Merging upstream version 125.0.1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

29 files changed, 1118 insertions, 19 deletions

diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/disable_bfcache.js b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/disable_bfcache.js
new file mode 100644
index 0000000000..dea70ef4bd
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/disable_bfcache.js
@@ -0,0 +1,15 @@
+// Try to disable BFCache by acquiring and never releasing a Web Lock.
+// This requires HTTPS.
+// Note: This is a workaround depending on non-specified WebLock+BFCache
+// behavior, and doesn't work on Safari. We might want to introduce a
+// test-only BFCache-disabling API instead in the future.
+// https://github.com/web-platform-tests/wpt/issues/16359#issuecomment-795004780
+// https://crbug.com/1298336
+window.disableBFCache = () => {
+  return new Promise(resolve => {
+    navigator.locks.request("disablebfcache", () => {
+      resolve();
+      return new Promise(() => {});
+    });
+  });
+};
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/executor-pushstate.html b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/executor-pushstate.html
index dcf4a798d0..3dd8f341f1 100644
--- a/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/executor-pushstate.html
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/executor-pushstate.html
@@ -11,3 +11,4 @@
 window.isLoadedFromPushState = true;
 </script>
 <script src="executor.js" type="module"></script>
+<script src="disable_bfcache.js" type="module"></script>
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/executor.html b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/executor.html
index 2d118bbe2b..c3af5f6ba8 100644
--- a/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/executor.html
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/executor.html
@@ -3,3 +3,4 @@
 <script src="event-recorder.js" type="module"></script>
 <script src="worker-helper.js" type="module"></script>
 <script src="executor.js" type="module"></script>
+<script src="disable_bfcache.js" type="module"></script>
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/executor.js b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/executor.js
index 67ce068130..5137616d85 100644
--- a/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/executor.js
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/executor.js
@@ -45,20 +45,3 @@ window.prepareNavigation = function(callback) {
     {once: true});
   executor.suspend(callback);
 }
-
-// Try to disable BFCache by acquiring and never releasing a Web Lock.
-// This requires HTTPS.
-// Note: This is a workaround depending on non-specified WebLock+BFCache
-// behavior, and doesn't work on Safari. We might want to introduce a
-// test-only BFCache-disabling API instead in the future.
-// https://github.com/web-platform-tests/wpt/issues/16359#issuecomment-795004780
-// https://crbug.com/1298336
-window.disableBFCache = () => {
-  return new Promise(resolve => {
-    // Use page's UUID as a unique lock name.
-    navigator.locks.request(uuid, () => {
-      resolve();
-      return new Promise(() => {});
-    });
-  });
-};
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/rc-helper.js b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/rc-helper.js
index 80c164f560..ad2119b738 100644
--- a/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/rc-helper.js
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/back-forward-cache/resources/rc-helper.js
@@ -41,13 +41,14 @@ function sorted(s) {
   return Array.from(s).sort();
 }
 
-// Assert expected reasons and the reported reasons match.
+// Assert expected reasons are all present. Note that the extra reasons are allowed
+// as UAs might block bfcache for their specific reasons.
 function matchReasons(expectedNotRestoredReasonsSet, notRestoredReasonsSet) {
   const missing = setMinus(
     expectedNotRestoredReasonsSet, notRestoredReasonsSet, 'Missing reasons');
   const extra = setMinus(
       notRestoredReasonsSet, expectedNotRestoredReasonsSet, 'Extra reasons');
-  assert_true(missing.size + extra.size == 0, `Expected: ${sorted(expectedNotRestoredReasonsSet)}\n` +
+  assert_true(missing.size == 0, `Expected: ${sorted(expectedNotRestoredReasonsSet)}\n` +
     `Got: ${sorted(notRestoredReasonsSet)}\n` +
     `Missing: ${sorted(missing)}\n` +
     `Extra: ${sorted(extra)}\n`);
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pageswap/pageswap-cross-origin.sub.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pageswap/pageswap-cross-origin.sub.html
new file mode 100644
index 0000000000..4b68c32378
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pageswap/pageswap-cross-origin.sub.html
@@ -0,0 +1,65 @@
+<!DOCTYPE HTML>
+<title>Tests pageswap for cross-origin navigations</title>
+<link rel="author" title="Khushal Sagar"  href="mailto:khushalsagar@chromium.org">
+<link rel="help" href="https://html.spec.whatwg.org/">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<script src="/common/get-host-info.sub.js"></script>
+<script>
+const expectedUrl = get_host_info().HTTPS_REMOTE_ORIGIN + "/html/browsers/browsing-the-web/history-traversal/pageswap/pageswap-cross-origin.sub.html?new";
+
+const params = new URLSearchParams(location.search);
+// The page the popup navigates to.
+const is_new_page = params.has('new');
+// The initial page in the popup.
+const is_popup_page = params.has('popup');
+// The test page itself.
