000000000..20deb53ae7
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/messaging/background.js
@@ -0,0 +1,28 @@
+browser.runtime.sendNativeMessage("badNativeApi", "errorerrorerror");
+
+async function runTest() {
+  const response = await browser.runtime.sendNativeMessage(
+    "browser",
+    "testBackgroundBrowserMessage"
+  );
+
+  browser.runtime.sendNativeMessage("browser", `response: ${response}`);
+
+  const port = browser.runtime.connectNative("browser");
+  port.onMessage.addListener(response => {
+    if (response.action === "disconnect") {
+      port.disconnect();
+      return;
+    }
+
+    port.postMessage(`response: ${response.message}`);
+  });
+
+  port.onDisconnect.addListener(() =>
+    browser.runtime.sendNativeMessage("browser", { type: "portDisconnected" })
+  );
+
+  port.postMessage("testBackgroundPortMessage");
+}
+
+runTest();
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/messaging/icons/border-48.png b/mobile/android/geckoview/src/androidTest/assets/web_extensions/messaging/icons/border-48.png
new file mode 100644
index 0000000000..90687de26d
Binary files /dev/null and b/mobile/android/geckoview/src/androidTest/assets/web_extensions/messaging/icons/border-48.png differ
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/messaging/manifest.json b/mobile/android/geckoview/src/androidTest/assets/web_extensions/messaging/manifest.json
new file mode 100644
index 0000000000..d25b692f63
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/messaging/manifest.json
@@ -0,0 +1,18 @@
+{
+  "manifest_version": 2,
+  "name": "messaging",
+  "version": "1.0",
+  "description": "Test messaging between app and web extension",
+  "icons": {
+    "48": "icons/border-48.png"
+  },
+  "browser_specific_settings": {
+    "gecko": {
+      "id": "messaging@tests.mozilla.org"
+    }
+  },
+  "background": {
+    "scripts": ["background.js"]
+  },
+  "permissions": ["geckoViewAddons", "nativeMessaging"]
+}
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/notification-test/background.js b/mobile/android/geckoview/src/androidTest/assets/web_extensions/notification-test/background.js
new file mode 100644
index 0000000000..cdd3a7a523
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/notification-test/background.js
@@ -0,0 +1,6 @@
+browser.notifications.create("cake-notification", {
+  type: "basic",
+  title: "Time for cake!",
+  iconUrl: "https://example.com/img.svg",
+  message: "Something something cake",
+});
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/notification-test/manifest.json b/mobile/android/geckoview/src/androidTest/assets/web_extensions/notification-test/manifest.json
new file mode 100644
index 0000000000..963fb51e3f
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/notification-test/manifest.json
@@ -0,0 +1,15 @@
+{
+  "manifest_version": 2,
+  "name": "Notification test",
+  "version": "1.0",
+  "description": "Send a notification.",
+  "browser_specific_settings": {
+    "gecko": {
+      "id": "notification@example.com"
+    }
+  },
+  "background": {
+    "scripts": ["background.js"]
+  },
+  "permissions": ["notifications"]
+}
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/openoptionspage-1/background.js b/mobile/android/geckoview/src/androidTest/assets/web_extensions/openoptionspage-1/background.js
new file mode 100644
index 0000000000..1872c48d00
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/openoptionspage-1/background.js
@@ -0,0 +1 @@
+browser.runtime.openOptionsPage();
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/openoptionspage-1/manifest.json b/mobile/android/geckoview/src/androidTest/assets/web_extensions/openoptionspage-1/manifest.json
new file mode 100644
index 0000000000..487fb0fb3d
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/openoptionspage-1/manifest.json
@@ -0,0 +1,20 @@
+{
+  "manifest_version": 2,
+  "name": "openOptionsPage-1",
+  "version": "1.0",
+  "description": "Opens options page in a new tab.",
+  "browser_specific_settings": {
+    "gecko": {
+      "id": "openoptionspage1@tests.mozilla.org"
+    }
+  },
+  "background": {
+    "scripts": ["background.js"]
+  },
+  "permissions": ["tabs"],
+  "options_ui": {
+    "page": "options.html",
+    "browser_style": true,
+    "open_in_tab": true
+  }
+}
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/openoptionspage-2/background.js b/mobile/android/geckoview/src/androidTest/assets/web_extensions/openoptionspage-2/background.js
new file mode 100644
index 0000000000..1872c48d00
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/openoptionspage-2/background.js
@@ -0,0 +1 @@
+browser.runtime.openOptionsPage();
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/openoptionspage-2/manifest.json b/mobile/android/geckoview/src/androidTest/assets/web_extensions/openoptionspage-2/manifest.json
new file mode 100644
index 0000000000..3378050197
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/openoptionspage-2/manifest.json
@@ -0,0 +1,20 @@
+{
+  "manifest_version": 2,
+  "name": "openOptionsPage-2",
+  "version": "1.0",
+  "description": "Opens options page via delegate.",
+  "browser_specific_settings": {
+    "gecko": {
+      "id": "openoptionspage2@tests.mozilla.org"
+    }
+  },
+  "background": {
+    "scripts": ["background.js"]
+  },
+  "permissions": ["tabs"],
+  "options_ui": {
+    "page": "options.html",
+    "browser_style": true,
+    "open_in_tab": false
+  }
+}
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/page-history/manifest.json b/mobile/android/geckoview/src/androidTest/assets/web_extensions/page-history/manifest.json
new file mode 100644
index 0000000000..9d411c8dd6
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/page-history/manifest.json
@@ -0,0 +1,11 @@
+{
+  "manifest_version": 2,
+  "name": "Page History",
+  "version": "1.0",
+  "browser_specific_settings": {
+    "gecko": {
+      "id": "page-history@tests.mozilla.org"
+    }
+  },
+  "description": "Can load a WebExtension Page."
+}
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/page-history/page.html b/mobile/android/geckoview/src/androidTest/assets/web_extensions/page-history/page.html
new file mode 100644
index 0000000000..b16a98f74b
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/page-history/page.html
@@ -0,0 +1,9 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8" />
+  </head>
+  <body>
+    <h1>Hello, World!</h1>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/permission-request/clickToRequestPermission.html b/mobile/android/geckoview/src/androidTest/assets/web_extensions/permission-request/clickToRequestPermission.html
new file mode 100644
index 0000000000..e6ddcb8c8d
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/permission-request/clickToRequestPermission.html
@@ -0,0 +1,11 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <title>Hello, world!</title>
+    <meta name="viewport" content="initial-scale=1.0" />
+    <script type="text/javascript" src="request-permission.js"></script>
+  </head>
+  <body style="height: 100%">
+    <p>Hello, world!</p>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/permission-request/manifest.json b/mobile/android/geckoview/src/androidTest/assets/web_extensions/permission-request/manifest.json
new file mode 100644
index 0000000000..d2cd405cd1
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/permission-request/manifest.json
@@ -0,0 +1,13 @@
+{
+  "manifest_version": 2,
+  "name": "permissions",
+  "browser_specific_settings": {
+    "gecko": {
+      "id": "permissions@example.com"
+    }
+  },
+  "version": "1.0",
+  "description": "Request optional extension permissions.",
+  "permissions": ["nativeMessaging", "geckoViewAddons"],
+  "optional_permissions": ["geolocation", "*://example.com/*"]
+}
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/permission-request/request-permission.js b/mobile/android/geckoview/src/androidTest/assets/web_extensions/permission-request/request-permission.js
new file mode 100644
index 0000000000..d50bff4126
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/permission-request/request-permission.js
@@ -0,0 +1,11 @@
+window.onload = () => {
+  document.body.addEventListener("click", requestPermissions);
+  async function requestPermissions() {
+    const perms = {
+      permissions: ["geolocation"],
+      origins: ["*://example.com/*"],
+    };
+    const response = await browser.permissions.request(perms);
+    browser.runtime.sendNativeMessage("browser", `${response}`);
+  }
+};
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/redirect-to-android-resource/background.js b/mobile/android/geckoview/src/androidTest/assets/web_extensions/redirect-to-android-resource/background.js
new file mode 100644
index 0000000000..fdf088a505
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/redirect-to-android-resource/background.js
@@ -0,0 +1,39 @@
+"use strict";
+
+function setupRedirect(fromUrl, redirectUrl) {
+  browser.webRequest.onBeforeRequest.addListener(
+    details => {
+      console.log(`Extension redirects from ${fromUrl} to ${redirectUrl}`);
+      return { redirectUrl };
+    },
+    { urls: [fromUrl] },
+    ["blocking"]
+  );
+}
+
+// Intercepts all script requests from androidTest/assets/www/trackers.html.
+// Scripts are executed in order of appearance in the page and block the
+// page's "load" event, so the test runner can just wait for the page to
+// have loaded and then check the page content to verify that the requests
+// were intercepted as expected.
+setupRedirect(
+  "http://trackertest.org/tracker.js",
+  "data:text/javascript,document.body.textContent='start'"
+);
+setupRedirect(
+  "https://tracking.example.com/tracker.js",
+  browser.runtime.getURL("web-accessible-script.js")
+);
+setupRedirect(
+  "https://itisatracker.org/tracker.js",
+  `data:text/javascript,document.body.textContent+=',end'`
+);
+
+// Work around bug 1300234 to ensure that the webRequest listener has been
+// registered before we resume the test. API result doesn't matter, we just
+// want to make a roundtrip.
+var listenerReady = browser.webRequest.getSecurityInfo("").catch(() => {});
+
+listenerReady.then(() => {
+  browser.runtime.sendNativeMessage("browser", "setupReadyStartTest");
+});
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/redirect-to-android-resource/manifest.json b/mobile/android/geckoview/src/androidTest/assets/web_extensions/redirect-to-android-resource/manifest.json
new file mode 100644
index 0000000000..71d811faa3
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/redirect-to-android-resource/manifest.json
@@ -0,0 +1,25 @@
+{
+  "name": "redirect-to-android-resource",
+  "description": "Redirects script requests from trackers.html to moz-extension:-resource packaged in the APK (resource://android/...)",
+  "manifest_version": 2,
+  "version": "1",
+  "browser_specific_settings": {
+    "gecko": {
+      "id": "redirect-to-android-resource@tests.mozilla.org"
+    }
+  },
+  "background": {
+    "scripts": ["background.js"]
+  },
+  "permissions": [
+    "geckoViewAddons",
+    "nativeMessaging",
+    "webRequest",
+    "webRequestBlocking",
+    "http://localhost/",
+    "http://trackertest.org/",
+    "https://tracking.example.com/",
+    "https://itisatracker.org/tracker.js"
+  ],
+  "web_accessible_resources": ["web-accessible-script.js"]
+}
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/redirect-to-android-resource/web-accessible-script.js b/mobile/android/geckoview/src/androidTest/assets/web_extensions/redirect-to-android-resource/web-accessible-script.js
new file mode 100644
index 0000000000..a26c4cc91c
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/redirect-to-android-resource/web-accessible-script.js
@@ -0,0 +1,3 @@
+"use strict";
+
+document.body.textContent += ",extension-was-here";
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-activate-remove-2/background.js b/mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-activate-remove-2/background.js
new file mode 100644
index 0000000000..f8ecef0215
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-activate-remove-2/background.js
@@ -0,0 +1,16 @@
+browser.tabs.onActivated.addListener(async tabChange => {
+  const activeTabs = await browser.tabs.query({ active: true });
+  const currentWindow = await browser.tabs.query({
+    currentWindow: true,
+    active: true,
+  });
+
+  if (
+    activeTabs.length === 1 &&
+    activeTabs[0].id == tabChange.tabId &&
+    currentWindow.length === 1 &&
+    currentWindow[0].id === tabChange.tabId
+  ) {
+    browser.tabs.remove(tabChange.tabId);
+  }
+});
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-activate-remove-2/manifest.json b/mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-activate-remove-2/manifest.json
new file mode 100644
index 0000000000..784215634d
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-activate-remove-2/manifest.json
@@ -0,0 +1,15 @@
+{
+  "browser_specific_settings": {
+    "gecko": {
+      "id": "set-tab-active-2@tests.mozilla.org"
+    }
+  },
+  "manifest_version": 2,
+  "name": "messaging",
+  "version": "1.0",
+  "description": "Removes the activated Tab.",
+  "background": {
+    "scripts": ["background.js"]
+  },
+  "permissions": ["tabs"]
+}
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-activate-remove/background.js b/mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-activate-remove/background.js
new file mode 100644
index 0000000000..f8ecef0215
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-activate-remove/background.js
@@ -0,0 +1,16 @@
+browser.tabs.onActivated.addListener(async tabChange => {
+  const activeTabs = await browser.tabs.query({ active: true });
+  const currentWindow = await browser.tabs.query({
+    currentWindow: true,
+    active: true,
+  });
+
+  if (
+    activeTabs.length === 1 &&
+    activeTabs[0].id == tabChange.tabId &&
+    currentWindow.length === 1 &&
+    currentWindow[0].id === tabChange.tabId
+  ) {
+    browser.tabs.remove(tabChange.tabId);
+  }
+});
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-activate-remove/manifest.json b/mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-activate-remove/manifest.json
new file mode 100644
index 0000000000..03c3514bb0
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-activate-remove/manifest.json
@@ -0,0 +1,15 @@
+{
+  "browser_specific_settings": {
+    "gecko": {
+      "id": "set-tab-active@tests.mozilla.org"
+    }
+  },
+  "manifest_version": 2,
+  "name": "messaging",
+  "version": "1.0",
+  "description": "Removes the activated Tab.",
+  "background": {
+    "scripts": ["background.js"]
+  },
+  "permissions": ["tabs"]
+}
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-create-2/background.js b/mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-create-2/background.js
new file mode 100644
index 0000000000..8182b6a4f8
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-create-2/background.js
@@ -0,0 +1,4 @@
+browser.tabs.create({
+  url: "https://www.mozilla.org/en-US/",
+  cookieStoreId: "firefox-container-1",
+});
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-create-2/manifest.json b/mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-create-2/manifest.json
new file mode 100644
index 0000000000..2746155adf
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-create-2/manifest.json
@@ -0,0 +1,15 @@
+{
+  "manifest_version": 2,
+  "name": "messaging",
+  "version": "1.0",
+  "description": "Creates a tab with a contextual identity.",
+  "browser_specific_settings": {
+    "gecko": {
+      "id": "tabs-create-2@tests.mozilla.org"
+    }
+  },
+  "background": {
+    "scripts": ["background.js"]
+  },
+  "permissions": ["tabs", "cookies"]
+}
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-create-remove/background.js b/mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-create-remove/background.js
new file mode 100644
index 0000000000..a1f55a3a4f
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-create-remove/background.js
@@ -0,0 +1,3 @@
+browser.tabs.create({}).then(tab => {
+  browser.tabs.remove(tab.id);
+});
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-create-remove/manifest.json b/mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-create-remove/manifest.json
new file mode 100644
index 0000000000..10b2f454e7
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-create-remove/manifest.json
@@ -0,0 +1,15 @@
+{
+  "manifest_version": 2,
+  "name": "messaging",
+  "version": "1.0",
+  "description": "Creates and removes a tab.",
+  "browser_specific_settings": {
+    "gecko": {
+      "id": "tabs-create-remove@tests.mozilla.org"
+    }
+  },
+  "background": {
+    "scripts": ["background.js"]
+  },
+  "permissions": []
+}
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-create/background.js b/mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-create/background.js
new file mode 100644
index 0000000000..6fbd381e61
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-create/background.js
@@ -0,0 +1 @@
+browser.tabs.create({ url: "https://www.mozilla.org/en-US/" });
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-create/manifest.json b/mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-create/manifest.json
new file mode 100644
index 0000000000..517ddd0189
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-create/manifest.json
@@ -0,0 +1,15 @@
+{
+  "manifest_version": 2,
+  "name": "messaging",
+  "version": "1.0",
+  "description": "Creates a tab.",
+  "browser_specific_settings": {
+    "gecko": {
+      "id": "tabs-create@tests.mozilla.org"
+    }
+  },
+  "background": {
+    "scripts": ["background.js"]
+  },
+  "permissions": ["tabs"]
+}
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-remove/background.js b/mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-remove/background.js
new file mode 100644
index 0000000000..c6ec7aee33
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-remove/background.js
@@ -0,0 +1,3 @@
+browser.tabs.query({ url: "*://*/*?tabToClose" }).then(([tab]) => {
+  browser.tabs.remove(tab.id);
+});
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-remove/manifest.json b/mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-remove/manifest.json
new file mode 100644
index 0000000000..559512eec5
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/tabs-remove/manifest.json
@@ -0,0 +1,15 @@
+{
+  "manifest_version": 2,
+  "name": "messaging",
+  "version": "1.0",
+  "description": "Removes an existing tab.",
+  "browser_specific_settings": {
+    "gecko": {
+      "id": "tabs-remove@tests.mozilla.org"
+    }
+  },
+  "background": {
+    "scripts": ["background.js"]
+  },
+  "permissions": ["tabs"]
+}
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/test-support/TestSupportChild.sys.mjs b/mobile/android/geckoview/src/androidTest/assets/web_extensions/test-support/TestSupportChild.sys.mjs
new file mode 100644
index 0000000000..6dd3e8eed4
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/test-support/TestSupportChild.sys.mjs
@@ -0,0 +1,83 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import { GeckoViewActorChild } from "resource://gre/modules/GeckoViewActorChild.sys.mjs";
+
+export class TestSupportChild extends GeckoViewActorChild {
+  receiveMessage(aMsg) {
+    debug`receiveMessage: ${aMsg.name}`;
+
+    switch (aMsg.name) {
+      case "FlushApzRepaints":
+        return new Promise(resolve => {
+          const repaintDone = () => {
+            debug`APZ flush done`;
+            Services.obs.removeObserver(repaintDone, "apz-repaints-flushed");
+            resolve();
+          };
+          Services.obs.addObserver(repaintDone, "apz-repaints-flushed");
+          if (this.contentWindow.windowUtils.flushApzRepaints()) {
+            debug`Flushed APZ repaints, waiting for callback...`;
+          } else {
+            debug`Flushing APZ repaints was a no-op, triggering callback directly...`;
+            repaintDone();
+          }
+        });
+      case "PromiseAllPaintsDone":
+        return new Promise(resolve => {
+          const window = this.contentWindow;
+          const utils = window.windowUtils;
+
+          function waitForPaints() {
+            // Wait until paint suppression has ended
+            if (utils.paintingSuppressed) {
+              dump`waiting for paint suppression to end...`;
+              window.setTimeout(waitForPaints, 0);
+              return;
+            }
+
+            if (utils.isMozAfterPaintPending) {
+              dump`waiting for paint...`;
+              window.addEventListener("MozAfterPaint", waitForPaints, {
+                once: true,
+              });
+              return;
+            }
+            resolve();
+          }
+          waitForPaints();
+        });
+      case "GetLinkColor": {
+        const { selector } = aMsg.data;
+        const element = this.document.querySelector(selector);
+        if (!element) {
+          throw new Error("No element for " + selector);
+        }
+        const color =
+          this.contentWindow.windowUtils.getVisitedDependentComputedStyle(
+            element,
+            "",
+            "color"
+          );
+        return color;
+      }
+      case "SetResolutionAndScaleTo": {
+        return new Promise(resolve => {
+          const window = this.contentWindow;
+          const { resolution } = aMsg.data;
+          window.visualViewport.addEventListener("resize", () => resolve(), {
+            once: true,
+          });
+          window.windowUtils.setResolutionAndScaleTo(resolution);
+        });
+      }
+      case "WaitForContentTransformsReceived": {
+        return this.contentWindow.docShell.browserChild.contentTransformsReceived();
+      }
+    }
+    return null;
+  }
+}
+
+const { debug } = TestSupportChild.initLogging("GeckoViewTestSupport");
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/test-support/TestSupportProcessChild.sys.mjs b/mobile/android/geckoview/src/androidTest/assets/web_extensions/test-support/TestSupportProcessChild.sys.mjs
new file mode 100644
index 0000000000..0684ef0967
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/test-support/TestSupportProcessChild.sys.mjs
@@ -0,0 +1,22 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import { GeckoViewUtils } from "resource://gre/modules/GeckoViewUtils.sys.mjs";
+
+const ProcessTools = Cc["@mozilla.org/processtools-service;1"].getService(
+  Ci.nsIProcessToolsService
+);
+
+export class TestSupportProcessChild extends JSProcessActorChild {