+const is_test_page = !is_popup_page && !is_new_page;
+
+const channel = new BroadcastChannel("testchannel");
+
+if (is_test_page) {
+  const expectedUrl = location.href + "?new";
+  const expectedEvents = ["pageswap", "pagehide"];
+
+  promise_test(async t => {
+    let popup;
+    onload = () => {
+      window.events = [];
+      popup = window.open("?popup");
+    };
+
+    await new Promise(resolve => {
+      channel.addEventListener(
+        "message", t.step_func(async (e) => {
+          if (e.data === "nav") {
+            assert_array_equals(window.events, expectedEvents, 'incorrect event order');
+            popup.close();
+            resolve();
+          }
+      }));
+    });
+  }, `pageswap on navigation from script`);
+} else if (is_popup_page) {
+  onload = () => {
+    requestAnimationFrame(() => requestAnimationFrame(() => {
+      location.href = expectedUrl;
+    }));
+
+    onpageswap = (e) => {
+      window.opener.events.push("pageswap");
+      if (e.activation != null)
+        window.opener.events.push("activation");
+      if (e.viewTransition != null)
+        window.opener.events.push("transition");
+    };
+
+    onpagehide = () => {
+      window.opener.events.push("pagehide");
+      channel.postMessage("nav");
+    };
+  };
+}
+</script>
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pageswap/pageswap-iframe.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pageswap/pageswap-iframe.html
new file mode 100644
index 0000000000..05ca1a9428
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pageswap/pageswap-iframe.html
@@ -0,0 +1,45 @@
+<!DOCTYPE HTML>
+<title>Tests pageswap dispatch on iframe Documents</title>
+<link rel="author" title="Khushal Sagar"  href="mailto:khushalsagar@chromium.org">
+<link rel="help" href="https://html.spec.whatwg.org/">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<script>
+setup({explicit_done: true});
+
+function runTest(frame) {
+  let frameWindow = frame.contentWindow;
+
+  let pageswapfired = false;
+  let expectedUrl = frameWindow.location.href + '?new';
+  frameWindow.onpageswap = (e) => {
+      assert_equals(e.activation.entry.url, expectedUrl, 'activation url incorrect in pageswap');
+      assert_equals(e.activation.navigationType, "push", 'navigation type incorrect in pageswap');
+      assert_equals(e.activation.from, frameWindow.navigation.currentEntry, 'from entry incorrect in pageswap');
+      assert_false(e.activation.entry.sameDocument, 'new entry must be cross-document');
+      pageswapfired = true;
+  }
+
+  frameWindow.onpagehide = (e) => {
+      assert_true(pageswapfired, 'pageswap not fired');
+      done();
+  }
+
+  frame.src = expectedUrl;
+}
+
+promise_test(async t => {
+  onload = () => {
+    let frame = document.createElement('iframe');
+    frame.src = "/resources/blank.html";
+    frame.onload = () => {
+      frame.contentWindow.requestAnimationFrame(() => {
+        runTest(frame);
+      });
+    }
+    document.body.appendChild(frame);
+  };
+});
+</script>
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pageswap/pageswap-initial-navigation.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pageswap/pageswap-initial-navigation.html
new file mode 100644
index 0000000000..5483b9394d
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pageswap/pageswap-initial-navigation.html
@@ -0,0 +1,35 @@
+<!DOCTYPE HTML>
+<title>Tests pageswap dispatch on initial doc navigation</title>
+<link rel="author" title="Khushal Sagar"  href="mailto:khushalsagar@chromium.org">
+<link rel="help" href="https://html.spec.whatwg.org/">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<script>
+setup({explicit_done: true});
+
+function runTest(frame) {
+  let frameWindow = frame.contentWindow;
+
+  let pageswapfired = false;
+  frameWindow.onpageswap = (e) => {
+      pageswapfired = true;
+  }
+
+  frameWindow.onpagehide = (e) => {
+      assert_true(pageswapfired, 'pageswap fired');
+      done();
+  }
+
+  frame.srcdoc = '<html></html>';
+}
+
+promise_test(async t => {
+  onload = () => {
+    let frame = document.createElement('iframe');
+    document.body.appendChild(frame);
+    runTest(frame);
+  };
+});
+</script>
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pageswap/pageswap-push-from-click.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pageswap/pageswap-push-from-click.html
new file mode 100644
index 0000000000..936158cd47
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pageswap/pageswap-push-from-click.html
@@ -0,0 +1,74 @@
+<!DOCTYPE html>
+<title>pageswap navigationactivation for push navigations from user click</title>
+<link rel="help" href="https://html.spec.whatwg.org/">
+<link rel="author" href="mailto:khushalsagar@chromium.org">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<script>
+const expectedUrl = location.href + '?new';
+
+const params = new URLSearchParams(location.search);
+// The page the popup navigates to.
+const is_new_page = params.has('new');
+// The initial page in the popup.
+const is_popup_page = params.has('popup');
+// The test page itself.
+const is_test_page = !is_popup_page && !is_new_page;
+
+const channel = new BroadcastChannel("testchannel");
+
+if (is_test_page) {
+  const expectedUrl = location.href + "?new";
+  const expectedEvents = ["pageswap", expectedUrl, "push","from", "pagehide"];
+
+  promise_test(async t => {
+    let popup;
+    onload = () => {
+      document.getElementById('nav_link').remove();
+      window.events = [];
+      popup = window.open("?popup");
+
+      popup.addEventListener("load", () => {
+        popup.requestAnimationFrame(
+          () => popup.requestAnimationFrame(() => {
+            let nav_link = popup.document.getElementById('nav_link');
+            test_driver
+                .click(nav_link)
+                .catch(() => assert_unreached("click failed"));
+          }));
+      });
+    };
+
+    await new Promise(resolve => {
+      channel.addEventListener(
+        "message", t.step_func(async (e) => {
+          if (e.data === "nav") {
+            assert_array_equals(window.events, expectedEvents, 'incorrect event order');
+            popup.close();
+            resolve();
+          }
+      }));
+    });
+  }, `pageswap on navigation from user click`);
+} else if (is_popup_page) {
+  onpageswap = (e) => {
+    window.opener.events.push("pageswap");
+    if (e.viewTransition != null)
+      window.opener.events.push("transition");
+    window.opener.events.push(e.activation.entry.url);
+    window.opener.events.push(e.activation.navigationType);
+    if (e.activation.from == navigation.currentEntry)
+      window.opener.events.push("from");
+  };
+
+  onpagehide = () => {
+    window.opener.events.push("pagehide");
+    channel.postMessage("nav");
+  };
+}
+</script>
+<body>
+  <a id="nav_link" href='/html/browsers/browsing-the-web/history-traversal/pageswap/pageswap-push-from-click.html?new'>Click me</a>
+ </body>
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pageswap/pageswap-push-navigation-hidden-document.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pageswap/pageswap-push-navigation-hidden-document.html
new file mode 100644
index 0000000000..0a699232f0
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pageswap/pageswap-push-navigation-hidden-document.html
@@ -0,0 +1,68 @@
+<!DOCTYPE html>
+<title>Tests pageswap dispatch on hidden Documents</title>
+<link rel="author" title="Khushal Sagar"  href="mailto:khushalsagar@chromium.org">
+<link rel="author" href="mailto:khushalsagar@chromium.org">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<script>
+const expectedUrl = location.href + '?new';
+
+const params = new URLSearchParams(location.search);
+// The page the popup navigates to.
+const is_new_page = params.has('new');
+// The initial page in the popup.
+const is_popup_page = params.has('popup');
+// The test page itself.
+const is_test_page = !is_popup_page && !is_new_page;
+
+const channel = new BroadcastChannel("testchannel");
+
+if (is_test_page) {
+  const expectedUrl = location.href + "?new";
+  const expectedEvents = ["pageswap", expectedUrl, "push","from", "pagehide"];
+
+  promise_test(async t => {
+    let popup;
+    onload = async () => {
+      window.events = [];
+      popup = window.open("?popup");
+    };
+
+    await new Promise(resolve => {
+      channel.addEventListener(
+        "message", t.step_func(async (e) => {
+          if (e.data === "nav") {
+            assert_array_equals(window.events, expectedEvents, 'incorrect event order');
+            popup.close();
+            resolve();
+          }
+      }));
+    });
+  }, `pageswap on navigation from script`);
+} else if (is_popup_page) {
+    onload = async () => {
+      await test_driver.minimize_window();
+      assert_equals(document.visibilityState, "hidden");
+      assert_equals(document.hidden, true);
+
+      location.href = location.href.split('?')[0] + '?new';
+    };
+
+    onpageswap = (e) => {
+      window.opener.events.push("pageswap");
+      if (e.viewTransition != null)
+      window.opener.events.push("transition");
+      window.opener.events.push(e.activation.entry.url);
+      window.opener.events.push(e.activation.navigationType);
+      if (e.activation.from == navigation.currentEntry)
+        window.opener.events.push("from");
+    };
+
+    onpagehide = () => {
+      window.opener.events.push("pagehide");
+      channel.postMessage("nav");
+    };
+  }
+</script>
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pageswap/pageswap-push-navigation.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pageswap/pageswap-push-navigation.html
new file mode 100644
index 0000000000..4542d7cae2
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pageswap/pageswap-push-navigation.html
@@ -0,0 +1,64 @@
+<!DOCTYPE html>
+<title>pageswap navigationactivation for push navigations</title>
+<link rel="help" href="https://html.spec.whatwg.org/">
+<link rel="author" href="mailto:khushalsagar@chromium.org">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script>
+const expectedUrl = location.href + '?new';
+
+const params = new URLSearchParams(location.search);
+// The page the popup navigates to.
+const is_new_page = params.has('new');
+// The initial page in the popup.
+const is_popup_page = params.has('popup');
+// The test page itself.
+const is_test_page = !is_popup_page && !is_new_page;
+
+const channel = new BroadcastChannel("testchannel");
+
+if (is_test_page) {
+  const expectedUrl = location.href + "?new";
+  const expectedEvents = ["pageswap", expectedUrl, "push","from", "pagehide"];
+
+  promise_test(async t => {
+    let popup;
+    onload = () => {
+      window.events = [];
+      popup = window.open("?popup");
+    };
+
+    await new Promise(resolve => {
+      channel.addEventListener(
+        "message", t.step_func(async (e) => {
+          if (e.data === "nav") {
+            assert_array_equals(window.events, expectedEvents, 'incorrect event order');
+            popup.close();
+            resolve();
+          }
+      }));
+    });
+  }, `pageswap on navigation from script`);
+} else if (is_popup_page) {
+  onload = () => {
+    requestAnimationFrame(() => requestAnimationFrame(() => {
+      location.href = location.href.split('?')[0] + '?new';
+    }));
+
+    onpageswap = (e) => {
+      window.opener.events.push("pageswap");
+      if (e.viewTransition != null)
+      window.opener.events.push("transition");
+      window.opener.events.push(e.activation.entry.url);
+      window.opener.events.push(e.activation.navigationType);
+      if (e.activation.from == navigation.currentEntry)
+        window.opener.events.push("from");
+    };
+
+    onpagehide = () => {
+      window.opener.events.push("pagehide");
+      channel.postMessage("nav");
+    };
+  };
+}
+</script>
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pageswap/pageswap-push-with-cross-origin-redirect.sub.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pageswap/pageswap-push-with-cross-origin-redirect.sub.html
new file mode 100644
index 0000000000..8ecf920b51
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pageswap/pageswap-push-with-cross-origin-redirect.sub.html
@@ -0,0 +1,69 @@
+<!DOCTYPE html>
+<title>pageswap navigationactivation for push navigations with a  same-origin final url with cross-origin redirects</title>
+<link rel="help" href="https://html.spec.whatwg.org/">
+<link rel="author" href="mailto:khushalsagar@chromium.org">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/common/get-host-info.sub.js"></script>
+<script>
+const params = new URLSearchParams(location.search);
+// The page the popup navigates to.
+const is_new_page = params.has('new');
+// The initial page in the popup.