+  receiveMessage(aMsg) {
+    debug`receiveMessage: ${aMsg.name}`;
+
+    switch (aMsg.name) {
+      case "KillContentProcess":
+        ProcessTools.kill(Services.appinfo.processID);
+    }
+  }
+}
+
+const { debug } = GeckoViewUtils.initLogging("TestSupportProcess[C]");
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/test-support/background.js b/mobile/android/geckoview/src/androidTest/assets/web_extensions/test-support/background.js
new file mode 100644
index 0000000000..181764859a
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/test-support/background.js
@@ -0,0 +1,127 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+const port = browser.runtime.connectNative("browser");
+
+const APIS = {
+  AddHistogram({ id, value }) {
+    browser.test.addHistogram(id, value);
+  },
+  Eval({ code }) {
+    // eslint-disable-next-line no-eval
+    return eval(`(async () => {
+      ${code}
+    })()`);
+  },
+  SetScalar({ id, value }) {
+    browser.test.setScalar(id, value);
+  },
+  GetRequestedLocales() {
+    return browser.test.getRequestedLocales();
+  },
+  GetLinkColor({ tab, selector }) {
+    return browser.test.getLinkColor(tab.id, selector);
+  },
+  GetPidForTab({ tab }) {
+    return browser.test.getPidForTab(tab.id);
+  },
+  WaitForContentTransformsReceived({ tab }) {
+    return browser.test.waitForContentTransformsReceived(tab.id);
+  },
+  GetProfilePath() {
+    return browser.test.getProfilePath();
+  },
+  GetAllBrowserPids() {
+    return browser.test.getAllBrowserPids();
+  },
+  KillContentProcess({ pid }) {
+    return browser.test.killContentProcess(pid);
+  },
+  GetPrefs({ prefs }) {
+    return browser.test.getPrefs(prefs);
+  },
+  GetActive({ tab }) {
+    return browser.test.getActive(tab.id);
+  },
+  RemoveAllCertOverrides() {
+    browser.test.removeAllCertOverrides();
+  },
+  RestorePrefs({ oldPrefs }) {
+    return browser.test.restorePrefs(oldPrefs);
+  },
+  SetPrefs({ oldPrefs, newPrefs }) {
+    return browser.test.setPrefs(oldPrefs, newPrefs);
+  },
+  SetResolutionAndScaleTo({ tab, resolution }) {
+    return browser.test.setResolutionAndScaleTo(tab.id, resolution);
+  },
+  FlushApzRepaints({ tab }) {
+    return browser.test.flushApzRepaints(tab.id);
+  },
+  PromiseAllPaintsDone({ tab }) {
+    return browser.test.promiseAllPaintsDone(tab.id);
+  },
+  UsingGpuProcess() {
+    return browser.test.usingGpuProcess();
+  },
+  KillGpuProcess() {
+    return browser.test.killGpuProcess();
+  },
+  CrashGpuProcess() {
+    return browser.test.crashGpuProcess();
+  },
+  ClearHSTSState() {
+    return browser.test.clearHSTSState();
+  },
+  TriggerCookieBannerDetected({ tab }) {
+    return browser.test.triggerCookieBannerDetected(tab.id);
+  },
+  TriggerCookieBannerHandled({ tab }) {
+    return browser.test.triggerCookieBannerHandled(tab.id);
+  },
+  TriggerTranslationsOffer({ tab }) {
+    return browser.test.triggerTranslationsOffer(tab.id);
+  },
+  TriggerLanguageStateChange({ tab, languageState }) {
+    return browser.test.triggerLanguageStateChange(tab.id, languageState);
+  },
+};
+
+port.onMessage.addListener(async message => {
+  const impl = APIS[message.type];
+  apiCall(message, impl);
+});
+
+browser.runtime.onConnect.addListener(contentPort => {
+  contentPort.onMessage.addListener(message => {
+    message.args.tab = contentPort.sender.tab;
+
+    const impl = APIS[message.type];
+    apiCall(message, impl);
+  });
+});
+
+function apiCall(message, impl) {
+  const { id, args } = message;
+  try {
+    sendResponse(id, impl(args));
+  } catch (error) {
+    sendResponse(id, Promise.reject(error));
+  }
+}
+
+function sendResponse(id, response) {
+  Promise.resolve(response).then(
+    value => sendSyncResponse(id, value),
+    reason => sendSyncResponse(id, null, reason)
+  );
+}
+
+function sendSyncResponse(id, response, exception) {
+  port.postMessage({
+    id,
+    response: JSON.stringify(response),
+    exception: exception && exception.toString(),
+  });
+}
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/test-support/manifest.json b/mobile/android/geckoview/src/androidTest/assets/web_extensions/test-support/manifest.json
new file mode 100644
index 0000000000..fea5add0de
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/test-support/manifest.json
@@ -0,0 +1,42 @@
+{
+  "manifest_version": 2,
+  "name": "Test support",
+  "version": "1.0",
+  "description": "Helper script for GeckoView tests",
+  "browser_specific_settings": {
+    "gecko": {
+      "id": "test-support@tests.mozilla.org"
+    }
+  },
+  "content_scripts": [
+    {
+      "matches": ["<all_urls>"],
+      "match_about_blank": true,
+      "js": ["test-support.js"],
+      "run_at": "document_start"
+    }
+  ],
+  "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self';",
+  "background": {
+    "scripts": ["background.js"]
+  },
+  "experiment_apis": {
+    "test": {
+      "schema": "test-schema.json",
+      "parent": {
+        "scopes": ["addon_parent"],
+        "script": "test-api.js",
+        "events": ["startup"],
+        "paths": [["test"]]
+      }
+    }
+  },
+  "options_ui": {
+    "page": "dummy.html"
+  },
+  "permissions": [
+    "geckoViewAddons",
+    "nativeMessaging",
+    "nativeMessagingFromContent"
+  ]
+}
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/test-support/test-api.js b/mobile/android/geckoview/src/androidTest/assets/web_extensions/test-support/test-api.js
new file mode 100644
index 0000000000..1868d25c84
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/test-support/test-api.js
@@ -0,0 +1,256 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+/* globals Services */
+
+const { E10SUtils } = ChromeUtils.importESModule(
+  "resource://gre/modules/E10SUtils.sys.mjs"
+);
+const { Preferences } = ChromeUtils.importESModule(
+  "resource://gre/modules/Preferences.sys.mjs"
+);
+
+// eslint-disable-next-line mozilla/reject-importGlobalProperties
+Cu.importGlobalProperties(["PathUtils"]);
+
+this.test = class extends ExtensionAPI {
+  onStartup() {
+    ChromeUtils.registerWindowActor("TestSupport", {
+      child: {
+        esModuleURI:
+          "resource://android/assets/web_extensions/test-support/TestSupportChild.sys.mjs",
+      },
+      allFrames: true,
+    });
+    ChromeUtils.registerProcessActor("TestSupportProcess", {
+      child: {
+        esModuleURI:
+          "resource://android/assets/web_extensions/test-support/TestSupportProcessChild.sys.mjs",
+      },
+    });
+  }
+
+  onShutdown(isAppShutdown) {
+    if (isAppShutdown) {
+      return;
+    }
+    ChromeUtils.unregisterWindowActor("TestSupport");
+    ChromeUtils.unregisterProcessActor("TestSupportProcess");
+  }
+
+  getAPI(context) {
+    /**
+     * Helper function for getting window or process actors.
+     *
+     * @param tabId - id of the tab; required
+     * @param actorName - a string; the name of the actor
+     *   Default: "TestSupport" which is our test framework actor
+     *   (you can still pass the second parameter when getting the TestSupport actor, for readability)
+     *
+     * @returns actor
+     */
+    function getActorForTab(tabId, actorName = "TestSupport") {
+      const tab = context.extension.tabManager.get(tabId);
+      const { browsingContext } = tab.browser;
+      return browsingContext.currentWindowGlobal.getActor(actorName);
+    }
+
+    return {
+      test: {
+        /* Set prefs and returns set of saved prefs */
+        async setPrefs(oldPrefs, newPrefs) {
+          // Save old prefs
+          Object.assign(
+            oldPrefs,
+            ...Object.keys(newPrefs)
+              .filter(key => !(key in oldPrefs))
+              .map(key => ({ [key]: Preferences.get(key, null) }))
+          );
+
+          // Set new prefs
+          Preferences.set(newPrefs);
+          return oldPrefs;
+        },
+
+        /* Restore prefs to old value. */
+        async restorePrefs(oldPrefs) {
+          for (const [name, value] of Object.entries(oldPrefs)) {
+            if (value === null) {
+              Preferences.reset(name);
+            } else {
+              Preferences.set(name, value);
+            }
+          }
+        },
+
+        /* Get pref values. */
+        async getPrefs(prefs) {
+          return Preferences.get(prefs);
+        },
+
+        /* Gets link color for a given selector. */
+        async getLinkColor(tabId, selector) {
+          return getActorForTab(tabId, "TestSupport").sendQuery(
+            "GetLinkColor",
+            { selector }
+          );
+        },
+
+        async getRequestedLocales() {
+          return Services.locale.requestedLocales;
+        },
+
+        async getPidForTab(tabId) {
+          const tab = context.extension.tabManager.get(tabId);
+          const pids = E10SUtils.getBrowserPids(tab.browser);
+          return pids[0];
+        },
+
+        async waitForContentTransformsReceived(tabId) {
+          return getActorForTab(tabId).sendQuery(
+            "WaitForContentTransformsReceived"
+          );
+        },
+
+        async getAllBrowserPids() {
+          const pids = [];
+          const processes = ChromeUtils.getAllDOMProcesses();
+          for (const process of processes) {
+            if (process.remoteType && process.remoteType.startsWith("web")) {
+              pids.push(process.osPid);
+            }
+          }
+          return pids;
+        },
+
+        async killContentProcess(pid) {
+          const procs = ChromeUtils.getAllDOMProcesses();
+          for (const proc of procs) {
+            if (pid === proc.osPid) {
+              proc
+                .getActor("TestSupportProcess")
+                .sendAsyncMessage("KillContentProcess");
+            }
+          }
+        },
+
+        async addHistogram(id, value) {
+          return Services.telemetry.getHistogramById(id).add(value);
+        },
+
+        removeAllCertOverrides() {
+          const overrideService = Cc[
+            "@mozilla.org/security/certoverride;1"
+          ].getService(Ci.nsICertOverrideService);
+          overrideService.clearAllOverrides();
+        },
+
+        async setScalar(id, value) {
+          return Services.telemetry.scalarSet(id, value);
+        },
+
+        async setResolutionAndScaleTo(tabId, resolution) {
+          return getActorForTab(tabId, "TestSupport").sendQuery(
+            "SetResolutionAndScaleTo",
+            {
+              resolution,
+            }
+          );
+        },
+
+        async getActive(tabId) {
+          const tab = context.extension.tabManager.get(tabId);
+          return tab.browser.docShellIsActive;
+        },
+
+        async getProfilePath() {
+          return PathUtils.profileDir;
+        },
+
+        async flushApzRepaints(tabId) {
+          // TODO: Note that `waitUntilApzStable` in apz_test_utils.js does
+          // flush APZ repaints in the parent process (i.e. calling
+          // nsIDOMWindowUtils.flushApzRepaints for the parent process) before
+          // flushApzRepaints is called for the target content document, if we
+          // still meet intermittent failures, we might want to do it here as
+          // well.
+          await getActorForTab(tabId, "TestSupport").sendQuery(
+            "FlushApzRepaints"
+          );
+        },
+
+        async promiseAllPaintsDone(tabId) {
+          await getActorForTab(tabId, "TestSupport").sendQuery(
+            "PromiseAllPaintsDone"
+          );
+        },
+
+        async usingGpuProcess() {
+          const gfxInfo = Cc["@mozilla.org/gfx/info;1"].getService(
+            Ci.nsIGfxInfo
+          );
+          return gfxInfo.usingGPUProcess;
+        },
+
+        async killGpuProcess() {
+          const gfxInfo = Cc["@mozilla.org/gfx/info;1"].getService(
+            Ci.nsIGfxInfo
+          );
+          return gfxInfo.killGPUProcessForTests();
+        },
+
+        async crashGpuProcess() {
+          const gfxInfo = Cc["@mozilla.org/gfx/info;1"].getService(
+            Ci.nsIGfxInfo
+          );
+          return gfxInfo.crashGPUProcessForTests();
+        },
+
+        async clearHSTSState() {
+          const sss = Cc["@mozilla.org/ssservice;1"].getService(
+            Ci.nsISiteSecurityService
+          );
+          return sss.clearAll();
+        },
+
+        async triggerCookieBannerDetected(tabId) {
+          const actor = getActorForTab(tabId, "CookieBanner");
+          return actor.receiveMessage({
+            name: "CookieBanner::DetectedBanner",
+          });
+        },
+
+        async triggerCookieBannerHandled(tabId) {
+          const actor = getActorForTab(tabId, "CookieBanner");
+          return actor.receiveMessage({
+            name: "CookieBanner::HandledBanner",
+          });
+        },
+
+        async triggerTranslationsOffer(tabId) {
+          const browser = context.extension.tabManager.get(tabId).browser;
+          const { CustomEvent } = browser.ownerGlobal;
+          return browser.dispatchEvent(
+            new CustomEvent("TranslationsParent:OfferTranslation", {
+              bubbles: true,
+            })
+          );
+        },
+
+        async triggerLanguageStateChange(tabId, languageState) {
+          const browser = context.extension.tabManager.get(tabId).browser;
+          const { CustomEvent } = browser.ownerGlobal;
+          return browser.dispatchEvent(
+            new CustomEvent("TranslationsParent:LanguageState", {
+              bubbles: true,
+              detail: languageState,
+            })
+          );
+        },
+      },
+    };
+  }
+};
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/test-support/test-schema.json b/mobile/android/geckoview/src/androidTest/assets/web_extensions/test-support/test-schema.json
new file mode 100644
index 0000000000..94e4b3bd9b
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/test-support/test-schema.json
@@ -0,0 +1,308 @@
+[
+  {
+    "namespace": "test",
+    "description": "Additional APIs for test support in GeckoView.",
+    "functions": [
+      {
+        "name": "setPrefs",
+        "type": "function",
+        "async": true,
+        "description": "Set prefs and return a set of saved prefs",
+        "parameters": [
+          {
+            "name": "oldPrefs",
+            "type": "object",
+            "properties": {},
+            "additionalProperties": { "type": "any" }
+          },
+          {
+            "name": "newPrefs",
+            "type": "object",
+            "properties": {},
+            "additionalProperties": { "type": "any" }
+          }
+        ]
+      },
+      {
+        "name": "restorePrefs",
+        "type": "function",
+        "async": true,
+        "description": "Restore prefs to old value",
+        "parameters": [
+          {
+            "type": "any",
+            "name": "oldPrefs"
+          }
+        ]
+      },
+      {
+        "name": "getPrefs",
+        "type": "function",
+        "async": true,
+        "description": "Get pref values.",
+        "parameters": [
+          {
+            "name": "prefs",
+            "type": "array",
+            "items": {
+              "type": "string"
+            }
+          }
+        ]
+      },
+      {
+        "name": "getLinkColor",
+        "type": "function",
+        "async": true,
+        "description": "Get resolved color for the link resolved by a given selector.",
+        "parameters": [
+          {
+            "type": "number",
+            "name": "tabId"
+          },
+          {
+            "type": "string",
+            "name": "selector"
+          }
+        ]
+      },
+      {
+        "name": "getRequestedLocales",
+        "type": "function",
+        "async": true,
+        "description": "Gets the requested locales.",
+        "parameters": []
+      },
+      {
+        "name": "addHistogram",
+        "type": "function",
+        "async": true,
+        "description": "Add a sample with the given value to the histogram with the given id.",
+        "parameters": [
+          {
+            "type": "string",
+            "name": "id"
+          },
+          {
+            "type": "any",
+            "name": "value"
+          }
+        ]
+      },
+      {
+        "name": "removeAllCertOverrides",
+        "type": "function",
+        "async": true,
+        "description": "Revokes SSL certificate overrides.",
+        "parameters": []
+      },
+      {
+        "name": "setScalar",
+        "type": "function",
+        "async": true,
+        "description": "Set the given value to the scalar with the given id.",
+        "parameters": [
+          {
+            "type": "string",
+            "name": "id"
+          },
+          {
+            "type": "any",
+            "name": "value"
+          }
+        ]
+      },
+      {
+        "name": "setResolutionAndScaleTo",
+        "type": "function",
+        "async": true,
+        "description": "Invokes nsIDOMWindowUtils.setResolutionAndScaleTo.",
+        "parameters": [
+          {
+            "type": "number",
+            "name": "tabId"
+          },
+          {
+            "type": "number",
+            "name": "resolution"
+          }
+        ]
+      },
+      {
+        "name": "getActive",
+        "type": "function",
+        "async": true,
+        "description": "Returns true if the docShell is active for given tab.",
+        "parameters": [
+          {
+            "type": "number",
+            "name": "tabId"
+          }
+        ]
+      },
+      {
+        "name": "getPidForTab",
+        "type": "function",
+        "async": true,
+        "description": "Gets the top-level pid belonging to tabId.",
+        "parameters": [
+          {
+            "type": "number",
+            "name": "tabId"
+          }
+        ]
+      },
+      {
+        "name": "waitForContentTransformsReceived",
+        "type": "function",
+        "async": true,
+        "description": "If we want to test screen coordinates, we need to wait for the updated data which is what this function allows us to do",
+        "parameters": [
+          {
+            "type": "number",
+            "name": "tabId"
+          }
+        ]
+      },
+      {
+        "name": "getAllBrowserPids",
+        "type": "function",
+        "async": true,
+        "description": "Gets the list of pids of the running browser processes",
+        "parameters": []
+      },
+      {
+        "name": "getProfilePath",
+        "type": "function",
+        "async": true,
+        "description": "Gets the path of the current profile",
+        "parameters": []
+      },
+      {
+        "name": "killContentProcess",
+        "type": "function",
+        "async": true,
+        "description": "Crash all content processes",
+        "parameters": [
+          {
+            "type": "number",
+            "name": "pid"
+          }
+        ]
+      },
+      {
+        "name": "flushApzRepaints",
+        "type": "function",
+        "async": true,
+        "description": "Invokes nsIDOMWindowUtils.flushApzRepaints for the document of the tabId.",
+        "parameters": [
+          {
+            "type": "number",
+            "name": "tabId"
+          }
+        ]
+      },
+      {
+        "name": "promiseAllPaintsDone",
+        "type": "function",
+        "async": true,
+        "description": "A simplified version of promiseAllPaintsDone in paint_listeners.js.",
+        "parameters": [
+          {
+            "type": "number",
+            "name": "tabId"
+          }
+        ]
+      },
+      {
+        "name": "usingGpuProcess",
+        "type": "function",
+        "async": true,
+        "description": "Returns true if Gecko is using a GPU process.",
+        "parameters": []
+      },
+
+      {
+        "name": "killGpuProcess",
+        "type": "function",
+        "async": true,
+        "description": "Kills the GPU process cleanly without generating a crash report.",
+        "parameters": []
+      },
+
+      {
+        "name": "crashGpuProcess",
+        "type": "function",
+        "async": true,
+        "description": "Causes the GPU process to crash.",
+        "parameters": []
+      },
+
+      {
+        "name": "clearHSTSState",
+        "type": "function",
+        "async": true,
+        "description": "Clears the sites on the HSTS list.",
+        "parameters": []
+      },
+
+      {
+        "name": "triggerCookieBannerDetected",
+        "type": "function",
+        "async": true,
+        "description": "Simulates a cookie banner detection",
+        "parameters": [
+          {
+            "type": "number",
+            "name": "tabId"
+          }
+        ]
+      },
+
+      {
+        "name": "triggerCookieBannerHandled",
+        "type": "function",
+        "async": true,
+        "description": "Simulates a cookie banner handling",
+        "parameters": [
+          {
+            "type": "number",
+            "name": "tabId"
+          }
+        ]
+      },
+
+      {
+        "name": "triggerTranslationsOffer",
+        "type": "function",
+        "async": true,
+        "description": "Simulates offering a translation.",
+        "parameters": [
+          {
+            "type": "number",
+            "name": "tabId"
+          }
+        ]
+      },
+
+      {
+        "name": "triggerLanguageStateChange",
+        "type": "function",
+        "async": true,
+        "description": "Simulates expecting a translation.",
+        "parameters": [
+          {
+            "type": "number",
+            "name": "tabId"
+          },
+          {
+            "name": "languageState",
+            "type": "object",
+            "properties": {},
+            "additionalProperties": { "type": "any" }
+          }
+        ]
+      }
+    ]
+  }
+]
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/test-support/test-support.js b/mobile/android/geckoview/src/androidTest/assets/web_extensions/test-support/test-support.js
new file mode 100644
index 0000000000..18e047ca1a
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/test-support/test-support.js
@@ -0,0 +1,60 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+let backgroundPort = null;
+let nativePort = null;
+
+function connectNativePort() {
+  if (nativePort) {
+    return;
+  }
+
+  backgroundPort = browser.runtime.connect();
+  nativePort = browser.runtime.connectNative("browser");
+
+  nativePort.onMessage.addListener(message => {
+    if (message.type) {
+      // This is a session-specific webExtensionApiCall.