+const is_popup_page = params.has('popup');
+// The test page itself.
+const is_test_page = !is_popup_page && !is_new_page;
+
+const channel = new BroadcastChannel("testchannel");
+
+if (is_test_page) {
+  const expectedUrl = location.href + "?new";
+  const expectedEvents = ["pageswap", "pagehide", "pagereveal", "activation"];
+
+  promise_test(async t => {
+    let popup;
+    onload = () => {
+      window.events = [];
+      popup = window.open("?popup");
+    };
+
+    await new Promise(resolve => {
+      channel.addEventListener(
+        "message", t.step_func(async (e) => {
+          if (e.data === "nav") {
+            assert_array_equals(window.events, expectedEvents, 'incorrect event order');
+            popup.close();
+            resolve();
+          }
+      }));
+    });
+  }, `pageswap on navigation with same-origin redirect`);
+} else if (is_popup_page) {
+  onload = () => {
+    requestAnimationFrame(() => requestAnimationFrame(() => {
+      let newUrl = get_host_info().HTTPS_REMOTE_ORIGIN + "/common/redirect.py?location=" + location.href.split('?')[0] + "?new";
+      location.href = newUrl
+    }));
+
+    onpageswap = (e) => {
+      window.opener.events.push("pageswap");
+      if (e.viewTransition != null)
+        window.opener.events.push("transition");
+      if (e.activation != null)
+        window.opener.events.push("activation");
+    };
+
+    onpagehide = () => {
+      window.opener.events.push("pagehide");
+    };
+  };
+} else {
+  assert_true(is_new_page);
+  onpageshow = () => {
+    window.opener.events.push("pagereveal");
+    if (navigation.activation.from != null)
+      window.opener.events.push("activation");
+    channel.postMessage("nav");
+  }
+}
+</script>
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pageswap/pageswap-push-with-redirect.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pageswap/pageswap-push-with-redirect.html
new file mode 100644
index 0000000000..8252fff84d
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pageswap/pageswap-push-with-redirect.html
@@ -0,0 +1,64 @@
+<!DOCTYPE html>
+<title>pageswap navigationactivation for push navigations with a same-origin redirect</title>
+<link rel="help" href="https://html.spec.whatwg.org/">
+<link rel="author" href="mailto:khushalsagar@chromium.org">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script>
+const expectedUrl = location.href + '?new';
+
+const params = new URLSearchParams(location.search);
+// The page the popup navigates to.
+const is_new_page = params.has('new');
+// The initial page in the popup.
+const is_popup_page = params.has('popup');
+// The test page itself.
+const is_test_page = !is_popup_page && !is_new_page;
+
+const channel = new BroadcastChannel("testchannel");
+
+if (is_test_page) {
+  const expectedUrl = location.href + "?new";
+  const expectedEvents = ["pageswap", expectedUrl, "push","from", "pagehide"];
+
+  promise_test(async t => {
+    let popup;
+    onload = () => {
+      window.events = [];
+      popup = window.open("?popup");
+    };
+
+    await new Promise(resolve => {
+      channel.addEventListener(
+        "message", t.step_func(async (e) => {
+          if (e.data === "nav") {
+            assert_array_equals(window.events, expectedEvents, 'incorrect event order');
+            popup.close();
+            resolve();
+          }
+      }));
+    });
+  }, `pageswap on navigation with same-origin redirect`);
+} else if (is_popup_page) {
+  onload = () => {
+    requestAnimationFrame(() => requestAnimationFrame(() => {
+      location.href = "/common/redirect.py?location=/html/browsers/browsing-the-web/history-traversal/pageswap/pageswap-push-with-redirect.html?new";
+    }));
+
+    onpageswap = (e) => {
+      window.opener.events.push("pageswap");
+      if (e.viewTransition != null)
+      window.opener.events.push("transition");
+      window.opener.events.push(e.activation.entry.url);
+      window.opener.events.push(e.activation.navigationType);
+      if (e.activation.from == navigation.currentEntry)
+        window.opener.events.push("from");
+    };
+
+    onpagehide = () => {
+      window.opener.events.push("pagehide");
+      channel.postMessage("nav");
+    };
+  };
+}
+</script>
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pageswap/pageswap-reload-navigation.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pageswap/pageswap-reload-navigation.html
new file mode 100644
index 0000000000..f7539ebc47
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pageswap/pageswap-reload-navigation.html
@@ -0,0 +1,65 @@
+<!DOCTYPE html>
+<title>pageswap navigationactivation for replace navigations</title>
+<link rel="help" href="https://html.spec.whatwg.org/">
+<link rel="author" href="mailto:khushalsagar@chromium.org">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script>
+const expectedUrl = location.href + '?new';
+
+const params = new URLSearchParams(location.search);
+// The initial page in the popup.
+const is_popup_page = params.has('popup') && !window.opener.didreload;
+// The test page itself.