+      // Forward to the background script.
+      backgroundPort.postMessage(message);
+    } else if (message.eval) {
+      try {
+        // Using eval here is the whole point of this WebExtension so we can
+        // safely ignore the eslint warning.
+        const response = window.eval(message.eval); // eslint-disable-line no-eval
+        sendResponse(message.id, response);
+      } catch (ex) {
+        sendSyncResponse(message.id, null, ex);
+      }
+    }
+  });
+
+  function sendResponse(id, response, exception) {
+    Promise.resolve(response).then(
+      value => sendSyncResponse(id, value),
+      reason => sendSyncResponse(id, null, reason)
+    );
+  }
+
+  function sendSyncResponse(id, response, exception) {
+    nativePort.postMessage({
+      id,
+      response: JSON.stringify(response),
+      exception: exception && exception.toString(),
+    });
+  }
+}
+
+function disconnectNativePort() {
+  backgroundPort?.disconnect();
+  nativePort?.disconnect();
+  backgroundPort = null;
+  nativePort = null;
+}
+
+window.addEventListener("pageshow", connectNativePort);
+window.addEventListener("pagehide", disconnectNativePort);
+
+// If loading error page, pageshow mightn't fired.
+connectNativePort();
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/update-1/borderify.js b/mobile/android/geckoview/src/androidTest/assets/web_extensions/update-1/borderify.js
new file mode 100644
index 0000000000..9c3728b381
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/update-1/borderify.js
@@ -0,0 +1 @@
+document.body.style.border = "5px solid red";
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/update-1/manifest.json b/mobile/android/geckoview/src/androidTest/assets/web_extensions/update-1/manifest.json
new file mode 100644
index 0000000000..8e54cc4586
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/update-1/manifest.json
@@ -0,0 +1,18 @@
+{
+  "manifest_version": 2,
+  "name": "update",
+  "browser_specific_settings": {
+    "gecko": {
+      "id": "update@example.com",
+      "update_url": "https://example.org/tests/junit/update_manifest.json"
+    }
+  },
+  "version": "1.0",
+  "description": "Adds a red border to all webpages matching example.com.",
+  "content_scripts": [
+    {
+      "matches": ["*://*.example.com/*"],
+      "js": ["borderify.js"]
+    }
+  ]
+}
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/update-2/borderify.js b/mobile/android/geckoview/src/androidTest/assets/web_extensions/update-2/borderify.js
new file mode 100644
index 0000000000..3529928d82
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/update-2/borderify.js
@@ -0,0 +1 @@
+document.body.style.border = "5px solid blue";
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/update-2/manifest.json b/mobile/android/geckoview/src/androidTest/assets/web_extensions/update-2/manifest.json
new file mode 100644
index 0000000000..19570ea5e5
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/update-2/manifest.json
@@ -0,0 +1,17 @@
+{
+  "manifest_version": 2,
+  "name": "update",
+  "browser_specific_settings": {
+    "gecko": {
+      "id": "update@example.com"
+    }
+  },
+  "version": "2.0",
+  "description": "Adds a blue border to all webpages matching example.com.",
+  "content_scripts": [
+    {
+      "matches": ["*://*.example.com/*"],
+      "js": ["borderify.js"]
+    }
+  ]
+}
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/update-postpone-1/background.js b/mobile/android/geckoview/src/androidTest/assets/web_extensions/update-postpone-1/background.js
new file mode 100644
index 0000000000..a301506ca7
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/update-postpone-1/background.js
@@ -0,0 +1,3 @@
+browser.runtime.onUpdateAvailable.addListener(details => {
+  // Do nothing, this is just here to prevent auto update.
+});
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/update-postpone-1/borderify.js b/mobile/android/geckoview/src/androidTest/assets/web_extensions/update-postpone-1/borderify.js
new file mode 100644
index 0000000000..9c3728b381
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/update-postpone-1/borderify.js
@@ -0,0 +1 @@
+document.body.style.border = "5px solid red";
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/update-postpone-1/manifest.json b/mobile/android/geckoview/src/androidTest/assets/web_extensions/update-postpone-1/manifest.json
new file mode 100644
index 0000000000..5011e1ea05
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/update-postpone-1/manifest.json
@@ -0,0 +1,21 @@
+{
+  "manifest_version": 2,
+  "name": "update",
+  "browser_specific_settings": {
+    "gecko": {
+      "id": "update-postpone@example.com",
+      "update_url": "https://example.org/tests/junit/update_manifest.json"
+    }
+  },
+  "background": {
+    "scripts": ["background.js"]
+  },
+  "version": "1.0",
+  "description": "Adds a red border to all webpages matching example.com.",
+  "content_scripts": [
+    {
+      "matches": ["*://*.example.com/*"],
+      "js": ["borderify.js"]
+    }
+  ]
+}
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/update-postpone-2/borderify.js b/mobile/android/geckoview/src/androidTest/assets/web_extensions/update-postpone-2/borderify.js
new file mode 100644
index 0000000000..3529928d82
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/update-postpone-2/borderify.js
@@ -0,0 +1 @@
+document.body.style.border = "5px solid blue";
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/update-postpone-2/manifest.json b/mobile/android/geckoview/src/androidTest/assets/web_extensions/update-postpone-2/manifest.json
new file mode 100644
index 0000000000..720d9ef898
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/update-postpone-2/manifest.json
@@ -0,0 +1,17 @@
+{
+  "manifest_version": 2,
+  "name": "update",
+  "browser_specific_settings": {
+    "gecko": {
+      "id": "update-postpone@example.com"
+    }
+  },
+  "version": "2.0",
+  "description": "Adds a blue border to all webpages matching example.com.",
+  "content_scripts": [
+    {
+      "matches": ["*://*.example.com/*"],
+      "js": ["borderify.js"]
+    }
+  ]
+}
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/update-with-perms-1/borderify.js b/mobile/android/geckoview/src/androidTest/assets/web_extensions/update-with-perms-1/borderify.js
new file mode 100644
index 0000000000..9c3728b381
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/update-with-perms-1/borderify.js
@@ -0,0 +1 @@
+document.body.style.border = "5px solid red";
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/update-with-perms-1/manifest.json b/mobile/android/geckoview/src/androidTest/assets/web_extensions/update-with-perms-1/manifest.json
new file mode 100644
index 0000000000..71b6a1eab9
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/update-with-perms-1/manifest.json
@@ -0,0 +1,18 @@
+{
+  "manifest_version": 2,
+  "name": "update",
+  "browser_specific_settings": {
+    "gecko": {
+      "id": "update-with-perms@example.com",
+      "update_url": "https://example.org/tests/junit/update_manifest.json"
+    }
+  },
+  "version": "1.0",
+  "description": "Adds a red border to all webpages matching example.com.",
+  "content_scripts": [
+    {
+      "matches": ["*://*.example.com/*"],
+      "js": ["borderify.js"]
+    }
+  ]
+}
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/update-with-perms-2/borderify.js b/mobile/android/geckoview/src/androidTest/assets/web_extensions/update-with-perms-2/borderify.js
new file mode 100644
index 0000000000..3529928d82
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/update-with-perms-2/borderify.js
@@ -0,0 +1 @@
+document.body.style.border = "5px solid blue";
diff --git a/mobile/android/geckoview/src/androidTest/assets/web_extensions/update-with-perms-2/manifest.json b/mobile/android/geckoview/src/androidTest/assets/web_extensions/update-with-perms-2/manifest.json
new file mode 100644
index 0000000000..9571bdabb2
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/web_extensions/update-with-perms-2/manifest.json
@@ -0,0 +1,18 @@
+{
+  "manifest_version": 2,
+  "name": "update",
+  "browser_specific_settings": {
+    "gecko": {
+      "id": "update-with-perms@example.com"
+    }
+  },
+  "version": "2.0",
+  "description": "Adds a blue border to all webpages matching example.com.",
+  "content_scripts": [
+    {
+      "matches": ["*://*.example.com/*"],
+      "js": ["borderify.js"]
+    }
+  ],
+  "permissions": ["tabs"]
+}
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-aria-comboboxes.html b/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-aria-comboboxes.html
new file mode 100644
index 0000000000..8816879c1a
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-aria-comboboxes.html
@@ -0,0 +1,11 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+  </head>
+  <body>
+    <div contenteditable role="combobox" aria-label="ARIA 1.0 combobox"></div>
+    <div role="combobox">
+      <input type="text" aria-label="ARIA 1.1 combobox" />
+    </div>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-checkbox.html b/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-checkbox.html
new file mode 100644
index 0000000000..a45cfed92b
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-checkbox.html
@@ -0,0 +1,12 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8" />
+  </head>
+  <body>
+    <label>
+      <input type="checkbox" aria-describedby="desc" />many option
+    </label>
+    <div id="desc">description</div>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-clipboard.html b/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-clipboard.html
new file mode 100644
index 0000000000..c33b48f4e5
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-clipboard.html
@@ -0,0 +1,9 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8" />
+  </head>
+  <body>
+    <input value="hello cruel world" id="input" />
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-collection.html b/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-collection.html
new file mode 100644
index 0000000000..865594ae5b
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-collection.html
@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8" />
+  </head>
+  <body>
+    <ul>
+      <li>One</li>
+      <li><a href="#">Two</a></li>
+    </ul>
+    <ul>
+      <li>
+        1
+        <ul>
+          <li>1.1</li>
+          <li>1.2</li>
+        </ul>
+      </li>
+    </ul>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-expandable.html b/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-expandable.html
new file mode 100644
index 0000000000..8b416cf882
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-expandable.html
@@ -0,0 +1,13 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+  </head>
+  <body>
+    <button
+      onclick="this.setAttribute('aria-expanded', this.getAttribute('aria-expanded') == 'false')"
+      aria-expanded="false"
+    >
+      button
+    </button>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-headings.html b/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-headings.html
new file mode 100644
index 0000000000..280bbd89d7
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-headings.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html><html>
+<head>
+  <meta charset="utf-8">
+</head>
+<body>
+  <a href=\"%23\">preamble</a>
+  <h1>Fried cheese</h1><p>with club sauce.</p>
+  <a href="#"><h2>Popcorn shrimp</h2></a><button>with club sauce.</button>
+  <h3>Chicken fingers</h3><p>with spicy club sauce.</p>
+</body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-links.html b/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-links.html
new file mode 100644
index 0000000000..a108925dc1
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-links.html
@@ -0,0 +1,12 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+  </head>
+  <body>
+    <a href="/">a with href</a>
+    <a>a with no attributes</a>
+    <a name="anchor">a with name</a>
+    <a onclick=";">a with onclick</a>
+    <span role="link">span with role link</span>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-live-region-atomic.html b/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-live-region-atomic.html
new file mode 100644
index 0000000000..85f9f6ccd2
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-live-region-atomic.html
@@ -0,0 +1,12 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8" />
+  </head>
+  <body>
+    <div aria-live="polite" aria-atomic="true" id="container">
+      The time is
+      <p>3pm</p>
+    </div>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-live-region-descendant.html b/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-live-region-descendant.html
new file mode 100644
index 0000000000..82d88613f0
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-live-region-descendant.html
@@ -0,0 +1,9 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8" />
+  </head>
+  <body>
+    <div aria-live="polite"><p id="to_show">I will be shown</p></div>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-live-region-image-labeled-by.html b/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-live-region-image-labeled-by.html
new file mode 100644
index 0000000000..5b91f1f6c2
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-live-region-image-labeled-by.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8" />
+  </head>
+  <body>
+    <img
+      src="data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw=="
+      aria-live="polite"
+      aria-labelledby="l1"
+    />
+    <span id="l1">Hello</span>
+    <span id="l2">Goodbye</span>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-live-region-image.html b/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-live-region-image.html
new file mode 100644
index 0000000000..da05b33c9a
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-live-region-image.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8" />
+  </head>
+  <body>
+    <div aria-live="polite" aria-atomic="true">
+      This picture is
+      <img
+        src="data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw=="
+        alt="happy"
+      />
+    </div>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-live-region.html b/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-live-region.html
new file mode 100644
index 0000000000..c73fb91966
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-live-region.html
@@ -0,0 +1,9 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8" />
+  </head>
+  <body>
+    <div id="to_change" aria-live="polite"></div>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-local-iframe.html b/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-local-iframe.html
new file mode 100644
index 0000000000..0aff253395
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-local-iframe.html
@@ -0,0 +1,21 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <style>
+      body {
+        margin: 0;
+        height: 100%;
+        display: flex;
+        flex-direction: column;
+      }
+      iframe {
+        height: 100%;
+      }
+    </style>
+  </head>
+  <body>
+    Some stuff
+    <iframe src="../hello.html" id="iframe"></iframe>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-move-caret-accessibility-focus.html b/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-move-caret-accessibility-focus.html
new file mode 100644
index 0000000000..d9d1597991
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-move-caret-accessibility-focus.html
@@ -0,0 +1,9 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8" />
+  </head>
+  <body>
+    <p>Hello <a href="foo">sweet</a>, sweet <span>world</span></p>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-mutation.html b/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-mutation.html
new file mode 100644
index 0000000000..5c9c68aca0
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-mutation.html
@@ -0,0 +1,9 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8" />
+  </head>
+  <body>
+    <div><p id="to_show">I will be shown</p></div>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-range.html b/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-range.html
new file mode 100644
index 0000000000..70ef76e624
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-range.html
@@ -0,0 +1,23 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8" />
+  </head>
+  <body>
+    <input type="range" aria-label="Rating" min="1" max="10" value="4" /><input
+      type="range"
+      aria-label="Stars"
+      min="1"
+      max="5"
+      step="0.5"
+      value="4.5"
+    /><input
+      type="range"
+      aria-label="Percent"
+      min="0"
+      max="1"
+      step="0.01"
+      value="0.83"
+    />
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-remote-iframe.html b/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-remote-iframe.html
new file mode 100644
index 0000000000..7e3e5da1ca
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-remote-iframe.html
@@ -0,0 +1,24 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <style>
+      body {
+        margin: 0;
+        height: 100%;
+        display: flex;
+        flex-direction: column;
+      }
+      iframe {
+        height: 100%;
+      }
+    </style>
+  </head>
+  <body>
+    Some stuff
+    <iframe
+      src="https://example.org/tests/junit/hello.html"
+      id="iframe"
+    ></iframe>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-scroll.html b/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-scroll.html
new file mode 100644
index 0000000000..912aab9143
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-scroll.html
@@ -0,0 +1,10 @@
+<meta charset="utf-8" />
+<meta name="viewport" content="width=device-width initial-scale=1" />
+<body style="margin: 0">
+  <div style="height: 100vh"></div>
+  <button>Hello</button>
+  <p style="margin: 0">
+    Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod
+    tempor incididunt ut labore et dolore magna aliqua.
+  </p>
+</body>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-selectable.html b/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-selectable.html
new file mode 100644
index 0000000000..f30951ff83
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-selectable.html
@@ -0,0 +1,22 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8" />
+  </head>
+  <body>
+    <ul style="list-style-type: none" role="listbox">
+      <li
+        id="li"
+        role="option"
+        onclick="this.setAttribute('aria-selected',
+          this.getAttribute('aria-selected') == 'true' ? 'false' : 'true')"
+      >
+        1
+      </li>
+      <li role="option" aria-selected="false">2</li>
+    </ul>
+    <li id="outsideSelectable" role="option" tabindex="0">
+      outside selectable
+    </li>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-text-entry-node.html b/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-text-entry-node.html
new file mode 100644
index 0000000000..002efc9f14
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-text-entry-node.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8" />
+  </head>
+  <body>
+    <input aria-label="Name" aria-describedby="desc" value="Tobias" />
+    <div id="desc">description</div>
+    <input aria-label="Last" value="Funke" required />
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-tree.html b/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-tree.html
new file mode 100644
index 0000000000..81ab105c7d
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/accessibility/test-tree.html
@@ -0,0 +1,10 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8" />
+  </head>
+  <body>
+    <label for="name">Name:</label
+    ><input id="name" type="text" value="Julie" /><button>Submit</button>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/address_form.html b/mobile/android/geckoview/src/androidTest/assets/www/address_form.html
new file mode 100644
index 0000000000..d247c5ce79
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/address_form.html
@@ -0,0 +1,21 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <title>Address form</title>
+  </head>
+  <body>
+    <form>
+      <input autocomplete="name" id="name" />
+      <input autocomplete="given-name" id="givenName" />
+      <input autocomplete="additional-name" id="additionalName" />
+      <input autocomplete="family-name" id="familyName" />
+      <input autocomplete="street-address" id="streetAddress" />
+      <input autocomplete="country" id="country" />
+      <input autocomplete="postal-code" id="postalCode" />
+      <input autocomplete="organization" id="organization" />
+      <input autocomplete="email" id="email" />
+      <input autocomplete="tel" id="tel" />
+      <input type="submit" value="Submit" />
+    </form>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/audio/owl.mp3 b/mobile/android/geckoview/src/androidTest/assets/www/audio/owl.mp3
new file mode 100644
index 0000000000..9fafa32f93
Binary files /dev/null and b/mobile/android/geckoview/src/androidTest/assets/www/audio/owl.mp3 differ
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/autoplay.html b/mobile/android/geckoview/src/androidTest/assets/www/autoplay.html
new file mode 100644
index 0000000000..24cbf474bd
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/autoplay.html
@@ -0,0 +1,11 @@
+<html>
+    <head>
+        <meta charset="utf-8">
+        <title>WEBM Video</title>
+    </head>
+    <body>
+        <video preload autoplay>
+            <source src="videos/gizmo.webm"></source>
+        </video>
+    </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/badVideoPath.html b/mobile/android/geckoview/src/androidTest/assets/www/badVideoPath.html
new file mode 100644
index 0000000000..d9b34843fd
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/badVideoPath.html
@@ -0,0 +1,11 @@
+<html>
+    <head>
+        <meta charset="utf-8">
+        <title>Bad Video Path</title>
+    </head>
+    <body>
+        <video controls preload>
+            <source src="videos/fileDoesNotExist.ogg"></source>
+        </video>
+    </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/beforeunload.html b/mobile/android/geckoview/src/androidTest/assets/www/beforeunload.html
new file mode 100644
index 0000000000..d521afe532
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/beforeunload.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8" />
+  </head>
+  <body onbeforeunload="return beforeUnload()">
+    <a id="navigateAway" href="./hello.html">Click Me</a>
+    <a id="navigateAway2" href="./hello2.html">Click Me</a>
+    <script>
+      function beforeUnload() {
+        return "Please don't leave.";
+      }
+    </script>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/cc_form.html b/mobile/android/geckoview/src/androidTest/assets/www/cc_form.html
new file mode 100644
index 0000000000..7b3ea2a1bb
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/cc_form.html
@@ -0,0 +1,22 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <title>Form Autofill Test: Credit Card</title>
+  </head>
+  <body>
+    <form id="form1">
+      <input autocomplete="cc-name" id="name" />
+      <input autocomplete="cc-number" id="number" />
+      <input autocomplete="cc-exp-month" id="expMonth" />
+      <input autocomplete="cc-exp-year" id="expYear" />
+      <input type="submit" value="Submit" />
+    </form>
+    <!-- form2 uses a single expiration date field -->
+    <form id="form2">
+      <input autocomplete="cc-name" id="name" />
+      <input autocomplete="cc-number" id="number" />
+      <input autocomplete="cc-exp" id="exp" />
+      <input type="submit" value="Submit" />
+    </form>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/clickToReload.html b/mobile/android/geckoview/src/androidTest/assets/www/clickToReload.html
new file mode 100644
index 0000000000..47bdceccee
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/clickToReload.html
@@ -0,0 +1,10 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <title>Hello, world!</title>
+    <meta name="viewport" content="initial-scale=1.0" />
+  </head>
+  <body style="height: 100%" onclick="window.location.reload()">
+    <p>Hello, world!</p>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/clipboard_read.html b/mobile/android/geckoview/src/androidTest/assets/www/clipboard_read.html
new file mode 100644
index 0000000000..19a034a23d
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/clipboard_read.html
@@ -0,0 +1,22 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <title>Hello, world!</title>
+    <meta name="viewport" content="initial-scale=1.0" />
+  </head>
+  <body style="height: 100%">
+    <p>Hello, world!</p>
+    <script>
+      document.body.addEventListener("click", () => {
+        navigator.clipboard
+          .readText()
+          .then(() => {
+            window.alert("allow");
+          })
+          .catch(() => {
+            window.alert("deny");
+          });
+      });
+    </script>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/color_grid.html b/mobile/android/geckoview/src/androidTest/assets/www/color_grid.html
new file mode 100644
index 0000000000..ebc989acdb
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/color_grid.html
@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8" content="width=device-width, height=device-height" />
+    <title>Color Grid</title>
+  </head>
+  <style>
+    body {
+      margin: 0;
+    }
+    .container {
+      display: grid;
+      grid-template-columns: 1fr 1fr 1fr;
+    }
+    .box {
+      height: 100vh;
+      width: 33.33vw;
+    }
+    .red {
+      background-color: rgb(255, 0, 0);
+      color-adjust: exact;
+    }
+    .green {
+      background-color: rgb(0, 255, 0);
+      color-adjust: exact;
+    }
+    .blue {
+      background-color: rgb(0, 0, 255);
+      color-adjust: exact;
+    }
+  </style>
+
+  <body>
+    <div class="container">
+      <div class="red box"></div>
+      <div class="green box"></div>
+      <div class="blue box"></div>
+    </div>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/color_orange_background.html b/mobile/android/geckoview/src/androidTest/assets/www/color_orange_background.html
new file mode 100644
index 0000000000..8a682d79a7
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/color_orange_background.html
@@ -0,0 +1,29 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8" content="width=device-width, height=device-height" />
+    <title>Orange Print Background</title>
+  </head>
+  <style>
+    .box {
+      height: 100vh;
+      width: 100vw;
+    }
+    @media screen {
+      .background {
+        background-color: rgb(0, 0, 255);
+        color-adjust: exact;
+      }
+    }
+    @media print {
+      .background {
+        background-color: rgb(255, 113, 57);
+        color-adjust: exact;
+      }
+    }
+  </style>
+
+  <body>
+    <div class="box background"></div>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/colors.html b/mobile/android/geckoview/src/androidTest/assets/www/colors.html
new file mode 100644
index 0000000000..b00da3ed9c
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/colors.html
@@ -0,0 +1,23 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <title>Colours</title>
+  </head>
+  <!-- background contains one extra transparent.gif because we want trick the
+      contentful paint detection; We want to make sure the background is loaded
+      before the test starts so we always wait for the contentful paint timestamp
+      to exist, however, gradient isn't considered as contentful per spec, so Gecko
+      wouldn't generate a timestamp for it. Hence, we added a transparent gif
+      to the image list to trick the detection. !-->
+  <body
+    style="
+      overflow: hidden;
+      height: 100%;
+      width: 100%;
+      margin: 0px;
+      padding: 0px;
+      background: url('/assets/www/transparent.gif'),
+        linear-gradient(135deg, red, white);
+    "
+  ></body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/context_menu_audio.html b/mobile/android/geckoview/src/androidTest/assets/www/context_menu_audio.html
new file mode 100644
index 0000000000..b26323a13e
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/context_menu_audio.html
@@ -0,0 +1,20 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8" content="width=device-width, height=device-height" />
+    <title>Context Menu Test Audio</title>
+  </head>
+  <style>
+    body {
+      margin: 0;
+    }
+  </style>
+  <body>
+    <div class="center-audio">
+      <audio controls src="audio/owl.mp3">
+        Your browser does not support the
+        <code>audio</code> element.
+      </audio>
+    </div>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/context_menu_blob_buffered.html b/mobile/android/geckoview/src/androidTest/assets/www/context_menu_blob_buffered.html
new file mode 100644
index 0000000000..9849747a41
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/context_menu_blob_buffered.html
@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8" content="width=device-width, height=device-height" />
+    <title>Context Menu Test Blob Buffered</title>
+  </head>
+  <body>
+    <video id="video" controls preload></video>
+  </body>
+  <script>
+    window.addEventListener("DOMContentLoaded", function (e) {
+      const video = document.getElementById("video");
+      const mediaSource = new MediaSource();
+      video.src = URL.createObjectURL(mediaSource);
+      mediaSource.addEventListener("sourceopen", createBuffer);
+
+      function createBuffer(event) {
+        const mediaSource = event.target;
+        const assetURL = "/assets/www/videos/gizmo.webm";
+        const codec = 'video/webm; codecs="opus"';
+        const sourceBuffer = mediaSource.addSourceBuffer(codec);
+
+        function addBuffer(response) {
+          sourceBuffer.addEventListener("updateend", function () {
+            mediaSource.endOfStream();
+          });
+          sourceBuffer.appendBuffer(response);
+        }
+
+        fetchVideoData(assetURL, addBuffer);
+      }
+
+      function fetchVideoData(assetURL, videoArrayBuffer) {
+        const request = new XMLHttpRequest();
+        request.open("get", assetURL);
+        request.responseType = "arraybuffer";
+        request.onload = function () {
+          videoArrayBuffer(request.response);
+        };
+        request.send();
+      }
+    });
+  </script>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/context_menu_blob_full.html b/mobile/android/geckoview/src/androidTest/assets/www/context_menu_blob_full.html
new file mode 100644
index 0000000000..5ebc2bddba
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/context_menu_blob_full.html
@@ -0,0 +1,22 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8" content="width=device-width, height=device-height" />
+    <title>Context Menu Test Blob</title>
+  </head>
+  <body>
+    <div id="image_container"></div>
+  </body>
+  <script>
+    window.addEventListener("DOMContentLoaded", function (e) {
+      const svg = `<svg viewBox="0 0 100 100" xmlns="http://www.w3.org/2000/svg">
+                            <circle cx="50" cy="50" r="50" stroke="orange" fill="transparent" stroke-width="5"/>
+                         </svg>`;
+      const image = document.createElement("img");
+      const blob = new Blob([svg], { type: "image/svg+xml" });
+      image.src = URL.createObjectURL(blob);
+      image.alt = "An orange circle.";
+      document.getElementById("image_container").appendChild(image);
+    });
+  </script>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/context_menu_image.html b/mobile/android/geckoview/src/androidTest/assets/www/context_menu_image.html
new file mode 100644
index 0000000000..9564f94628
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/context_menu_image.html
@@ -0,0 +1,10 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8" content="width=device-width, height=device-height" />
+    <title>Context Menu Test Image</title>
+  </head>
+  <body>
+    <img id="image" src="images/test.gif" alt="Test Image" />
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/context_menu_image_nested.html b/mobile/android/geckoview/src/androidTest/assets/www/context_menu_image_nested.html
new file mode 100644
index 0000000000..99563d66f5
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/context_menu_image_nested.html
@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8" content="width=device-width, height=device-height" />
+    <title>Context Menu Test Nested Image</title>
+  </head>
+  <body>
+    <div>
+      <div>
+        <img id="image" src="images/test.gif" alt="Test Image" />
+      </div>
+    </div>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/context_menu_link.html b/mobile/android/geckoview/src/androidTest/assets/www/context_menu_link.html
new file mode 100644
index 0000000000..e5b0d0d316
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/context_menu_link.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8" content="width=device-width, height=device-height" />
+    <title>Context Menu Test Link</title>
+  </head>
+  <style>
+    #hello {
+      font-size: 20vw;
+    }
+  </style>
+  <body>
+    <a href="hello.html" title="Hello Link Title" id="hello">Hello World</a>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/context_menu_video.html b/mobile/android/geckoview/src/androidTest/assets/www/context_menu_video.html
new file mode 100644
index 0000000000..bca8e46afe
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/context_menu_video.html
@@ -0,0 +1,12 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <meta charset="utf-8" content="width=device-width, height=device-height">
+        <title>Context Menu Test Video</title>
+    </head>
+    <body>
+        <video controls preload>
+            <source src="videos/short.mp4"></source>
+        </video>
+    </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/data_uri.html b/mobile/android/geckoview/src/androidTest/assets/www/data_uri.html
new file mode 100644
index 0000000000..638e4c754c
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/data_uri.html
@@ -0,0 +1,14 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <title>Link with a giant data URI</title>
+  </head>
+  <body>
+    <a href="insert uri here" id="smallLink">Open small link</a>
+    <a href="insert uri here" id="largeLink">Open large link</a>
+    <img src="/assets/www/images/test.gif" id="image" />
+    <script language="JavaScript">
+      var imageLoaded = false;
+    </script>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/dnd.html b/mobile/android/geckoview/src/androidTest/assets/www/dnd.html
new file mode 100644
index 0000000000..0dc36b4f9a
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/dnd.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta name="viewport" content="width=device-width,initial-scale=1" />
+    <script>
+      document.addEventListener("DOMContentLoaded", () =>
+        document
+          .querySelector("#drop")
+          .addEventListener("dragover", e => e.preventDefault())
+      );
+    </script>
+  </head>
+  <body>
+    <img
+      id="drag"
+      draggable="true"
+      src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVQIW2PwmvDoPwAFoAK895OuoAAAAABJRU5ErkJggg=="
+      width="200"
+      height="100"
+    />
+    <br />
+    <div id="drop" style="border: 1px solid red; width: 200px; height: 100px">
+      drop
+    </div>
+    <textarea id="textarea" style="width: 200px; height: 100px"></textarea>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/download.html b/mobile/android/geckoview/src/androidTest/assets/www/download.html
new file mode 100644
index 0000000000..4f06323dc6
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/download.html
@@ -0,0 +1,18 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+  </head>
+  <body>
+    <script>
+      const blob = new Blob(["Downloaded Data"], { type: "text/plain" });
+      const element = document.createElement("a");
+      const uri = URL.createObjectURL(blob);
+      element.href = uri;
+      element.download = "download.txt";
+      element.style.display = "none";
+      document.body.appendChild(element);
+      element.click();
+      URL.revokeObjectURL(uri);
+    </script>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/fedcm_accounts_endpoint.json b/mobile/android/geckoview/src/androidTest/assets/www/fedcm_accounts_endpoint.json
new file mode 100644
index 0000000000..5a8f6eeb30
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/fedcm_accounts_endpoint.json
@@ -0,0 +1,12 @@
+{
+  "accounts": [
+    {
+      "id": "$RANDOM_ID",
+      "given_name": "",
+      "name": " ",
+      "email": "demo",
+      "picture": "http://localhost:4245/assets/www/images/test.gif",
+      "approved_clients": ["fedcm_rp.html"]
+    }
+  ]
+}
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/fedcm_idp_manifest.json b/mobile/android/geckoview/src/androidTest/assets/www/fedcm_idp_manifest.json
new file mode 100644
index 0000000000..bc66100e6a
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/fedcm_idp_manifest.json
@@ -0,0 +1,18 @@
+{
+  "accounts_endpoint": "fedcm_accounts_endpoint.json",
+  "client_metadata_endpoint": "fedcm_idp_metadata.json",
+  "id_assertion_endpoint": "fedcm_idtokens_endpoint.json",
+  "id_token_endpoint": "fedcm_idtokens_endpoint.json",
+  "revocation_endpoint": "revocation_endpoint",
+  "branding": {
+    "background_color": "0x6200ee",
+    "color": "0xffffff",
+    "icons": [
+      {
+        "url": "http://localhost:4245/assets/www/images/test.gif",
+        "size": 256
+      }
+    ],
+    "name": "Demo IDP"
+  }
+}
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/fedcm_idp_metadata.json b/mobile/android/geckoview/src/androidTest/assets/www/fedcm_idp_metadata.json
new file mode 100644
index 0000000000..db9b9deaf8
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/fedcm_idp_metadata.json
@@ -0,0 +1,4 @@
+{
+  "privacy_policy_url": "privacy_policy",
+  "terms_of_service_url": "terms_of_service"
+}
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/fedcm_idtokens_endpoint.json b/mobile/android/geckoview/src/androidTest/assets/www/fedcm_idtokens_endpoint.json
new file mode 100644
index 0000000000..ba6edfe281
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/fedcm_idtokens_endpoint.json
@@ -0,0 +1,3 @@
+{
+  "token": "token"
+}
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/fedcm_rp.html b/mobile/android/geckoview/src/androidTest/assets/www/fedcm_rp.html
new file mode 100644
index 0000000000..4d1fddee7f
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/fedcm_rp.html
@@ -0,0 +1,8 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <title>Hello, world!</title>
+    <link rel="manifest" href="manifest.webmanifest" />
+  </head>
+  <body></body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/fixedbottom.html b/mobile/android/geckoview/src/androidTest/assets/www/fixedbottom.html
new file mode 100644
index 0000000000..b802bb335b
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/fixedbottom.html
@@ -0,0 +1,36 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <title>Fixed bottom element</title>
+  </head>
+  <!-- background contains one extra transparent.gif because we want trick the
+      contentful paint detection; We want to make sure the background is loaded
+      before the test starts so we always wait for the contentful paint timestamp
+      to exist, however, gradient isn't considered as contentful per spec, so Gecko
+      wouldn't generate a timestamp for it. Hence, we added a transparent gif
+      to the image list to trick the detection. !-->
+  <body
+    style="
+      overflow: hidden;
+      height: 100%;
+      width: 100%;
+      margin: 0px;
+      padding: 0px;
+      background: url('/assets/www/transparent.gif'),
+        linear-gradient(135deg, blue, blue);
+    "
+  >
+    <div
+      id="bottom-banner"
+      style="
+        width: 100%;
+        position: fixed;
+        bottom: 0;
+        left: 0;
+        background-color: lime;
+        height: 10%;
+      "
+    ></div>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/fixedpercent.html b/mobile/android/geckoview/src/androidTest/assets/www/fixedpercent.html
new file mode 100644
index 0000000000..587df00473
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/fixedpercent.html
@@ -0,0 +1,25 @@
+<!DOCTYPE html>
+<meta charset="utf-8" />
+<meta name="viewport" content="width=device-width, minimum-scale=0.5" />
+<style>
+  html {
+    width: 100%;
+    height: 100%;
+    scrollbar-width: none;
+  }
+  body {
+    width: 200%;
+    height: 2000px;
+    margin: 0;
+    padding: 0;
+  }
+
+  #fixed-element {
+    width: 100%;
+    height: 200%;
+    position: fixed;
+    top: 0px;
+    background-color: green;
+  }
+</style>
+<div id="fixed-element"></div>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/fixedvh.html b/mobile/android/geckoview/src/androidTest/assets/www/fixedvh.html
new file mode 100644
index 0000000000..fd6661c2cd
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/fixedvh.html
@@ -0,0 +1,25 @@
+<!DOCTYPE html>
+<meta charset="utf-8" />
+<meta name="viewport" content="width=device-width, minimum-scale=0.5" />
+<style>
+  html {
+    width: 100%;
+    height: 100%;
+    scrollbar-width: none;
+  }
+  body {
+    width: 200%;
+    height: 2000px;
+    margin: 0;
+    padding: 0;
+  }
+
+  #fixed-element {
+    width: 100%;
+    height: 200vh;
+    position: fixed;
+    top: 0px;
+    background-color: green;
+  }
+</style>
+<div id="fixed-element"></div>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/form_blank.html b/mobile/android/geckoview/src/androidTest/assets/www/form_blank.html
new file mode 100644
index 0000000000..918cc4cb7a
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/form_blank.html
@@ -0,0 +1,20 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <title>Forms</title>
+    <meta name="viewport" content="minimum-scale=1,width=device-width" />
+  </head>
+  <body>
+    <form
+      id="form1"
+      name="form1"
+      action="form_blank.html"
+      method="get"
+      target="_blank"
+    >
+      <input type="text" id="search" value="foo" />
+      <input type="submit" />
+    </form>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/forms.html b/mobile/android/geckoview/src/androidTest/assets/www/forms.html
new file mode 100644
index 0000000000..06c2ed64db
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/forms.html
@@ -0,0 +1,34 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <title>Forms</title>
+    <meta name="viewport" content="minimum-scale=1,width=device-width" />
+  </head>
+  <body>
+    <form id="form1">
+      <input type="text" id="user1" value="foo" />
+      <input type="password" id="pass1" value="foo" />
+      <input type="email" id="email1" value="@" />
+      <input type="number" id="number1" value="0" />
+      <input type="tel" id="tel1" value="0" />
+      <input type="submit" value="submit" />
+    </form>