+const is_test_page = !params.has('popup');
+
+const channel = new BroadcastChannel("testchannel");
+
+if (is_test_page) {
+  const expectedUrl = location.href.split('?')[0] + "?popup";
+  const expectedEvents = ["pageswap", "entry", "reload","from", "pagehide"];
+
+  promise_test(async t => {
+    let popup;
+    onload = () => {
+      window.events = [];
+      window.didreload = false;
+      popup = window.open("?popup");
+    };
+
+    await new Promise(resolve => {
+      channel.addEventListener(
+        "message", t.step_func(async (e) => {
+          if (e.data === "nav") {
+            assert_array_equals(window.events, expectedEvents, 'incorrect event order');
+            popup.close();
+            resolve();
+          }
+      }));
+    });
+  }, `pageswap on replace navigation from script`);
+} else if (is_popup_page) {
+  onload = () => {
+    requestAnimationFrame(() => requestAnimationFrame(() => {
+      window.opener.didreload = true;
+      location.reload();
+    }));
+
+    onpageswap = (e) => {
+      window.opener.events.push("pageswap");
+      if (e.viewTransition != null)
+        window.opener.events.push("transition");
+      if (e.activation.entry == navigation.currentEntry)
+        window.opener.events.push("entry");
+      window.opener.events.push(e.activation.navigationType);
+      if (e.activation.from == navigation.currentEntry)
+        window.opener.events.push("from");
+    };
+
+    onpagehide = () => {
+      window.opener.events.push("pagehide");
+      channel.postMessage("nav");
+    };
+  };
+}
+</script>
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pageswap/pageswap-replace-navigation.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pageswap/pageswap-replace-navigation.html
new file mode 100644
index 0000000000..f6b3f7408c
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pageswap/pageswap-replace-navigation.html
@@ -0,0 +1,64 @@
+<!DOCTYPE html>
+<title>pageswap navigationactivation for replace navigations</title>
+<link rel="help" href="https://html.spec.whatwg.org/">
+<link rel="author" href="mailto:khushalsagar@chromium.org">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script>
+const expectedUrl = location.href + '?new';
+
+const params = new URLSearchParams(location.search);
+// The page the popup navigates to.
+const is_new_page = params.has('new');
+// The initial page in the popup.
+const is_popup_page = params.has('popup');
+// The test page itself.
+const is_test_page = !is_popup_page && !is_new_page;
+
+const channel = new BroadcastChannel("testchannel");
+
+if (is_test_page) {
+  const expectedUrl = location.href.split('?')[0] + "?new";
+  const expectedEvents = ["pageswap", expectedUrl, "replace","from", "pagehide"];
+
+  promise_test(async t => {
+    let popup;
+    onload = () => {
+      window.events = [];
+      popup = window.open("?popup");
+    };
+
+    await new Promise(resolve => {
+      channel.addEventListener(
+        "message", t.step_func(async (e) => {
+          if (e.data === "nav") {
+            assert_array_equals(window.events, expectedEvents, 'incorrect event order');
+            popup.close();
+            resolve();
+          }
+      }));
+    });
+  }, `pageswap on replace navigation from script`);
+} else if (is_popup_page) {
+  onload = () => {
+    requestAnimationFrame(() => requestAnimationFrame(() => {
+      location.replace(location.href.split('?')[0] + '?new');
+    }));
+
+    onpageswap = (e) => {
+      window.opener.events.push("pageswap");
+      if (e.viewTransition != null)
+        window.opener.events.push("transition");
+      window.opener.events.push(e.activation.entry.url);
+      window.opener.events.push(e.activation.navigationType);
+      if (e.activation.from == navigation.currentEntry)
+        window.opener.events.push("from");
+    };
+
+    onpagehide = () => {
+      window.opener.events.push("pagehide");
+      channel.postMessage("nav");
+    };
+  };
+}
+</script>
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pageswap/pageswap-replace-with-cross-origin-redirect.sub.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pageswap/pageswap-replace-with-cross-origin-redirect.sub.html
new file mode 100644
index 0000000000..c6ced62057
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pageswap/pageswap-replace-with-cross-origin-redirect.sub.html
@@ -0,0 +1,69 @@
+<!DOCTYPE html>
+<title>pageswap navigationactivation for replace navigations with a  same-origin final url with cross-origin redirects</title>
+<link rel="help" href="https://html.spec.whatwg.org/">
+<link rel="author" href="mailto:khushalsagar@chromium.org">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/common/get-host-info.sub.js"></script>
+<script>
+const params = new URLSearchParams(location.search);
+// The page the popup navigates to.
+const is_new_page = params.has('new');
+// The initial page in the popup.
+const is_popup_page = params.has('popup');
+// The test page itself.
+const is_test_page = !is_popup_page && !is_new_page;
+
+const channel = new BroadcastChannel("testchannel");
+
+if (is_test_page) {
+  const expectedUrl = location.href + "?new";
+  const expectedEvents = ["pageswap", "pagehide", "pagereveal", "activation"];
+
+  promise_test(async t => {
+    let popup;
+    onload = () => {
+      window.events = [];
+      popup = window.open("?popup");
+    };
+
+    await new Promise(resolve => {
+      channel.addEventListener(
+        "message", t.step_func(async (e) => {
+          if (e.data === "nav") {
+            assert_array_equals(window.events, expectedEvents, 'incorrect event order');
+            popup.close();
+            resolve();
+          }
+      }));
+    });
+  }, `pageswap on navigation with same-origin redirect`);
+} else if (is_popup_page) {
+  onload = () => {
+    requestAnimationFrame(() => requestAnimationFrame(() => {
+      let newUrl = get_host_info().HTTPS_REMOTE_ORIGIN + "/common/redirect.py?location=" + location.href.split('?')[0] + "?new";
+      location.replace(newUrl);
+    }));
+
+    onpageswap = (e) => {
+      window.opener.events.push("pageswap");
+      if (e.viewTransition != null)
+        window.opener.events.push("transition");
+      if (e.activation != null)
+        window.opener.events.push("activation");
+    };
+
+    onpagehide = () => {
+      window.opener.events.push("pagehide");
+    };
+  };
+} else {
+  assert_true(is_new_page);
+  onpageshow = () => {
+    window.opener.events.push("pagereveal");
+    if (navigation.activation.from != null)
+      window.opener.events.push("activation");
+    channel.postMessage("nav");
+  }
+}
+</script>
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pageswap/pageswap-traverse-navigation-cross-origin-redirect-no-bfcache.https.sub.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pageswap/pageswap-traverse-navigation-cross-origin-redirect-no-bfcache.https.sub.html
new file mode 100644
index 0000000000..5543830721
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pageswap/pageswap-traverse-navigation-cross-origin-redirect-no-bfcache.https.sub.html
@@ -0,0 +1,77 @@
+<!DOCTYPE html>
+<title>pageswap navigationactivation for traverse navigation when original navigation has cross-origin redirect</title>
+<link rel="help" href="https://html.spec.whatwg.org/">
+<link rel="author" href="mailto:khushalsagar@chromium.org">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/common.js"></script>
+<script src="/common/get-host-info.sub.js"></script>
+<script src="/html/browsers/browsing-the-web/back-forward-cache/resources/disable_bfcache.js"></script>
+<style></style>
+<script>
+const channel = new BroadcastChannel("testchannel");
+
+const params = new URLSearchParams(location.search);
+const is_initial_page_first_navigation = params.has('popup') && navigation.entries().length == 1;
+const is_new_page = params.has('new');
+const is_test_page = !params.has('popup') && !params.has('new');
+
+// The test page which opens a popup for the navigation sequence.