+    <input type="Text" id="user2" value="foo" />
+    <input type="PassWord" id="pass2" maxlength="8" value="foo" />
+    <input type="button" id="button1" value="foo" />
+    <input type="checkbox" id="checkbox1" />
+    <input type="search" id="search1" />
+    <input type="url" id="url1" />
+    <input type="hidden" id="hidden1" value="foo" />
+
+    <iframe id="iframe"></iframe>
+  </body>
+  <script>
+    addEventListener("load", function (e) {
+      if (window.parent === window) {
+        document.getElementById("iframe").contentWindow.location.href =
+          window.location.href;
+      }
+    });
+  </script>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/forms2.html b/mobile/android/geckoview/src/androidTest/assets/www/forms2.html
new file mode 100644
index 0000000000..06ab5ec448
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/forms2.html
@@ -0,0 +1,17 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <title>Forms2</title>
+  </head>
+  <body>
+    <form>
+      <fieldset>
+        <input type="text" id="firstname" />
+        <input type="text" id="lastname" />
+        <input type="text" id="user1" value="foo" />
+        <input type="password" id="pass1" value="foo" autofocus />
+      </fieldset>
+    </form>
+    <iframe id="iframe" src="forms2_iframe.html"></iframe>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/forms2_iframe.html b/mobile/android/geckoview/src/androidTest/assets/www/forms2_iframe.html
new file mode 100644
index 0000000000..849fa43271
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/forms2_iframe.html
@@ -0,0 +1,16 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <title>Forms2 iframe</title>
+  </head>
+  <body>
+    <form>
+      <fieldset>
+        <input type="text" id="firstname" />
+        <input type="text" id="lastname" />
+        <input type="text" id="user1" value="foo" />
+        <input type="password" id="pass1" value="foo" autofocus />
+      </fieldset>
+    </form>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/forms3.html b/mobile/android/geckoview/src/androidTest/assets/www/forms3.html
new file mode 100644
index 0000000000..91bceb3943
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/forms3.html
@@ -0,0 +1,14 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <title>Forms</title>
+    <meta name="viewport" content="minimum-scale=1,width=device-width" />
+  </head>
+  <body>
+    <form id="form1">
+      <input type="text" id="user1" placeholder="username" />
+      <input type="password" id="pass1" placeholder="password" />
+      <input type="submit" value="submit" />
+    </form>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/forms4.html b/mobile/android/geckoview/src/androidTest/assets/www/forms4.html
new file mode 100644
index 0000000000..3650635396
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/forms4.html
@@ -0,0 +1,14 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <title>Forms</title>
+    <meta name="viewport" content="minimum-scale=1,width=device-width" />
+  </head>
+  <body>
+    <form id="form1">
+      <input type="text" id="user1" />
+      <input type="password" id="pass1" autocomplete="new-password" />
+      <input type="submit" value="submit" />
+    </form>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/forms5.html b/mobile/android/geckoview/src/androidTest/assets/www/forms5.html
new file mode 100644
index 0000000000..b9da67f343
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/forms5.html
@@ -0,0 +1,24 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <title>Forms</title>
+    <meta name="viewport" content="minimum-scale=1,width=device-width" />
+  </head>
+  <body>
+    <form id="form1">
+      <input type="text" id="user1" value="foo" />
+      <input type="password" id="pass1" value="foo" />
+      <input type="email" id="email1" value="@" />
+      <input type="number" id="number1" value="0" />
+      <input type="tel" id="tel1" value="0" />
+      <input type="submit" value="submit" />
+    </form>
+    <input type="Text" id="user2" value="foo" />
+    <input type="PassWord" id="pass2" maxlength="8" value="foo" />
+    <input type="button" id="button1" value="foo" />
+    <input type="checkbox" id="checkbox1" />
+    <input type="search" id="search1" />
+    <input type="url" id="url1" />
+    <input type="hidden" id="hidden1" value="foo" />
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/forms_autocomplete.html b/mobile/android/geckoview/src/androidTest/assets/www/forms_autocomplete.html
new file mode 100644
index 0000000000..81401a1d27
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/forms_autocomplete.html
@@ -0,0 +1,16 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <title>Forms</title>
+    <meta name="viewport" content="minimum-scale=1,width=device-width" />
+  </head>
+  <body>
+    <form>
+      <input type="text" autocomplete="email" autofocus />
+      <input type="text" autocomplete="username" />
+      <input type="password" />
+      <input type="submit" value="submit" />
+    </form>
+    <iframe id="iframe" src="forms_autocomplete_iframe.html"></iframe>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/forms_autocomplete_iframe.html b/mobile/android/geckoview/src/androidTest/assets/www/forms_autocomplete_iframe.html
new file mode 100644
index 0000000000..11137531ba
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/forms_autocomplete_iframe.html
@@ -0,0 +1,15 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <title>Forms</title>
+    <meta name="viewport" content="minimum-scale=1,width=device-width" />
+  </head>
+  <body>
+    <form>
+      <input type="text" autocomplete="email" autofocus />
+      <input type="text" autocomplete="username" />
+      <input type="password" />
+      <input type="submit" value="submit" />
+    </form>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/forms_id_value.html b/mobile/android/geckoview/src/androidTest/assets/www/forms_id_value.html
new file mode 100644
index 0000000000..522dbc1600
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/forms_id_value.html
@@ -0,0 +1,12 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <title>Forms ID Value</title>
+    <meta name="viewport" content="minimum-scale=1,width=device-width" />
+  </head>
+  <body>
+    <form id="form1">
+      <input type="password" id="value" />
+    </form>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/forms_iframe.html b/mobile/android/geckoview/src/androidTest/assets/www/forms_iframe.html
new file mode 100644
index 0000000000..2c0ef7dff5
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/forms_iframe.html
@@ -0,0 +1,58 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <title>Forms iframe</title>
+    <meta name="viewport" content="minimum-scale=1,width=device-width" />
+  </head>
+  <body>
+    <form id="form1">
+      <input type="text" id="user1" value="foo" />
+      <input type="password" id="pass1" value="foo" />
+      <input type="email" id="email1" value="@" />
+      <input type="number" id="number1" value="0" />
+      <input type="tel" id="tel1" value="0" />
+      <input type="submit" value="submit" />
+    </form>
+    <input type="Text" id="user2" value="foo" />
+    <input type="PassWord" id="pass2" maxlength="8" value="foo" />
+    <input type="button" id="button1" value="foo" />
+    <input type="checkbox" id="checkbox1" />
+    <input type="search" id="search1" />
+    <input type="url" id="url1" />
+    <input type="hidden" id="hidden1" value="foo" />
+  </body>
+  <script>
+    const params = new URL(document.location).searchParams;
+
+    function getEventInterface(event) {
+      if (event instanceof document.defaultView.InputEvent) {
+        return "InputEvent";
+      }
+      if (event instanceof document.defaultView.UIEvent) {
+        return "UIEvent";
+      }
+      if (event instanceof document.defaultView.Event) {
+        return "Event";
+      }
+      return "Unknown";
+    }
+
+    function getData(key, value) {
+      return new Promise(resolve =>
+        document.querySelector(key).addEventListener(
+          "input",
+          event => {
+            resolve([key, event.target.value, value, getEventInterface(event)]);
+          },
+          { once: true }
+        )
+      );
+    }
+
+    window.addEventListener("message", async event => {
+      const { data, source, origin } = event;
+      source.postMessage(await getData(data.key, data.value), origin);
+    });
+  </script>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/forms_xorigin.html b/mobile/android/geckoview/src/androidTest/assets/www/forms_xorigin.html
new file mode 100644
index 0000000000..ebd86c59a1
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/forms_xorigin.html
@@ -0,0 +1,77 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <title>Forms</title>
+    <meta name="viewport" content="minimum-scale=1,width=device-width" />
+  </head>
+  <body>
+    <form id="form1">
+      <input type="text" id="user1" value="foo" />
+      <input type="password" id="pass1" value="foo" />
+      <input type="email" id="email1" value="@" />
+      <input type="number" id="number1" value="0" />
+      <input type="tel" id="tel1" value="0" />
+      <input type="submit" value="submit" />
+    </form>
+    <input type="Text" id="user2" value="foo" />
+    <input type="PassWord" id="pass2" maxlength="8" value="foo" />
+    <input type="button" id="button1" value="foo" />
+    <input type="checkbox" id="checkbox1" />
+    <input type="search" id="search1" />
+    <input type="url" id="url1" />
+    <input type="hidden" id="hidden1" value="foo" />
+
+    <iframe
+      id="iframe"
+      src="http://example.org/tests/junit/forms_iframe.html"
+    ></iframe>
+  </body>
+  <script>
+    const params = new URL(document.location).searchParams;
+    const iframe = document.getElementById("iframe").contentWindow;
+
+    function getEventInterface(event) {
+      if (event instanceof document.defaultView.InputEvent) {
+        return "InputEvent";
+      }
+      if (event instanceof document.defaultView.UIEvent) {
+        return "UIEvent";
+      }
+      if (event instanceof document.defaultView.Event) {
+        return "Event";
+      }
+      return "Unknown";
+    }
+
+    function getData(key, value) {
+      return new Promise(resolve =>
+        document.querySelector(key).addEventListener(
+          "input",
+          event => {
+            resolve([key, event.target.value, value, getEventInterface(event)]);
+          },
+          { once: true }
+        )
+      );
+    }
+
+    window.getDataForAllFrames = function (key, value) {
+      const data = [];
+      data.push(
+        new Promise(resolve =>
+          window.addEventListener(
+            "message",
+            event => {
+              resolve(event.data);
+            },
+            { once: true }
+          )
+        )
+      );
+      iframe.postMessage({ key, value }, "*");
+      data.push(getData(key, value));
+      return Promise.all(data);
+    };
+  </script>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/fullscreen.html b/mobile/android/geckoview/src/androidTest/assets/www/fullscreen.html
new file mode 100644
index 0000000000..f7d4feb3a4
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/fullscreen.html
@@ -0,0 +1,9 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <title>Fullscreen</title>
+  </head>
+  <body>
+    <div id="fullscreen">Fullscreen Div</div>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/getusermedia_xorigin_container.html b/mobile/android/geckoview/src/androidTest/assets/www/getusermedia_xorigin_container.html
new file mode 100644
index 0000000000..2ba4a89b54
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/getusermedia_xorigin_container.html
@@ -0,0 +1,58 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <title>GetUserMedia from cross-origin iframe: the container document</title>
+  </head>
+  <body>
+    <iframe
+      id="iframe_no_allow"
+      src="http://127.0.0.1:4245/assets/www/getusermedia_xorigin_iframe.html"
+    ></iframe>
+    <iframe
+      id="iframe"
+      allow="camera;microphone"
+      src="http://127.0.0.1:4245/assets/www/getusermedia_xorigin_iframe.html"
+    ></iframe>
+    <script>
+      "use strict";
+
+      let iframeWindow;
+      let generation = 1;
+
+      async function Send(obj) {
+        obj.gen = generation++;
+        iframeWindow.postMessage(obj, "http://127.0.0.1:4245");
+        while (true) {
+          const {
+            data: { gen, result },
+          } = await new Promise(r => (window.onmessage = r));
+          if (gen == obj.gen) {
+            return result;
+          }
+        }
+      }
+
+      function Start(constraints) {
+        if (iframeWindow) {
+          return "iframe mode already decided";
+        }
+        iframeWindow = document.getElementById("iframe").contentWindow;
+        return Send({ name: "start", constraints });
+      }
+
+      function StartNoAllow(constraints) {
+        if (iframeWindow) {
+          return "iframe mode already decided";
+        }
+        iframeWindow = document.getElementById("iframe_no_allow").contentWindow;
+        return Send({ name: "start", constraints });
+      }
+
+      async function Stop() {
+        const result = await Send({ name: "stop" });
+        iframeWindow = undefined;
+        return result;
+      }
+    </script>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/getusermedia_xorigin_iframe.html b/mobile/android/geckoview/src/androidTest/assets/www/getusermedia_xorigin_iframe.html
new file mode 100644
index 0000000000..3649167c25
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/getusermedia_xorigin_iframe.html
@@ -0,0 +1,39 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <title>GetUserMedia from cross-origin iframe: the iframe document</title>
+  </head>
+  <body>
+    <script>
+      "use strict";
+
+      let stream;
+      window.addEventListener(
+        "message",
+        async ({ data: { name, gen, constraints } }) => {
+          if (name == "start") {
+            try {
+              stream = await navigator.mediaDevices.getUserMedia(constraints);
+              Send({ gen, result: "ok" });
+            } catch (e) {
+              Send({ gen, result: `${e}` });
+            }
+          } else if (name == "stop") {
+            const result = !!stream;
+            if (stream) {
+              for (const t of stream.getTracks()) {
+                t.stop();
+              }
+              stream = undefined;
+            }
+            Send({ gen, result });
+          }
+        }
+      );
+
+      function Send(obj) {
+        window.parent.postMessage(obj, "http://localhost:4245");
+      }
+    </script>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/hello.html b/mobile/android/geckoview/src/androidTest/assets/www/hello.html
new file mode 100644
index 0000000000..5ebd20f929
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/hello.html
@@ -0,0 +1,10 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <title>Hello, world!</title>
+    <link rel="manifest" href="manifest.webmanifest" />
+  </head>
+  <body>
+    <p>Hello, world!</p>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/hello2.html b/mobile/android/geckoview/src/androidTest/assets/www/hello2.html
new file mode 100644
index 0000000000..d03c2d5521
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/hello2.html
@@ -0,0 +1,9 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <title>Hello, world! Again!</title>
+  </head>
+  <body>
+    <p>Hello, world! Again!</p>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/helloPDFWorld.pdf b/mobile/android/geckoview/src/androidTest/assets/www/helloPDFWorld.pdf
new file mode 100755
index 0000000000..0f429e1a90
Binary files /dev/null and b/mobile/android/geckoview/src/androidTest/assets/www/helloPDFWorld.pdf differ
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/hsts_header.sjs b/mobile/android/geckoview/src/androidTest/assets/www/hsts_header.sjs
new file mode 100644
index 0000000000..e53ad908fa
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/hsts_header.sjs
@@ -0,0 +1,6 @@
+function handleRequest(request, response) {
+  response.setHeader(
+    "Strict-Transport-Security",
+    "max-age=60; includeSubDomains"
+  );
+}
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/hungScript.html b/mobile/android/geckoview/src/androidTest/assets/www/hungScript.html
new file mode 100644
index 0000000000..6b56f4e2e7
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/hungScript.html
@@ -0,0 +1,16 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <title>Hung Script</title>
+  </head>
+  <body>
+    <div id="content"></div>
+  </body>
+  <script>
+    var start = new Date().getTime();
+    document.getElementById("content").innerHTML = "Started";
+    // eslint-disable-next-line no-empty
+    while (new Date().getTime() - start < 5000) {}
+    document.getElementById("content").innerHTML = "Finished";
+  </script>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/iframe_100_percent_height_no_scrollable.html b/mobile/android/geckoview/src/androidTest/assets/www/iframe_100_percent_height_no_scrollable.html
new file mode 100644
index 0000000000..3e7bd5cdd0
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/iframe_100_percent_height_no_scrollable.html
@@ -0,0 +1,60 @@
+<!DOCTYPE html>
+<html>
+  <meta charset="utf-8" />
+  <meta name="viewport" content="width=device-width, user-scalable=no" />
+  <style>
+    html {
+      height: 100%;
+      width: 100%;
+      /* background contains one extra transparent.gif because we want trick the
+     contentful paint detection; We want to make sure the background is loaded
+     before the test starts so we always wait for the contentful paint timestamp
+     to exist, however, gradient isn't considered as contentful per spec, so Gecko
+     wouldn't generate a timestamp for it. Hence, we added a transparent gif
+     to the image list to trick the detection. */
+      background: url("/assets/www/transparent.gif"),
+        linear-gradient(135deg, red, white);
+    }
+    body {
+      height: 100%;
+      width: 100%;
+      margin: 0px;
+      padding: 0px;
+    }
+    iframe {
+      height: 100%;
+      width: 100%;
+      margin: 0px;
+      padding: 0px;
+      border: none;
+      display: block;
+    }
+  </style>
+  <iframe
+    frameborder="0"
+    srcdoc="<!DOCTYPE HTML>
+                <html>
+                <style>
+                html, body {
+                  height: 100%;
+                  width: 100%;
+                  margin: 0px;
+                  padding: 0px;
+                }
+                </style>
+                <body>
+                <div style='width: 100%; height: 100%; background-color: green;'></div>
+                <script>
+                  if (parent.document.location.search.startsWith('?event')) {
+                    document.querySelector('div').addEventListener('touchstart', e => {
+                      if (parent.document.location.search == '?event-prevent') {
+                        e.preventDefault();
+                      }
+                    });
+                  }
+                </script>
+                </body>
+                </html>"
+  >
+  </iframe>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/iframe_100_percent_height_scrollable.html b/mobile/android/geckoview/src/androidTest/assets/www/iframe_100_percent_height_scrollable.html
new file mode 100644
index 0000000000..e7517c5f12
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/iframe_100_percent_height_scrollable.html
@@ -0,0 +1,60 @@
+<!DOCTYPE html>
+<html>
+  <meta charset="utf-8" />
+  <meta name="viewport" content="width=device-width, user-scalable=no" />
+  <style>
+    html {
+      height: 100%;
+      width: 100%;
+      /* background contains one extra transparent.gif because we want trick the
+     contentful paint detection; We want to make sure the background is loaded
+     before the test starts so we always wait for the contentful paint timestamp
+     to exist, however, gradient isn't considered as contentful per spec, so Gecko
+     wouldn't generate a timestamp for it. Hence, we added a transparent gif
+     to the image list to trick the detection. */
+      background: url("/assets/www/transparent.gif"),
+        linear-gradient(135deg, red, white);
+    }
+    body {
+      height: 100%;
+      width: 100%;
+      margin: 0px;
+      padding: 0px;
+    }
+    iframe {
+      height: 100%;
+      width: 100%;
+      margin: 0px;
+      padding: 0px;
+      border: none;
+      display: block;
+    }
+  </style>
+  <iframe
+    frameborder="0"
+    srcdoc="<!DOCTYPE HTML>
+                <html>
+                <style>
+                html, body {
+                  height: 100%;
+                  width: 100%;
+                  margin: 0px;
+                  padding: 0px;
+                }
+                </style>
+                <body>
+                <div style='width: 100%; height: 500vh; background-color: green;'></div>
+                <script>
+                  if (parent.document.location.search.startsWith('?event')) {
+                    document.querySelector('div').addEventListener('touchstart', e => {
+                      if (parent.document.location.search == '?event-prevent') {
+                        e.preventDefault();
+                      }
+                    });
+                  }
+                </script>
+                </body>
+                </html>"
+  >
+  </iframe>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/iframe_98vh_no_scrollable.html b/mobile/android/geckoview/src/androidTest/assets/www/iframe_98vh_no_scrollable.html
new file mode 100644
index 0000000000..9766f41b7f
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/iframe_98vh_no_scrollable.html
@@ -0,0 +1,55 @@
+<!DOCTYPE html>
+<html>
+  <meta charset="utf-8" />
+  <meta name="viewport" content="width=device-width, user-scalable=no" />
+  <style>
+    html,
+    body {
+      margin: 0px;
+      padding: 0px;
+      /* background contains one extra transparent.gif because we want trick the
+     contentful paint detection; We want to make sure the background is loaded
+     before the test starts so we always wait for the contentful paint timestamp
+     to exist, however, gradient isn't considered as contentful per spec, so Gecko
+     wouldn't generate a timestamp for it. Hence, we added a transparent gif
+     to the image list to trick the detection. */
+      background: url("/assets/www/transparent.gif"),
+        linear-gradient(135deg, red, white);
+    }
+    iframe {
+      margin: 0px;
+      padding: 0px;
+      height: 98vh;
+      width: 100%;
+      border: none;
+      display: block;
+    }
+  </style>
+  <iframe
+    frameborder="0"
+    srcdoc="<!DOCTYPE HTML>
+                <html>
+                <style>
+                html, body {
+                  height: 100%;
+                  width: 100%;
+                  margin: 0px;
+                  padding: 0px;
+                }
+                </style>
+                <body>
+                <div style='width: 100%; height: 100%; background-color: green;'></div>
+                <script>
+                  if (parent.document.location.search.startsWith('?event')) {
+                    document.querySelector('div').addEventListener('touchstart', e => {
+                      if (parent.document.location.search == '?event-prevent') {
+                        e.preventDefault();
+                      }
+                    });
+                  }
+                </script>
+                </body>
+                </html>"
+  >
+  </iframe>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/iframe_98vh_scrollable.html b/mobile/android/geckoview/src/androidTest/assets/www/iframe_98vh_scrollable.html
new file mode 100644
index 0000000000..ca356958df
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/iframe_98vh_scrollable.html
@@ -0,0 +1,55 @@
+<!DOCTYPE html>
+<html>
+  <meta charset="utf-8" />
+  <meta name="viewport" content="width=device-width, user-scalable=no" />
+  <style>
+    html,
+    body {
+      margin: 0px;
+      padding: 0px;
+      /* background contains one extra transparent.gif because we want trick the
+     contentful paint detection; We want to make sure the background is loaded
+     before the test starts so we always wait for the contentful paint timestamp
+     to exist, however, gradient isn't considered as contentful per spec, so Gecko
+     wouldn't generate a timestamp for it. Hence, we added a transparent gif
+     to the image list to trick the detection. */
+      background: url("/assets/www/transparent.gif"),
+        linear-gradient(135deg, red, white);
+    }
+    iframe {
+      margin: 0px;
+      padding: 0px;
+      height: 98vh;
+      width: 100%;
+      border: none;
+      display: block;
+    }
+  </style>
+  <iframe
+    frameborder="0"
+    srcdoc="<!DOCTYPE HTML>
+                <html>
+                <style>