+if (is_test_page) {
+  const expectedUrl = location.href.split('?')[0] + "?popup";
+  const expectedEvents = ["pageswap", expectedUrl, "traverse","from", "pagehide"];
+
+  promise_test(async t => {
+    let popup;
+    onload = () => {
+      window.events = [];
+      popup = window.open("?popup");
+    };
+
+    await new Promise(resolve => {
+      channel.addEventListener(
+        "message", t.step_func(async (e) => {
+          if (e.data === "nav") {
+            assert_array_equals(window.events, expectedEvents, 'incorrect event order');
+            popup.close();
+            resolve();
+          }
+      }));
+    });
+  }, `pageswap on traverse navigation from script`);
+} else if (is_initial_page_first_navigation) {
+  // The popup page which the user navigates back to.
+  onload = async () => {
+    await disableBFCache();
+    requestAnimationFrame(() => requestAnimationFrame(() => {
+      let newUrl = get_host_info().HTTPS_REMOTE_ORIGIN + "/common/redirect.py?location=" + location.href.split('?')[0] + "?new";
+      location.href = newUrl
+    }));
+  };
+
+  onpageshow = (e) => {
+    assert_false(e.persisted, 'the test should run without BFCache');
+  }
+} else if (is_new_page) {
+  onload = () => {
+    requestAnimationFrame(() => requestAnimationFrame(() => {
+      navigation.back();
+    }));
+  };
+
+  onpageswap = (e) => {
+    window.opener.events.push("pageswap");
+    if (e.viewTransition != null)
+      window.opener.events.push("transition");
+    window.opener.events.push(e.activation.entry.url);
+    window.opener.events.push(e.activation.navigationType);
+    if (e.activation.from == navigation.currentEntry)
+      window.opener.events.push("from");
+  };
+
+  onpagehide = () => {
+    window.opener.events.push("pagehide");
+    channel.postMessage("nav");
+  };
+}
+</script>
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pageswap/pageswap-traverse-navigation-no-bfcache.https.html b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pageswap/pageswap-traverse-navigation-no-bfcache.https.html
new file mode 100644
index 0000000000..9e8c0e100e
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/history-traversal/pageswap/pageswap-traverse-navigation-no-bfcache.https.html
@@ -0,0 +1,75 @@
+<!DOCTYPE html>
+<title>pageswap navigationactivation for traverse navigations</title>
+<link rel="help" href="https://html.spec.whatwg.org/">
+<link rel="author" href="mailto:khushalsagar@chromium.org">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/common.js"></script>
+<script src="/html/browsers/browsing-the-web/back-forward-cache/resources/disable_bfcache.js"></script>
+<style></style>
+<script>
+const channel = new BroadcastChannel("testchannel");
+
+const params = new URLSearchParams(location.search);
+const is_initial_page_first_navigation = params.has('popup') && navigation.entries().length == 1;
+const is_new_page = params.has('new');
+const is_test_page = !params.has('popup') && !params.has('new');
+
+// The test page which opens a popup for the navigation sequence.
+if (is_test_page) {
+  const expectedUrl = location.href.split('?')[0] + "?popup";
+  const expectedEvents = ["pageswap", expectedUrl, "traverse","from", "pagehide"];
+
+  promise_test(async t => {
+    let popup;
+    onload = () => {
+      window.events = [];
+      popup = window.open("?popup");
+    };
+
+    await new Promise(resolve => {
+      channel.addEventListener(
+        "message", t.step_func(async (e) => {
+          if (e.data === "nav") {
+            assert_array_equals(window.events, expectedEvents, 'incorrect event order');
+            popup.close();
+            resolve();
+          }
+      }));
+    });
+  }, `pageswap on traverse navigation from script`);
+} else if (is_initial_page_first_navigation) {
+  // The popup page which the user navigates back to.
+  onload = async () => {
+    await disableBFCache();
+    requestAnimationFrame(() => requestAnimationFrame(() => {
+      location.href = location.href.split('?')[0] + '?new';
+    }));
+  };
+
+  onpageshow = (e) => {
+    assert_false(e.persisted, 'the test should run without BFCache');
+  }
+} else if (is_new_page) {
+  onload = () => {
+    requestAnimationFrame(() => requestAnimationFrame(() => {
+      navigation.back();
+    }));
+  };
+
+  onpageswap = (e) => {
+    window.opener.events.push("pageswap");
+    if (e.viewTransition != null)
+      window.opener.events.push("transition");
+    window.opener.events.push(e.activation.entry.url);
+    window.opener.events.push(e.activation.navigationType);
+    if (e.activation.from == navigation.currentEntry)
+      window.opener.events.push("from");
+  };
+
+  onpagehide = () => {
+    window.opener.events.push("pagehide");
+    channel.postMessage("nav");
+  };
+}
+</script>
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/history_reload_referrer-1.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_reload_referrer-1.html
new file mode 100644
index 0000000000..d083a2a1d3
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_reload_referrer-1.html
@@ -0,0 +1,16 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <title>
+      Ensure referrer header persists after
+      history.pushState/replaceState/fragment navigation and reload
+    </title>
+  </head>
+  <body>
+    <noscript><p>Enable JavaScript and reload</p></noscript>
+    <div id="log"></div>
+    <script type="text/javascript">
+      location.href = "history_reload_referrer-2.html?pipe=sub";
+    </script>
+  </body>
+</html>
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/history_reload_referrer-2.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_reload_referrer-2.html
new file mode 100644
index 0000000000..d85517a15f
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_reload_referrer-2.html
@@ -0,0 +1,56 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <title>
+      Ensure referrer header persists after
+      history.pushState/replaceState/fragment navigation and reload
+    </title>
+  </head>
+  <body>
+    <a id="fragment" href="#fragment">fragment</a>
+    <noscript><p>Enable JavaScript and reload</p></noscript>
+    <div id="log"></div>
+    <script type="text/javascript">
+      const step = localStorage.getItem("history_reload_referrer_step") || "1";
+      localStorage.setItem("history_reload_referrer_step", parseInt(step) + 1);
+
+      var httpReferer = unescape("{{headers[referer]}}");
+      var expectedReferrer = location.href.replace(
+        /\/[^\/]*$/,
+        "\/history_reload_referrer-1.html"
+      );
+
+      parent.test(function () {
+        parent.assert_equals(httpReferer, expectedReferrer);
+      }, `Step ${step}: Checking HTTP referrer (is "${httpReferer}")`);
+      parent.test(function () {
+        parent.assert_equals(document.referrer, expectedReferrer);
+      }, `Step ${step}: Checking document.referrer (is "${httpReferer}")`);
+
+      switch (step) {
+        case "1":
+          history.pushState("", "", location);
+          location.reload();
+          break;
+
+        case "2":
+          history.replaceState("", "", location);
+          location.reload();
+          break;
+
+        case "3":
+          document.getElementById("fragment").click();
+          location.reload();
+          break;
+
+        case "4":
+          localStorage.removeItem("history_reload_referrer_step");
+          parent.done();
+          break;
+
+        default:
+          throw new Error(`Unexpected step "${step}"`);
+      }
+    </script>
+  </body>
+</html>
diff --git a/testing/web-platform/tests/html/browsers/history/the-history-interface/history_reload_referrer.html b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_reload_referrer.html
new file mode 100644
index 0000000000..d11ee89702
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-history-interface/history_reload_referrer.html
@@ -0,0 +1,26 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <title>
+      Ensure referrer header persists after
+      history.pushState/replaceState/fragment navigation and reload
+    </title>
+    <script type="text/javascript" src="/resources/testharness.js"></script>
+    <script
+      type="text/javascript"
+      src="/resources/testharnessreport.js"
+    ></script>
+  </head>
+  <body>
+    <noscript><p>Enable JavaScript and reload</p></noscript>
+    <div id="log"></div>
+    <script type="text/javascript">
+      setup({ explicit_done: true });
+      var iframe = document.createElement("iframe");
+      window.onload = function () {
+        iframe.setAttribute("src", "history_reload_referrer-1.html");
+        document.body.appendChild(iframe);
+      };
+    </script>
+  </body>
+</html>
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/assign-replace-from-iframe.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/assign-replace-from-iframe.html
new file mode 100644
index 0000000000..a0cd9f25ef
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/assign-replace-from-iframe.html
@@ -0,0 +1,31 @@
+<!DOCTYPE HTML>
+<html>
+  <head>
+    <title>Referer with location.replace and location.assign</title>
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+  </head>
+  <body>
+    <iframe src="/resources/blank.html" hidden></iframe>
+    <script>
+      async_test(function(t) {
+        function on_message(e) {
+        const referrer = e.data;
+        assert_equals(referrer, window.location.href);
+        t.done();
+      }
+      window.addEventListener('message', t.step_func(on_message), false);
+      document.querySelector("iframe").contentWindow.location.replace("resources/iframe-contents.sub.html?replace");
+      }, "Browser sends Referer header in iframe request when location.replace is called from an iframe");
+      async_test(function(t) {
+        function on_message(e) {
+        const referrer = e.data;
+        assert_equals(referrer, window.location.href);
+        t.done();
+      }
+      window.addEventListener('message', t.step_func(on_message), false);
+      document.querySelector("iframe").contentWindow.location.assign("resources/iframe-contents.sub.html?assign");
+      }, "Browser sends Referer header in iframe request when location.assign is called from an iframe");
+    </script>
+  </body>
+</html>
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/assign-replace-from-top-to-nested-iframe.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/assign-replace-from-top-to-nested-iframe.html
new file mode 100644
index 0000000000..eb6e4960dc
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/assign-replace-from-top-to-nested-iframe.html
@@ -0,0 +1,36 @@
+<!DOCTYPE HTML>
+<html>
+  <head>