+                html, body {
+                  height: 100%;
+                  width: 100%;
+                  margin: 0px;
+                  padding: 0px;
+                }
+                </style>
+                <body>
+                <div style='width: 100%; height: 500vh; background-color: green;'></div>
+                <script>
+                  if (parent.document.location.search.startsWith('?event')) {
+                    document.querySelector('div').addEventListener('touchstart', e => {
+                      if (parent.document.location.search == '?event-prevent') {
+                        e.preventDefault();
+                      }
+                    });
+                  }
+                </script>
+                </body>
+                </html>"
+  >
+  </iframe>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/iframe_hello.html b/mobile/android/geckoview/src/androidTest/assets/www/iframe_hello.html
new file mode 100644
index 0000000000..ee4962a2b7
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/iframe_hello.html
@@ -0,0 +1,10 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <title>Hello, world!</title>
+  </head>
+  <body>
+    <p>Hello, world! From Top Level.</p>
+    <iframe src="hello.html"></iframe>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/iframe_http_only.html b/mobile/android/geckoview/src/androidTest/assets/www/iframe_http_only.html
new file mode 100644
index 0000000000..8f94d6c86d
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/iframe_http_only.html
@@ -0,0 +1,14 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+  </head>
+  <body>
+    Some stuff
+    <iframe
+      src="http://expired.example.com/"
+      width="100%"
+      height="100%"
+    ></iframe>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/iframe_redirect_automation.html b/mobile/android/geckoview/src/androidTest/assets/www/iframe_redirect_automation.html
new file mode 100644
index 0000000000..c708687a3e
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/iframe_redirect_automation.html
@@ -0,0 +1,12 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+  </head>
+  <body>
+    Some stuff
+    <iframe
+      src="https://example.org/tests/junit/simple_redirect.sjs?https://example.org"
+    ></iframe>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/iframe_redirect_local.html b/mobile/android/geckoview/src/androidTest/assets/www/iframe_redirect_local.html
new file mode 100644
index 0000000000..eb109536f0
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/iframe_redirect_local.html
@@ -0,0 +1,10 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+  </head>
+  <body>
+    Some stuff
+    <iframe src="http://jigsaw.w3.org/HTTP/300/301.html"></iframe>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/iframe_unknown_protocol.html b/mobile/android/geckoview/src/androidTest/assets/www/iframe_unknown_protocol.html
new file mode 100644
index 0000000000..81fb616b60
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/iframe_unknown_protocol.html
@@ -0,0 +1,10 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <title>Hello, world!</title>
+  </head>
+  <body>
+    <p>Hello, world! From Top Level.</p>
+    <iframe src="foo://bar"></iframe>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/images/test.gif b/mobile/android/geckoview/src/androidTest/assets/www/images/test.gif
new file mode 100644
index 0000000000..ba3b541c31
Binary files /dev/null and b/mobile/android/geckoview/src/androidTest/assets/www/images/test.gif differ
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/inputs.html b/mobile/android/geckoview/src/androidTest/assets/www/inputs.html
new file mode 100644
index 0000000000..554c6c8143
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/inputs.html
@@ -0,0 +1,66 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <title>Inputs</title>
+    <script>
+      class CustomTextBox extends HTMLElement {
+        constructor() {
+          super();
+
+          this.attachShadow({ mode: "open" });
+          const wrapper = document.createElement("span");
+          this.textbox = wrapper.appendChild(document.createElement("input"));
+          this.textbox.value = "adipisci";
+          this.shadowRoot.append(wrapper);
+        }
+
+        focus() {
+          this.textbox.focus();
+        }
+
+        select() {
+          this.textbox.select();
+        }
+
+        setSelectionRange(start, end) {
+          this.textbox.setSelectionRange(start, end);
+        }
+
+        get selectionStart() {
+          return this.textbox.selectionStart;
+        }
+
+        get selectionEnd() {
+          return this.textbox.selectionEnd;
+        }
+
+        get value() {
+          return this.textbox.value;
+        }
+      }
+      customElements.define("x-input", CustomTextBox);
+    </script>
+  </head>
+  <body>
+    <div id="text">lorem</div>
+    <input type="text" id="input" value="ipsum" />
+    <textarea id="textarea">dolor</textarea>
+    <div id="contenteditable" contenteditable="true">sit</div>
+    <iframe id="iframe" src="selectionAction_frame.html"></iframe>
+    <iframe id="designmode" src="selectionAction_frame.html"></iframe>
+    <iframe
+      id="iframe-xorigin"
+      src="http://127.0.0.1:4245/assets/www/selectionAction_frame_xorigin.html"
+    ></iframe>
+    <x-input id="x-input"></x-input>
+  </body>
+  <script>
+    addEventListener("load", function () {
+      document.getElementById("iframe").contentDocument.body.textContent =
+        "amet";
+      var designmode = document.getElementById("designmode");
+      designmode.contentDocument.body.textContent = "consectetur";
+      designmode.contentDocument.designMode = "on";
+    });
+  </script>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/links.html b/mobile/android/geckoview/src/androidTest/assets/www/links.html
new file mode 100644
index 0000000000..186426b0e2
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/links.html
@@ -0,0 +1,28 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <title>Links</title>
+    <style>
+      :link {
+        color: rgb(0, 0, 255);
+      }
+
+      :visited {
+        color: rgb(255, 0, 0);
+      }
+    </style>
+  </head>
+  <body>
+    <ul>
+      <li><a id="mozilla" href="https://mozilla.org">Mozilla</a></li>
+      <li><a id="firefox" href="https://getfirefox.com">Get Firefox!</a></li>
+      <li><a id="bugzilla" href="https://bugzilla.mozilla.org">Bugzilla</a></li>
+      <li>
+        <a id="testpilot" href="https://testpilot.firefox.com">Test Pilot</a>
+      </li>
+      <li>
+        <a id="fxa" href="https://accounts.firefox.com">Firefox Accounts</a>
+      </li>
+    </ul>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/loremIpsum.html b/mobile/android/geckoview/src/androidTest/assets/www/loremIpsum.html
new file mode 100644
index 0000000000..e772f605f0
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/loremIpsum.html
@@ -0,0 +1,17 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <title>Lorem ipsum</title>
+  </head>
+  <body>
+    <p style="font-family: monospace; width: 20ch">
+      Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod
+      tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim
+      veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea
+      commodo consequat. Duis aute irure dolor in reprehenderit in voluptate
+      velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat
+      cupidatat non proident, sunt in culpa qui officia deserunt mollit
+      <a href="#">anim id</a> est laborum.
+    </p>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/manifest.webmanifest b/mobile/android/geckoview/src/androidTest/assets/www/manifest.webmanifest
new file mode 100644
index 0000000000..5528465ba2
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/manifest.webmanifest
@@ -0,0 +1,17 @@
+{
+  "name": "App",
+  "short_name": "app",
+  "start_url": "./start/index.html",
+  "display": "standalone",
+  "background_color": "#c0ffeeee",
+  "theme_color": "cadetblue",
+  "icons": [{
+    "src": "images/test.gif",
+    "sizes": "192x192",
+    "type": "image/gif"
+  }],
+  "related_applications": [{
+    "platform": "play",
+    "url": "https://play.google.com/store/apps/details?id=my.first.webapp"
+  }]
+}
\ No newline at end of file
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/media_session_default1.html b/mobile/android/geckoview/src/androidTest/assets/www/media_session_default1.html
new file mode 100644
index 0000000000..3d6554012b
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/media_session_default1.html
@@ -0,0 +1,15 @@
+<html>
+  <head>
+    <title>MediaSessionDefaultTest1</title>
+  </head>
+  <body>
+    <script>
+      const audio1 = document.createElement("audio");
+      audio1.src = "audio/owl.mp3";
+
+      window.onload = () => {
+        audio1.play();
+      };
+    </script>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/media_session_dom1.html b/mobile/android/geckoview/src/androidTest/assets/www/media_session_dom1.html
new file mode 100644
index 0000000000..8fa9584428
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/media_session_dom1.html
@@ -0,0 +1,109 @@
+<html>
+  <head>
+    <title>MediaSessionDOMTest1</title>
+  </head>
+  <body>
+    <script>
+      function updatePositionState(event) {
+        if (event.target != active) {
+          return;
+        }
+        navigator.mediaSession.setPositionState({
+          duration: parseFloat(event.target.duration),
+          position: parseFloat(event.target.currentTime),
+          playbackRate: 1,
+        });
+      }
+
+      function updateMetadata() {
+        navigator.mediaSession.metadata = active.metadata;
+      }
+
+      function getTrack(offset) {
+        console.log("" + active.id + " " + offset);
+        const nextId = Math.min(
+          tracks.length - 1,
+          Math.max(0, parseInt(active.id) + offset)
+        );
+        return tracks[nextId];
+      }
+
+      navigator.mediaSession.setActionHandler("play", async () => {
+        updateMetadata();
+        await active.play();
+      });
+
+      navigator.mediaSession.setActionHandler("pause", () => {
+        active.pause();
+      });
+
+      navigator.mediaSession.setActionHandler("previoustrack", () => {
+        active = getTrack(-1);
+      });
+
+      navigator.mediaSession.setActionHandler("nexttrack", () => {
+        active = getTrack(1);
+      });
+
+      const audio1 = document.createElement("audio");
+      audio1.src = "audio/owl.mp3";
+      audio1.addEventListener("timeupdate", updatePositionState);
+      audio1.metadata = new window.MediaMetadata({
+        title: "hoot",
+        artist: "owl",
+        album: "hoots",
+        artwork: [
+          {
+            src: "images/test.gif",
+            type: "image/gif",
+            sizes: "265x199",
+          },
+        ],
+      });
+      audio1.id = 0;
+
+      const audio2 = document.createElement("audio");
+      audio2.src = "audio/owl.mp3";
+      audio2.addEventListener("timeupdate", updatePositionState);
+      audio2.metadata = new window.MediaMetadata({
+        title: "hoot2",
+        artist: "stillowl",
+        album: "dahoots",
+        artwork: [
+          {
+            src: "images/test.gif",
+            type: "image/gif",
+            sizes: "265x199",
+          },
+        ],
+      });
+      audio2.id = 1;
+
+      const audio3 = document.createElement("audio");
+      audio3.src = "audio/owl.mp3";
+      audio3.addEventListener("timeupdate", updatePositionState);
+      audio3.metadata = new window.MediaMetadata({
+        title: "hoot3",
+        artist: "immaowl",
+        album: "mahoots",
+        artwork: [
+          {
+            src: "images/test.gif",
+            type: "image/gif",
+            sizes: "265x199",
+          },
+        ],
+      });
+      audio3.id = 2;
+
+      const tracks = [audio1, audio2, audio3];
+      let active = audio1;
+
+      window.onload = async () => {
+        active = getTrack(0);
+        updateMetadata();
+        await active.play();
+      };
+    </script>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/metatags.html b/mobile/android/geckoview/src/androidTest/assets/www/metatags.html
new file mode 100644
index 0000000000..946c9faf27
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/metatags.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="UTF-8" />
+    <title>MetaTags</title>
+    <meta property="twitter:description" content="twitter:description" />
+    <meta property="og:description" content="og:description" />
+    <meta name="description" content="description" />
+    <meta name="unknown:tag" content="unknown:tag" />
+    <meta property="og:image" content="https://test.com/og-image.jpg" />
+    <meta
+      property="twitter:image"
+      content="https://test.com/twitter-image.jpg"
+    />
+    <meta property="og:image:url" content="https://test.com/og-image-url" />
+    <meta name="thumbnail" content="https://test.com/thumbnail.jpg" />
+  </head>
+  <body></body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/mouseToReload.html b/mobile/android/geckoview/src/androidTest/assets/www/mouseToReload.html
new file mode 100644
index 0000000000..4ef3626119
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/mouseToReload.html
@@ -0,0 +1,10 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <title>Hello, world!</title>
+    <meta name="viewport" content="initial-scale=1.0" />
+  </head>
+  <body style="height: 100%">
+    <p>Hello, world!</p>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/mp4.html b/mobile/android/geckoview/src/androidTest/assets/www/mp4.html
new file mode 100644
index 0000000000..09909fac69
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/mp4.html
@@ -0,0 +1,11 @@
+<html>
+    <head>
+        <meta charset="utf-8">
+        <title>MP4 Video</title>
+    </head>
+    <body>
+        <video controls preload>
+            <source src="videos/short.mp4"></source>
+        </video>
+    </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/newSession.html b/mobile/android/geckoview/src/androidTest/assets/www/newSession.html
new file mode 100644
index 0000000000..b92657430c
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/newSession.html
@@ -0,0 +1,22 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <title>Hello, world!</title>
+  </head>
+  <body>
+    <a
+      id="targetBlankLink"
+      target="_blank"
+      rel="opener"
+      href="newSession_child.html"
+      >target="_blank"</a
+    >
+    <a
+      id="noOpenerLink"
+      target="_blank"
+      rel="noopener"
+      href="http://example.com"
+      >rel="noopener"</a
+    >
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/newSession_child.html b/mobile/android/geckoview/src/androidTest/assets/www/newSession_child.html
new file mode 100644
index 0000000000..28fd019804
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/newSession_child.html
@@ -0,0 +1,9 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <title>Hello, world!</title>
+  </head>
+  <body>
+    <p>I'm the child</p>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/no-meta-viewport.html b/mobile/android/geckoview/src/androidTest/assets/www/no-meta-viewport.html
new file mode 100644
index 0000000000..8f1cb8fa80
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/no-meta-viewport.html
@@ -0,0 +1,5 @@
+<!DOCTYPE html>
+<html>
+  <meta charset="utf-8" />
+  <h3>Nothing here</h3>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/ogg.html b/mobile/android/geckoview/src/androidTest/assets/www/ogg.html
new file mode 100644
index 0000000000..dd478d3b3f
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/ogg.html
@@ -0,0 +1,11 @@
+<html>
+    <head>
+        <meta charset="utf-8">
+        <title>OGG Video</title>
+    </head>
+    <body>
+        <video controls preload>
+            <source src="videos/video.ogg"></source>
+        </video>
+    </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/orange.pdf b/mobile/android/geckoview/src/androidTest/assets/www/orange.pdf
new file mode 100755
index 0000000000..684582176a
Binary files /dev/null and b/mobile/android/geckoview/src/androidTest/assets/www/orange.pdf differ
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/overscroll-behavior-auto-none.html b/mobile/android/geckoview/src/androidTest/assets/www/overscroll-behavior-auto-none.html
new file mode 100644
index 0000000000..ff180f961a
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/overscroll-behavior-auto-none.html
@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<html>
+  <meta charset="utf-8" />
+  <meta name="viewport" content="width=device-width, user-scalable=no" />
+  <style>
+    html {
+      height: 100%;
+      width: 100%;
+      /* background contains one extra transparent.gif because we want trick the
+     contentful paint detection; We want to make sure the background is loaded
+     before the test starts so we always wait for the contentful paint timestamp
+     to exist, however, gradient isn't considered as contentful per spec, so Gecko
+     wouldn't generate a timestamp for it. Hence, we added a transparent gif
+     to the image list to trick the detection. */
+      background: url("/assets/www/transparent.gif"),
+        linear-gradient(135deg, red, white);
+      overscroll-behavior: auto none;
+    }
+    body {
+      width: 100%;
+      margin: 0px;
+      padding: 0px;
+    }
+  </style>
+  <body>
+    <div style="width: 100%; height: 100vh"></div>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/overscroll-behavior-auto.html b/mobile/android/geckoview/src/androidTest/assets/www/overscroll-behavior-auto.html
new file mode 100644
index 0000000000..6f2b3ee92a
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/overscroll-behavior-auto.html
@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<html>
+  <meta charset="utf-8" />
+  <meta name="viewport" content="width=device-width, user-scalable=no" />
+  <style>
+    html {
+      height: 100%;
+      width: 100%;
+      /* background contains one extra transparent.gif because we want trick the
+     contentful paint detection; We want to make sure the background is loaded
+     before the test starts so we always wait for the contentful paint timestamp
+     to exist, however, gradient isn't considered as contentful per spec, so Gecko
+     wouldn't generate a timestamp for it. Hence, we added a transparent gif
+     to the image list to trick the detection. */
+      background: url("/assets/www/transparent.gif"),
+        linear-gradient(135deg, red, white);
+      overscroll-behavior: auto;
+    }
+    body {
+      width: 100%;
+      margin: 0px;
+      padding: 0px;
+    }
+  </style>
+  <body>
+    <div style="width: 100%; height: 100vh"></div>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/overscroll-behavior-none-auto.html b/mobile/android/geckoview/src/androidTest/assets/www/overscroll-behavior-none-auto.html
new file mode 100644
index 0000000000..ff6366ccda
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/overscroll-behavior-none-auto.html
@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<html>
+  <meta charset="utf-8" />
+  <meta name="viewport" content="width=device-width, user-scalable=no" />
+  <style>
+    html {
+      height: 100%;
+      width: 100%;
+      /* background contains one extra transparent.gif because we want trick the
+     contentful paint detection; We want to make sure the background is loaded
+     before the test starts so we always wait for the contentful paint timestamp
+     to exist, however, gradient isn't considered as contentful per spec, so Gecko
+     wouldn't generate a timestamp for it. Hence, we added a transparent gif
+     to the image list to trick the detection. */
+      background: url("/assets/www/transparent.gif"),
+        linear-gradient(135deg, red, white);
+      overscroll-behavior: none auto;
+    }
+    body {
+      width: 100%;
+      margin: 0px;
+      padding: 0px;
+    }
+  </style>
+  <body>
+    <div style="width: 100%; height: 100vh"></div>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/overscroll-behavior-none-on-non-root.html b/mobile/android/geckoview/src/androidTest/assets/www/overscroll-behavior-none-on-non-root.html
new file mode 100644
index 0000000000..fbe2269c19
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/overscroll-behavior-none-on-non-root.html
@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<html>
+  <meta charset="utf-8" />
+  <meta name="viewport" content="width=device-width, user-scalable=no" />
+  <style>
+    html {
+      height: 100%;
+      width: 100%;
+      /* background contains one extra transparent.gif because we want trick the
+     contentful paint detection; We want to make sure the background is loaded
+     before the test starts so we always wait for the contentful paint timestamp
+     to exist, however, gradient isn't considered as contentful per spec, so Gecko
+     wouldn't generate a timestamp for it. Hence, we added a transparent gif
+     to the image list to trick the detection. */
+      background: url("/assets/www/transparent.gif"),
+        linear-gradient(135deg, red, white);
+    }
+    body {
+      width: 100%;
+      margin: 0px;
+      padding: 0px;
+    }
+  </style>
+  <body>
+    <div
+      id="scroll"
+      style="
+        width: 100%;
+        height: 100vh;
+        overscroll-behavior: none;
+        overflow-y: scroll;
+      "
+    >
+      <div style="height: 200vh"></div>
+    </div>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/popup.html b/mobile/android/geckoview/src/androidTest/assets/www/popup.html
new file mode 100644
index 0000000000..7e52870df5
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/popup.html
@@ -0,0 +1,12 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <title>Hello, world!</title>
+  </head>
+  <body>
+    <p>Launching popup...</p>
+    <script>
+      window.open("hello.html");
+    </script>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/print_content_change.html b/mobile/android/geckoview/src/androidTest/assets/www/print_content_change.html
new file mode 100644
index 0000000000..ae36a6c6b8
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/print_content_change.html
@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8" content="width=device-width, height=device-height" />
+    <title>Orange Print Background Removal</title>
+  </head>
+  <style>
+    .box {
+      height: 200vh;
+      width: 100vw;
+    }
+    @media screen {
+      .background {
+        background-color: rgb(0, 0, 255);
+        color-adjust: exact;
+      }
+    }
+    @media print {
+      .background {
+        background-color: rgb(255, 113, 57);
+        color-adjust: exact;
+      }
+    }
+  </style>
+
+  <body>
+    <div id="content" class="box background"></div>
+  </body>
+
+  <!-- The window.print should freeze the page before removing the content, so the background should remain present. -->
+  <button
+    id="print-button"
+    onclick="window.print(); document.getElementById('content').remove()"
+  >
+    Print
+  </button>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/print_iframe.html b/mobile/android/geckoview/src/androidTest/assets/www/print_iframe.html
new file mode 100644
index 0000000000..b7dd83f2a5
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/print_iframe.html
@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8" content="width=device-width, height=device-height" />
+    <title>Print iframes</title>
+  </head>
+  <style>
+    .box {
+      height: 200vh;
+      width: 100vw;
+    }
+    @media screen {
+      .background {
+        background-color: rgb(255, 0, 0);
+        color-adjust: exact;
+      }
+    }
+    @media print {
+      .background {
+        background-color: rgb(0, 255, 0);
+        color-adjust: exact;
+      }
+    }
+  </style>
+
+  <body>
+    <div id="content" class="box background"></div>
+  </body>
+
+  <!-- The window.print should freeze the page before removing the content, so the background should remain present. -->
+  <button
+    id="print-button-page"
+    onclick="window.print(); document.getElementById('content').remove()"
+  >
+    Print
+  </button>
+
+  <iframe id="iframe" src="print_content_change.html"></iframe>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/prompts.html b/mobile/android/geckoview/src/androidTest/assets/www/prompts.html
new file mode 100644
index 0000000000..53e8f96b04
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/prompts.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8" />
+  </head>
+  <body>
+    <select id="selectexample">
+      <option>1</option>
+      <option>2</option>
+    </select>
+
+    <input type="date" id="dateexample" />
+
+    <input type="month" id="monthexample" />
+
+    <input type="week" id="weekexample" />
+
+    <input type="time" id="timeexample" />
+
+    <input type="datetime-local" id="datetimelocalexample" />
+
+    <input type="color" id="colorexample" value="#ffffff" />