+    <title>Referer with location.replace and location.assign with nested iframes</title>
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+  </head>
+  <body>
+    <iframe src="resources/iframe-with-iframe.html" hidden></iframe>
+    <script>
+      const iframe = document.querySelector("iframe");
+      async_test(function(t) {
+        function on_message(e) {
+          const referrer = e.data;
+          assert_equals(referrer, iframe.contentWindow.location.href);
+          t.done();
+        }
+        window.addEventListener('message', t.step_func(on_message), false);
+        window.addEventListener('load', function () {
+            iframe.contentDocument.querySelector("iframe").contentWindow.location.replace("/resources/blank.html");
+        }, false);
+      }, "Browser sends Referer header in nested iframe request when location.replace is called on an iframe");
+      async_test(function(t) {
+        function on_message(e) {
+          const referrer = e.data;
+          assert_equals(referrer, iframe.contentWindow.location.href);
+          t.done();
+        }
+        window.addEventListener('message', t.step_func(on_message), false);
+        window.addEventListener('load', function () {
+            iframe.contentDocument.querySelector("iframe").contentWindow.location.replace("/resources/blank.html");
+        }, false);
+      }, "Browser sends Referer header in nested iframe request when location.assign is called on an iframe");
+    </script>
+  </body>
+</html>
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/assign-with-nested-iframe.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/assign-with-nested-iframe.html
new file mode 100644
index 0000000000..e043623c08
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/assign-with-nested-iframe.html
@@ -0,0 +1,21 @@
+<!DOCTYPE HTML>
+<html>
+  <head>
+    <title>Referer with location.assign and nested frames</title>
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+  </head>
+  <body>
+    <iframe src="resources/replace-or-assign-call-on-iframe.html?assign" hidden></iframe>
+    <script>
+      async_test(function(t) {
+        function on_message(e) {
+        const nestedIframeReferrer = e.data;
+        assert_equals(nestedIframeReferrer, document.querySelector("iframe").contentWindow.location.href);
+        t.done();
+      }
+      window.addEventListener('message', t.step_func(on_message), false);
+      }, "Browser sends Referer header when location.assign is called in iframe document on another nested iframe element");
+    </script>
+  </body>
+</html>
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/replace-with-nested-iframe.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/replace-with-nested-iframe.html
new file mode 100644
index 0000000000..e6620bd29c
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/replace-with-nested-iframe.html
@@ -0,0 +1,21 @@
+<!DOCTYPE HTML>
+<html>
+  <head>
+    <title>Referer with location.replace and nested frames</title>
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+  </head>
+  <body>
+    <iframe src="resources/replace-or-assign-call-on-iframe.html?replace" hidden></iframe>
+    <script>
+      async_test(function(t) {
+        function on_message(e) {
+        const nestedIframeReferrer = e.data;
+        assert_equals(nestedIframeReferrer, document.querySelector("iframe").contentWindow.location.href);
+        t.done();
+      }
+      window.addEventListener('message', t.step_func(on_message), false);
+      }, "Browser sends Referer header when location.replace is called in iframe document on another nested iframe element");
+    </script>
+  </body>
+</html>
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/resources/iframe-contents.sub.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/resources/iframe-contents.sub.html
new file mode 100644
index 0000000000..8ac0a264db
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/resources/iframe-contents.sub.html
@@ -0,0 +1,14 @@
+<!DOCTYPE HTML>
+<html>
+  <head>
+    <title>Resource file for test of Referer with location.replace</title>
+  </head>
+  <body>
+    <div></div>
+    <script>
+      const referer = "{{header_or_default(referer, missing)}}"
+      window.parent.postMessage(referer);
+      document.querySelector("div").textContent = `Referer header: ${referer}`;
+    </script>
+  </body>
+</html>
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/resources/iframe-postmessage-to-parent-parent.sub.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/resources/iframe-postmessage-to-parent-parent.sub.html
new file mode 100644
index 0000000000..25c4af19a3
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/resources/iframe-postmessage-to-parent-parent.sub.html
@@ -0,0 +1,14 @@
+<!DOCTYPE HTML>
+<html>
+  <head>
+    <title>Resource file for test of Referer with location.replace</title>
+  </head>
+  <body>
+    <div></div>
+    <script>
+      const referer = "{{header_or_default(referer, missing)}}"
+      window.parent.parent.postMessage(referer);
+      document.querySelector("div").textContent = `Referer header: ${referer}`;
+    </script>
+  </body>
+</html>
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/resources/iframe-with-iframe.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/resources/iframe-with-iframe.html
new file mode 100644
index 0000000000..675f293ffa
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/resources/iframe-with-iframe.html
@@ -0,0 +1,9 @@
+<!DOCTYPE HTML>
+<html>
+  <head>
+    <title>Resource file for test of Referer with location.replace and location.assign</title>
+  </head>
+  <body>
+    <iframe src="iframe-postmessage-to-parent-parent.sub.html"></iframe>
+  </body>
+</html>
diff --git a/testing/web-platform/tests/html/browsers/history/the-location-interface/resources/replace-or-assign-call-on-iframe.html b/testing/web-platform/tests/html/browsers/history/the-location-interface/resources/replace-or-assign-call-on-iframe.html
new file mode 100644
index 0000000000..bdad8334a5
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/history/the-location-interface/resources/replace-or-assign-call-on-iframe.html
@@ -0,0 +1,20 @@
+<!DOCTYPE HTML>
+<html>
+  <head>
+    <title>Referer with location.replace and location.assign</title>
+  </head>
+  <body>
+    <iframe src="/resources/blank.html" hidden></iframe>
+    <script>
+      window.addEventListener('message', function (e) {
+        const referrer = e.data;
+        window.parent.postMessage(referrer);
+      });
+      if (window.location.search === "?replace") {
+        document.querySelector("iframe").contentWindow.location.replace("iframe-contents.sub.html?replace");
+      } else if (window.location.search === "?assign") {
+        document.querySelector("iframe").contentWindow.location.assign("iframe-contents.sub.html?assign");
+      }
+    </script>
+  </body>
+</html>