+
+    <input type="file" id="fileexample" accept="image/*,.pdf" capture="user" />
+
+    <datalist id="colorlist">
+      <option>#000000</option>
+      <option>#808080</option>
+    </datalist>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/pull-to-refresh-subframe.html b/mobile/android/geckoview/src/androidTest/assets/www/pull-to-refresh-subframe.html
new file mode 100644
index 0000000000..d1a421c0a3
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/pull-to-refresh-subframe.html
@@ -0,0 +1,82 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <meta
+      name="viewport"
+      content="height=device-height,width=device-width,initial-scale=1.0"
+    />
+    <style type="text/css">
+      html,
+      body {
+        width: 100%;
+        height: 100%;
+        margin: 0;
+        padding: 0;
+        /* background contains one extra transparent.gif because we want trick the
+           contentful paint detection; We want to make sure the background is loaded
+           before the test starts so we always wait for the contentful paint timestamp
+           to exist, however, gradient isn't considered as contentful per spec, so Gecko
+           wouldn't generate a timestamp for it. Hence, we added a transparent gif
+           to the image list to trick the detection. */
+        background: url("/assets/www/transparent.gif"),
+          linear-gradient(135deg, red, white);
+      }
+
+      .container {
+        width: 100%;
+        height: 25%;
+        overflow: scroll;
+      }
+
+      .subframe {
+        width: 100%;
+        height: 100vh;
+      }
+
+      #one > .subframe {
+        background-color: red;
+      }
+
+      #two > .subframe {
+        background-color: green;
+      }
+
+      #three > .subframe {
+        background-color: blue;
+      }
+
+      #four > .subframe {
+        background-color: yellow;
+      }
+    </style>
+  </head>
+  <body>
+    <div id="one" class="container">
+      <div class="subframe"></div>
+    </div>
+    <div id="two" class="container">
+      <div class="subframe"></div>
+    </div>
+    <div id="three" class="container">
+      <div class="subframe"></div>
+    </div>
+    <div id="four" class="container">
+      <div class="subframe"></div>
+    </div>
+  </body>
+  <script>
+    document
+      .getElementById("three")
+      .scrollTo({ top: 200, behavior: "instant" });
+
+    document.getElementById("four").addEventListener("touchstart", e => {
+      console.log("not preventing default");
+    });
+
+    document.getElementById("two").addEventListener("touchstart", e => {
+      console.log("preventing default");
+      e.preventDefault();
+    });
+  </script>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/push/push.html b/mobile/android/geckoview/src/androidTest/assets/www/push/push.html
new file mode 100644
index 0000000000..ccd091eaea
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/push/push.html
@@ -0,0 +1,10 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <title>Push API test</title>
+  </head>
+  <body>
+    <p>Hello, world!</p>
+    <script src="push.js"></script>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/push/push.js b/mobile/android/geckoview/src/androidTest/assets/www/push/push.js
new file mode 100644
index 0000000000..d9322d11cc
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/push/push.js
@@ -0,0 +1,44 @@
+window.doSubscribe = async function (applicationServerKey) {
+  const registration = await navigator.serviceWorker.register("./sw.js");
+  const sub = await registration.pushManager.subscribe({
+    applicationServerKey,
+  });
+  return sub.toJSON();
+};
+
+window.doGetSubscription = async function () {
+  const registration = await navigator.serviceWorker.register("./sw.js");
+  const sub = await registration.pushManager.getSubscription();
+  if (sub) {
+    return sub.toJSON();
+  }
+
+  return null;
+};
+
+window.doUnsubscribe = async function () {
+  const registration = await navigator.serviceWorker.register("./sw.js");
+  const sub = await registration.pushManager.getSubscription();
+  sub.unsubscribe();
+  return {};
+};
+
+window.doWaitForPushEvent = function () {
+  return new Promise(resolve => {
+    navigator.serviceWorker.addEventListener("message", function (e) {
+      if (e.data.type === "push") {
+        resolve(e.data.payload);
+      }
+    });
+  });
+};
+
+window.doWaitForSubscriptionChange = function () {
+  return new Promise(resolve => {
+    navigator.serviceWorker.addEventListener("message", function (e) {
+      if (e.data.type === "pushsubscriptionchange") {
+        resolve(e.data.type);
+      }
+    });
+  });
+};
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/push/sw.js b/mobile/android/geckoview/src/androidTest/assets/www/push/sw.js
new file mode 100644
index 0000000000..2e51383205
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/push/sw.js
@@ -0,0 +1,30 @@
+self.addEventListener("install", function () {
+  self.skipWaiting();
+});
+
+self.addEventListener("activate", function (e) {
+  e.waitUntil(self.clients.claim());
+});
+
+self.addEventListener("push", async function (e) {
+  const clients = await self.clients.matchAll();
+  let text = "";
+  if (e.data) {
+    text = e.data.text();
+  }
+  clients.forEach(function (client) {
+    client.postMessage({ type: "push", payload: text });
+  });
+
+  try {
+    const { title, body } = e.data.json();
+    self.registration.showNotification(title, { body });
+  } catch (e) {}
+});
+
+self.addEventListener("pushsubscriptionchange", async function (e) {
+  const clients = await self.clients.matchAll();
+  clients.forEach(function (client) {
+    client.postMessage({ type: "pushsubscriptionchange" });
+  });
+});
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/red-background-body-fully-covered-by-green-element.html b/mobile/android/geckoview/src/androidTest/assets/www/red-background-body-fully-covered-by-green-element.html
new file mode 100644
index 0000000000..ad6c96599e
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/red-background-body-fully-covered-by-green-element.html
@@ -0,0 +1,23 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta http-equiv="content-type" content="text/html; charset=windows-1252" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <style>
+      html {
+        scrollbar-width: none;
+      }
+      body {
+        background: red;
+        margin: 0;
+      }
+      .tall {
+        height: 600vh;
+        background: green;
+      }
+    </style>
+  </head>
+  <body>
+    <div class="tall"></div>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/reflect_local_storage_into_title.html b/mobile/android/geckoview/src/androidTest/assets/www/reflect_local_storage_into_title.html
new file mode 100644
index 0000000000..749678c668
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/reflect_local_storage_into_title.html
@@ -0,0 +1,17 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <title>no title</title>
+    <script>
+      // If we have a query string, save it to the local storage.
+      if (window.location.search.length) {
+        const value = window.location.search.substr(1);
+        localStorage.setItem("ctx", value);
+      }
+
+      // Set the title to reflect the local storage value.
+      document.title = "storage=" + localStorage.getItem("ctx");
+    </script>
+  </head>
+  <body></body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/resubmit.html b/mobile/android/geckoview/src/androidTest/assets/www/resubmit.html
new file mode 100644
index 0000000000..6155270f1b
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/resubmit.html
@@ -0,0 +1,12 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8" />
+  </head>
+  <body>
+    <form action="hello.html" method="post">
+      <input id="text" />
+      <button id="submit">Submit</button>
+    </form>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/root_100_percent_height.html b/mobile/android/geckoview/src/androidTest/assets/www/root_100_percent_height.html
new file mode 100644
index 0000000000..e91c997bbb
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/root_100_percent_height.html
@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<html>
+  <meta charset="utf-8" />
+  <meta name="viewport" content="width=device-width, user-scalable=no" />
+  <style>
+    html {
+      height: 100%;
+      width: 100%;
+      /* background contains one extra transparent.gif because we want trick the
+     contentful paint detection; We want to make sure the background is loaded
+     before the test starts so we always wait for the contentful paint timestamp
+     to exist, however, gradient isn't considered as contentful per spec, so Gecko
+     wouldn't generate a timestamp for it. Hence, we added a transparent gif
+     to the image list to trick the detection. */
+      background: url("/assets/www/transparent.gif"),
+        linear-gradient(135deg, red, white);
+    }
+    body {
+      height: 100%;
+      width: 100%;
+      margin: 0px;
+      padding: 0px;
+    }
+  </style>
+  <body>
+    <div style="width: 100%; height: 100%; background-color: green"></div>
+    <script>
+      if (document.location.search.startsWith("?event")) {
+        document.querySelector("div").addEventListener("touchstart", e => {
+          if (document.location.search == "?event-prevent") {
+            e.preventDefault();
+          }
+        });
+      }
+    </script>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/root_100vh.html b/mobile/android/geckoview/src/androidTest/assets/www/root_100vh.html
new file mode 100644
index 0000000000..e6c7fef374
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/root_100vh.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<html>
+  <meta charset="utf-8" />
+  <meta name="viewport" content="width=device-width, user-scalable=no" />
+  <style>
+    html {
+      height: 100%;
+      width: 100%;
+      /* background contains one extra transparent.gif because we want trick the
+     contentful paint detection; We want to make sure the background is loaded
+     before the test starts so we always wait for the contentful paint timestamp
+     to exist, however, gradient isn't considered as contentful per spec, so Gecko
+     wouldn't generate a timestamp for it. Hence, we added a transparent gif
+     to the image list to trick the detection. */
+      background: url("/assets/www/transparent.gif"),
+        linear-gradient(135deg, red, white);
+    }
+    body {
+      width: 100%;
+      margin: 0px;
+      padding: 0px;
+    }
+  </style>
+  <body>
+    <div style="width: 100%; height: 100vh; background-color: green"></div>
+    <script>
+      if (document.location.search.startsWith("?event")) {
+        document.querySelector("div").addEventListener("touchstart", e => {
+          if (document.location.search == "?event-prevent") {
+            e.preventDefault();
+          }
+        });
+      }
+    </script>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/root_98vh.html b/mobile/android/geckoview/src/androidTest/assets/www/root_98vh.html
new file mode 100644
index 0000000000..a654353d64
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/root_98vh.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<html>
+  <meta charset="utf-8" />
+  <meta name="viewport" content="width=device-width, user-scalable=no" />
+  <style>
+    html {
+      height: 100%;
+      width: 100%;
+      /* background contains one extra transparent.gif because we want trick the
+     contentful paint detection; We want to make sure the background is loaded
+     before the test starts so we always wait for the contentful paint timestamp
+     to exist, however, gradient isn't considered as contentful per spec, so Gecko
+     wouldn't generate a timestamp for it. Hence, we added a transparent gif
+     to the image list to trick the detection. */
+      background: url("/assets/www/transparent.gif"),
+        linear-gradient(135deg, red, white);
+    }
+    body {
+      width: 100%;
+      margin: 0px;
+      padding: 0px;
+    }
+  </style>
+  <body>
+    <div style="width: 100%; height: 98vh; background-color: green"></div>
+    <script>
+      if (document.location.search.startsWith("?event")) {
+        document.querySelector("div").addEventListener("touchstart", e => {
+          if (document.location.search == "?event-prevent") {
+            e.preventDefault();
+          }
+        });
+      }
+    </script>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/saveState.html b/mobile/android/geckoview/src/androidTest/assets/www/saveState.html
new file mode 100644
index 0000000000..c85b528f01
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/saveState.html
@@ -0,0 +1,18 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <title>Hello, world!</title>
+    <meta name="viewport" content="width=device-width,initial-scale=1" />
+    <style>
+      p {
+        height: 300vh;
+      }
+    </style>
+  </head>
+  <body>
+    <form id="form">
+      <input type="text" id="name" />
+    </form>
+    <p>Hello, world!</p>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/scroll-handoff.html b/mobile/android/geckoview/src/androidTest/assets/www/scroll-handoff.html
new file mode 100644
index 0000000000..c8f0fe9e95
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/scroll-handoff.html
@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<html>
+  <meta charset="utf-8" />
+  <meta name="viewport" content="width=device-width, user-scalable=no" />
+  <style>
+    html {
+      height: 100%;
+      width: 100%;
+      /* background contains one extra transparent.gif because we want trick the
+     contentful paint detection; We want to make sure the background is loaded
+     before the test starts so we always wait for the contentful paint timestamp
+     to exist, however, gradient isn't considered as contentful per spec, so Gecko
+     wouldn't generate a timestamp for it. Hence, we added a transparent gif
+     to the image list to trick the detection. */
+      background: url("/assets/www/transparent.gif"),
+        linear-gradient(135deg, red, white);
+      overscroll-behavior: auto;
+    }
+    body {
+      width: 100%;
+      margin: 0px;
+      padding: 0px;
+    }
+    #scroll {
+      /* set a different overscroll-behavior to make this container different from
+     the root scrollElement. */
+      overscroll-behavior: contain auto;
+    }
+  </style>
+  <body>
+    <div id="scroll" style="width: 100%; height: 100vh; overflow-y: scroll">
+      <div style="height: 300vh"></div>
+    </div>
+  </body>
+  <script>
+    document
+      .getElementById("scroll")
+      .scrollTo({ top: 50, behavior: "instant" });
+  </script>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/scroll.html b/mobile/android/geckoview/src/androidTest/assets/www/scroll.html
new file mode 100644
index 0000000000..e906e45686
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/scroll.html
@@ -0,0 +1,59 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=0.5" />
+    <style type="text/css">
+      body {
+        margin: 0;
+        /* background contains one extra transparent.gif because we want trick the
+      contentful paint detection; We want to make sure the background is loaded
+      before the test starts so we always wait for the contentful paint timestamp
+      to exist, however, gradient isn't considered as contentful per spec, so Gecko
+      wouldn't generate a timestamp for it. Hence, we added a transparent gif
+      to the image list to trick the detection. */
+        background: url("/assets/www/transparent.gif"),
+          linear-gradient(135deg, red, white);
+      }
+
+      #one {
+        background-color: red;
+        width: 200vw;
+        height: 33vh;
+      }
+
+      #two {
+        background-color: green;
+        width: 200vw;
+        height: 33vh;
+      }
+
+      #three {
+        background-color: blue;
+        width: 200vw;
+        height: 33vh;
+      }
+
+      #four {
+        background-color: purple;
+        width: 200vw;
+        height: 200vh;
+      }
+    </style>
+  </head>
+  <body>
+    <div id="one"></div>
+    <div id="two"></div>
+    <div id="three"></div>
+    <div id="four"></div>
+    <script>
+      document.getElementById("two").addEventListener("touchstart", e => {
+        console.log("preventing default");
+        e.preventDefault();
+      });
+
+      document.getElementById("three").addEventListener("touchstart", e => {
+        console.log("not preventing default");
+      });
+    </script>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/select-listbox.html b/mobile/android/geckoview/src/androidTest/assets/www/select-listbox.html
new file mode 100644
index 0000000000..5832954d2e
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/select-listbox.html
@@ -0,0 +1,7 @@
+<!DOCTYPE html>
+<meta name="viewport" content="width=device-width, initial-scale=1.0" />
+<select size="2" id="multiple">
+  <option>ABC</option>
+  <option>DEF</option>
+  <option>GHI</option>
+</select>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/select-multiple.html b/mobile/android/geckoview/src/androidTest/assets/www/select-multiple.html
new file mode 100644
index 0000000000..bb9470fffd
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/select-multiple.html
@@ -0,0 +1,7 @@
+<!DOCTYPE html>
+<meta name="viewport" content="width=device-width, initial-scale=1.0" />
+<select multiple id="multiple">
+  <option>ABC</option>
+  <option>DEF</option>
+  <option>GHI</option>
+</select>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/select.html b/mobile/android/geckoview/src/androidTest/assets/www/select.html
new file mode 100644
index 0000000000..e8d28253d2
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/select.html
@@ -0,0 +1,6 @@
+<!DOCTYPE html>
+<meta name="viewport" content="width=device-width, initial-scale=1.0" />
+<select id="simple">
+  <option>ABC</option>
+  <option>DEF</option>
+</select>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/selectionAction_frame.html b/mobile/android/geckoview/src/androidTest/assets/www/selectionAction_frame.html
new file mode 100644
index 0000000000..132155c6a1
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/selectionAction_frame.html
@@ -0,0 +1,6 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+  </head>
+  <body></body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/selectionAction_frame_xorigin.html b/mobile/android/geckoview/src/androidTest/assets/www/selectionAction_frame_xorigin.html
new file mode 100644
index 0000000000..87a4d6039e
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/selectionAction_frame_xorigin.html
@@ -0,0 +1,47 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <script>
+      window.addEventListener("message", e => {
+        switch (e.data.type) {
+          case "focus":
+            window.focus();
+            break;
+
+          case "select": {
+            <!-- On fission, there's no way to wait for parent position change. -->
+            <!-- So we use requestAnimationFrame as a workaround. -->
+            window.requestAnimationFrame(() => {
+              window.requestAnimationFrame(() => {
+                const text = document.body.firstChild;
+                document
+                  .getSelection()
+                  .setBaseAndExtent(text, 0, text, e.data.length);
+              });
+            });
+            break;
+          }
+
+          case "selectedOffset": {
+            const sel = document.getSelection();
+            const text = document.body.firstChild;
+            if (sel.anchorNode !== text || sel.focusNode !== text) {
+              window.parent.postMessage([-1, -1], "*");
+            } else {
+              window.parent.postMessage(
+                [sel.anchorOffset, sel.focusOffset],
+                "*"
+              );
+            }
+            break;
+          }
+
+          case "content":
+            window.parent.postMessage(document.body.textContent, "*");
+            break;
+        }
+      });
+    </script>
+  </head>
+  <body onload="document.body.textContent = 'elit'"></body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/showDynamicToolbar.html b/mobile/android/geckoview/src/androidTest/assets/www/showDynamicToolbar.html
new file mode 100644
index 0000000000..f6b0dd340c
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/showDynamicToolbar.html
@@ -0,0 +1,96 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <title>showDynamicToolbar test content</title>
+    <script>
+      document.addEventListener("click", function () {
+        document.body.style.position = "fixed";
+      });
+    </script>
+  </head>
+  <body>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+    <p>Paragraph</p>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/simple_redirect.sjs b/mobile/android/geckoview/src/androidTest/assets/www/simple_redirect.sjs
new file mode 100644
index 0000000000..43fec90b5a
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/simple_redirect.sjs
@@ -0,0 +1,4 @@
+function handleRequest(request, response) {
+  response.setStatusLine(request.httpVersion, 301, "Moved Permanently");
+  response.setHeader("Location", request.queryString, false);
+}
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/titleChange.html b/mobile/android/geckoview/src/androidTest/assets/www/titleChange.html
new file mode 100644
index 0000000000..51f8c936b6
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/titleChange.html
@@ -0,0 +1,16 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+  </head>
+  <header><title>Title1</title></header>
+  <body>
+    <script>
+      addEventListener("load", function () {
+        setTimeout(function () {
+          document.title = "Title2";
+        }, 100);
+      });
+    </script>
+  </body>
+  <iframe src="hello.html"></iframe>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/touch-action-wheel-listener.html b/mobile/android/geckoview/src/androidTest/assets/www/touch-action-wheel-listener.html
new file mode 100644
index 0000000000..cfc9489d17
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/touch-action-wheel-listener.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<html>
+  <meta charset="utf-8" />
+  <meta name="viewport" content="width=device-width, user-scalable=no" />
+  <style>
+    html {
+      height: 100%;
+      width: 100%;
+      /* background contains one extra transparent.gif because we want trick the
+     contentful paint detection; We want to make sure the background is loaded
+     before the test starts so we always wait for the contentful paint timestamp
+     to exist, however, gradient isn't considered as contentful per spec, so Gecko
+     wouldn't generate a timestamp for it. Hence, we added a transparent gif
+     to the image list to trick the detection. */
+      background: url("/assets/www/transparent.gif"),
+        linear-gradient(135deg, red, white);
+    }
+    body {
+      width: 100%;
+      margin: 0px;
+      padding: 0px;
+    }
+  </style>
+  <body>
+    <div id="one" style="width: 100%; height: 100vh; touch-action: none"></div>
+    <script>
+      document.getElementById("one").addEventListener("wheel", e => {
+        console.log("preventing default");
+        e.preventDefault();
+      });
+    </script>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/touch-action.html b/mobile/android/geckoview/src/androidTest/assets/www/touch-action.html
new file mode 100644
index 0000000000..62266b6ef7
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/touch-action.html
@@ -0,0 +1,48 @@
+<!DOCTYPE html>
+<html>
+  <meta charset="utf-8" />
+  <meta name="viewport" content="width=device-width, user-scalable=no" />
+  <style>
+    html {
+      height: 100%;
+      width: 100%;
+      /* background contains one extra transparent.gif because we want trick the
+     contentful paint detection; We want to make sure the background is loaded
+     before the test starts so we always wait for the contentful paint timestamp
+     to exist, however, gradient isn't considered as contentful per spec, so Gecko
+     wouldn't generate a timestamp for it. Hence, we added a transparent gif
+     to the image list to trick the detection. */
+      background: url("/assets/www/transparent.gif"),
+        linear-gradient(135deg, red, white);
+    }
+    body {
+      width: 100%;
+      margin: 0px;
+      padding: 0px;
+    }
+  </style>
+  <body>
+    <div style="width: 100%; height: 50vh; touch-action: auto"></div>
+    <script>
+      const searchParams = new URLSearchParams(location.search);
+      let div = document.querySelector("div");
+      if (searchParams.has("subframe")) {
+        const scrolledContents = document.createElement("div");
+        scrolledContents.style.height = "100%";
+
+        div.appendChild(scrolledContents);
+        div.style.overflow = "auto";
+
+        div = scrolledContents;
+      }
+      if (searchParams.has("scrollable")) {
+        // Scrollable for dynamic toolbar purposes.
+        div.style.height = "100vh";
+      }
+      div.style.touchAction = searchParams.get("touch-action");
+      if (searchParams.has("event")) {
+        div.addEventListener("touchstart", e => {});
+      }
+    </script>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/touch.html b/mobile/android/geckoview/src/androidTest/assets/www/touch.html
new file mode 100644
index 0000000000..ba3bc098a9
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/touch.html
@@ -0,0 +1,58 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <meta
+      name="viewport"
+      content="height=device-height,width=device-width,initial-scale=1.0"
+    />
+    <style type="text/css">
+      body {
+        width: 100%;
+        height: 100%;
+        margin: 0;
+        padding: 0px;
+        /* background contains one extra transparent.gif because we want trick the
+      contentful paint detection; We want to make sure the background is loaded
+      before the test starts so we always wait for the contentful paint timestamp
+      to exist, however, gradient isn't considered as contentful per spec, so Gecko
+      wouldn't generate a timestamp for it. Hence, we added a transparent gif
+      to the image list to trick the detection. */
+        background: url("/assets/www/transparent.gif"),
+          linear-gradient(135deg, red, white);
+      }
+
+      #one {
+        background-color: red;
+        width: 100%;
+        height: 33%;
+      }
+
+      #two {
+        background-color: green;
+        width: 100%;
+        height: 33%;
+      }
+
+      #three {
+        background-color: blue;
+        width: 100%;
+        height: 33%;
+      }
+    </style>
+  </head>
+  <body>
+    <div id="one"></div>
+    <div id="two"></div>
+    <div id="three"></div>
+    <script>
+      document.getElementById("two").addEventListener("touchstart", e => {
+        console.log("preventing default");
+        e.preventDefault();
+      });
+
+      document.getElementById("three").addEventListener("touchstart", e => {
+        console.log("not preventing default");
+      });
+    </script>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/touch_xorigin.html b/mobile/android/geckoview/src/androidTest/assets/www/touch_xorigin.html
new file mode 100644
index 0000000000..89f3762aef
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/touch_xorigin.html
@@ -0,0 +1,16 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <style>
+      body,
+      html {
+        margin: 0;
+        padding: 0;
+      }
+    </style>
+  </head>
+  <body>
+    <iframe src="http://127.0.0.1:4245/assets/www/touch.html"></iframe>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/touchstart.html b/mobile/android/geckoview/src/androidTest/assets/www/touchstart.html
new file mode 100644
index 0000000000..9ee1f461a7
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/touchstart.html
@@ -0,0 +1,37 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=0.5" />
+    <style type="text/css">
+      body {
+        margin: 0;
+        /* background contains one extra transparent.gif because we want trick the
+      contentful paint detection; We want to make sure the background is loaded
+      before the test starts so we always wait for the contentful paint timestamp
+      to exist, however, gradient isn't considered as contentful per spec, so Gecko
+      wouldn't generate a timestamp for it. Hence, we added a transparent gif
+      to the image list to trick the detection. */
+        background: url("/assets/www/transparent.gif"),
+          linear-gradient(135deg, red, white);
+      }
+
+      #one {
+        background-color: red;
+        width: 200%;
+        height: 100vh;
+      }
+      #two {
+        background-color: blue;
+        width: 200%;
+        height: 800vh;
+      }
+    </style>
+  </head>
+  <body>
+    <div id="one"></div>
+    <div id="two"></div>
+    <script>
+      document.getElementById("two").addEventListener("touchstart", e => {});
+    </script>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/tracemonkey.pdf b/mobile/android/geckoview/src/androidTest/assets/www/tracemonkey.pdf
new file mode 100644
index 0000000000..4dcf129d65
Binary files /dev/null and b/mobile/android/geckoview/src/androidTest/assets/www/tracemonkey.pdf differ
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/trackers.html b/mobile/android/geckoview/src/androidTest/assets/www/trackers.html
new file mode 100644
index 0000000000..56ea43979a
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/trackers.html
@@ -0,0 +1,14 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <title>Trackers</title>
+  </head>
+  <body>
+    <p>Trackers</p>
+
+    <!-- test-track-simple -->
+    <script src="http://trackertest.org/tracker.js"></script>
+    <script src="https://tracking.example.com/tracker.js"></script>
+    <script src="https://itisatracker.org/tracker.js"></script>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/translations-tester-en.html b/mobile/android/geckoview/src/androidTest/assets/www/translations-tester-en.html
new file mode 100644
index 0000000000..3e5f8e6303
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/translations-tester-en.html
@@ -0,0 +1,62 @@
+<!DOCTYPE html>
+<html lang="en">
+  <!-- See toolkit for original test.-->
+  <head>
+    <meta charset="utf-8" />
+    <title>Translations Test</title>
+    <style>
+      div {
+        margin: 10px auto;
+        width: 300px;
+      }
+      p {
+        margin: 47px 0;
+        font-size: 21px;
+        line-height: 2;
+      }
+    </style>
+  </head>
+  <body>
+    <div>
+      <!-- The following is an excerpt from The Wondeful Wizard of Oz, which is in the public domain -->
+      <h1>"The Wonderful Wizard of Oz" by L. Frank Baum</h1>
+      <p>
+        The little girl, seeing she had lost one of her pretty shoes, grew
+        angry, and said to the Witch, “Give me back my shoe!”
+      </p>
+      <p>
+        “I will not,” retorted the Witch, “for it is now my shoe, and not
+        yours.”
+      </p>
+      <p>
+        “You are a wicked creature!” cried Dorothy. “You have no right to take
+        my shoe from me.”
+      </p>
+      <p>
+        “I shall keep it, just the same,” said the Witch, laughing at her, “and
+        someday I shall get the other one from you, too.”
+      </p>
+      <p>
+        This made Dorothy so very angry that she picked up the bucket of water
+        that stood near and dashed it over the Witch, wetting her from head to
+        foot.
+      </p>
+      <p>
+        Instantly the wicked woman gave a loud cry of fear, and then, as Dorothy
+        looked at her in wonder, the Witch began to shrink and fall away.
+      </p>
+      <p>
+        “See what you have done!” she screamed. “In a minute I shall melt away.”
+      </p>
+      <p>
+        “I’m very sorry, indeed,” said Dorothy, who was truly frightened to see
+        the Witch actually melting away like brown sugar before her very eyes.
+      </p>
+      <p>
+        “Didn’t you know water would be the end of me?” asked the Witch, in a
+        wailing, despairing voice.
+      </p>
+      <p>“Of course not,” answered Dorothy. “How should I?”</p>
+    </div>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/translations-tester-es.html b/mobile/android/geckoview/src/androidTest/assets/www/translations-tester-es.html
new file mode 100644
index 0000000000..e9d39585ee
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/translations-tester-es.html
@@ -0,0 +1,83 @@
+<!DOCTYPE html>
+<html lang="es">
+  <!-- See toolkit for original test.-->
+  <head>
+    <meta charset="utf-8" />
+    <title>Translations Test</title>
+    <style>
+      div {
+        margin: 10px auto;
+        width: 300px;
+      }
+      p {
+        margin: 47px 0;
+        font-size: 21px;
+        line-height: 2;
+      }
+    </style>
+  </head>
+  <body>
+    <div>
+      <header lang="en">
+        The following is an excerpt from Don Quijote de la Mancha, which is in
+        the public domain
+      </header>
+      <h1>Don Quijote de La Mancha</h1>
+      <h2>Capítulo VIII.</h2>
+      <p>
+        Del buen suceso que el valeroso don Quijote tuvo en la espantable y
+        jamás imaginada aventura de los molinos de viento, con otros sucesos
+        dignos de felice recordación
+      </p>
+      <p>
+        En esto, descubrieron treinta o cuarenta molinos de viento que hay en
+        aquel campo; y, así como don Quijote los vio, dijo a su escudero:
+      </p>
+      <p>
+        — La ventura va guiando nuestras cosas mejor de lo que acertáramos a
+        desear, porque ves allí, amigo Sancho Panza, donde se descubren treinta,
+        o pocos más, desaforados gigantes, con quien pienso hacer batalla y
+        quitarles a todos las vidas, con cuyos despojos comenzaremos a
+        enriquecer; que ésta es buena guerra, y es gran servicio de Dios quitar
+        tan mala simiente de sobre la faz de la tierra.
+      </p>
+      <p>— ¿Qué gigantes? —dijo Sancho Panza.</p>
+      <p>
+        — Aquellos que allí ves —respondió su amo— de los brazos largos, que los
+        suelen tener algunos de casi dos leguas.
+      </p>
+      <p>
+        — Mire vuestra merced —respondió Sancho— que aquellos que allí se
+        parecen no son gigantes, sino molinos de viento, y lo que en ellos
+        parecen brazos son las aspas, que, volteadas del viento, hacen andar la
+        piedra del molino.
+      </p>
+      <p>
+        — Bien parece —respondió don Quijote— que no estás cursado en esto de
+        las aventuras: ellos son gigantes; y si tienes miedo, quítate de ahí, y
+        ponte en oración en el espacio que yo voy a entrar con ellos en fiera y
+        desigual batalla.
+      </p>
+      <p>
+        Y, diciendo esto, dio de espuelas a su caballo Rocinante, sin atender a
+        las voces que su escudero Sancho le daba, advirtiéndole que, sin duda
+        alguna, eran molinos de viento, y no gigantes, aquellos que iba a
+        acometer. Pero él iba tan puesto en que eran gigantes, que ni oía las
+        voces de su escudero Sancho ni echaba de ver, aunque estaba ya bien
+        cerca, lo que eran; antes, iba diciendo en voces altas:
+      </p>
+      <p>
+        — Non fuyades, cobardes y viles criaturas, que un solo caballero es el
+        que os acomete.
+      </p>
+      <p>
+        Levantóse en esto un poco de viento y las grandes aspas comenzaron a
+        moverse, lo cual visto por don Quijote, dijo:
+      </p>
+      <p>
+        — Pues, aunque mováis más brazos que los del gigante Briareo, me lo
+        habéis de pagar.
+      </p>
+    </div>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/transparent.gif b/mobile/android/geckoview/src/androidTest/assets/www/transparent.gif
new file mode 100644
index 0000000000..e565824aaf
Binary files /dev/null and b/mobile/android/geckoview/src/androidTest/assets/www/transparent.gif differ
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/update_manifest.json b/mobile/android/geckoview/src/androidTest/assets/www/update_manifest.json
new file mode 100644
index 0000000000..7b2de1f278
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/update_manifest.json
@@ -0,0 +1,40 @@
+{
+  "addons": {
+    "update@example.com": {
+      "updates": [
+        {
+          "version": "1.0",
+          "update_link": "https://example.org/tests/junit/update-1.xpi"
+        },
+        {
+          "version": "2.0",
+          "update_link": "https://example.org/tests/junit/update-2.xpi"
+        }
+      ]
+    },
+    "update-postpone@example.com": {
+      "updates": [
+        {
+          "version": "1.0",
+          "update_link": "https://example.org/tests/junit/update-postpone-1.xpi"
+        },
+        {
+          "version": "2.0",
+          "update_link": "https://example.org/tests/junit/update-postpone-2.xpi"
+        }
+      ]
+    },
+    "update-with-perms@example.com": {
+      "updates": [
+        {
+          "version": "1.0",
+          "update_link": "https://example.org/tests/junit/update-with-perms-1.xpi"
+        },
+        {
+          "version": "2.0",
+          "update_link": "https://example.org/tests/junit/update-with-perms-2.xpi"
+        }
+      ]
+    }
+  }
+}
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/videos/gizmo.webm b/mobile/android/geckoview/src/androidTest/assets/www/videos/gizmo.webm
new file mode 100644
index 0000000000..518531a93f
Binary files /dev/null and b/mobile/android/geckoview/src/androidTest/assets/www/videos/gizmo.webm differ
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/videos/short.mp4 b/mobile/android/geckoview/src/androidTest/assets/www/videos/short.mp4
new file mode 100644
index 0000000000..a674b7eb68
Binary files /dev/null and b/mobile/android/geckoview/src/androidTest/assets/www/videos/short.mp4 differ
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/videos/video.ogg b/mobile/android/geckoview/src/androidTest/assets/www/videos/video.ogg
new file mode 100644
index 0000000000..ac7ece3519
Binary files /dev/null and b/mobile/android/geckoview/src/androidTest/assets/www/videos/video.ogg differ
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/viewport.html b/mobile/android/geckoview/src/androidTest/assets/www/viewport.html
new file mode 100644
index 0000000000..a5dfa0f64f
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/viewport.html
@@ -0,0 +1,19 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <meta
+      name="viewport"
+      content="width=device-width, initial-scale=1.0, viewport-fit=cover"
+    />
+    <style type="text/css">
+      #wide {
+        background-color: rgb(200, 0, 0);
+        width: 100%;
+        height: 40px;
+      }
+    </style>
+  </head>
+  <body>
+    <div id="wide"></div>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/webm.html b/mobile/android/geckoview/src/androidTest/assets/www/webm.html
new file mode 100644
index 0000000000..f329582575
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/webm.html
@@ -0,0 +1,11 @@
+<html>
+    <head>
+        <meta charset="utf-8">
+        <title>WebM Video</title>
+    </head>
+    <body>
+        <video controls preload>
+            <source src="videos/gizmo.webm"></source>
+        </video>
+    </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/worker/open_window.html b/mobile/android/geckoview/src/androidTest/assets/www/worker/open_window.html
new file mode 100644
index 0000000000..d71eb0484d
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/worker/open_window.html
@@ -0,0 +1,10 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <title>Open Window test</title>
+  </head>
+  <body>
+    <p>Hello, world!</p>
+    <script type="text/javascript" src="./open_window.js"></script>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/worker/open_window.js b/mobile/android/geckoview/src/androidTest/assets/www/worker/open_window.js
new file mode 100644
index 0000000000..921cff5b09
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/worker/open_window.js
@@ -0,0 +1,15 @@
+navigator.serviceWorker.register("./service-worker.js", {
+  scope: ".",
+});
+
+function showNotification() {
+  Notification.requestPermission(function (result) {
+    if (result === "granted") {
+      navigator.serviceWorker.ready.then(function (registration) {
+        registration.showNotification("Open Window Notification", {
+          body: "Hello",
+        });
+      });
+    }
+  });
+}
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/worker/open_window_target.html b/mobile/android/geckoview/src/androidTest/assets/www/worker/open_window_target.html
new file mode 100644
index 0000000000..14775aafac
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/worker/open_window_target.html
@@ -0,0 +1,9 @@
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <title>Open Window test target</title>
+  </head>
+  <body>
+    <p>Hello, world!</p>
+  </body>
+</html>
diff --git a/mobile/android/geckoview/src/androidTest/assets/www/worker/service-worker.js b/mobile/android/geckoview/src/androidTest/assets/www/worker/service-worker.js
new file mode 100644
index 0000000000..e3fbbb6388
--- /dev/null
+++ b/mobile/android/geckoview/src/androidTest/assets/www/worker/service-worker.js
@@ -0,0 +1,15 @@
+self.addEventListener("install", function () {
+  console.log("install");
+  self.skipWaiting();
+});
+
+self.addEventListener("activate", function (e) {
+  console.log("activate");
+  e.waitUntil(self.clients.claim());
+});
+
+self.onnotificationclick = function (event) {
+  console.log("onnotificationclick");
+  self.clients.openWindow("open_window_target.html");
+  event.notification.close();
+};
-- 
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