Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

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

203 files changed, 8443 insertions, 0 deletions

diff --git a/docshell/test/navigation/NavigationUtils.js b/docshell/test/navigation/NavigationUtils.js
new file mode 100644
index 0000000000..c4b52dc62f
--- /dev/null
+++ b/docshell/test/navigation/NavigationUtils.js
@@ -0,0 +1,203 @@
+/* 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/. */
+
+// /////////////////////////////////////////////////////////////////////////
+//
+// Utilities for navigation tests
+//
+// /////////////////////////////////////////////////////////////////////////
+
+var body = "This frame was navigated.";
+var target_url = "navigation_target_url.html";
+
+var popup_body = "This is a popup";
+var target_popup_url = "navigation_target_popup_url.html";
+
+// /////////////////////////////////////////////////////////////////////////
+// Functions that navigate frames
+// /////////////////////////////////////////////////////////////////////////
+
+function navigateByLocation(wnd) {
+  try {
+    wnd.location = target_url;
+  } catch (ex) {
+    // We need to keep our finished frames count consistent.
+    // Oddly, this ends up simulating the behavior of IE7.
+    window.open(target_url, "_blank", "width=10,height=10");
+  }
+}
+
+function navigateByOpen(name) {
+  window.open(target_url, name, "width=10,height=10");
+}
+
+function navigateByForm(name) {
+  var form = document.createElement("form");
+  form.action = target_url;
+  form.method = "POST";
+  form.target = name;
+  document.body.appendChild(form);
+  form.submit();
+}
+
+var hyperlink_count = 0;
+
+function navigateByHyperlink(name) {
+  var link = document.createElement("a");
+  link.href = target_url;
+  link.target = name;
+  link.id = "navigation_hyperlink_" + hyperlink_count++;
+  document.body.appendChild(link);
+  sendMouseEvent({ type: "click" }, link.id);
+}
+
+// /////////////////////////////////////////////////////////////////////////
+// Functions that call into Mochitest framework
+// /////////////////////////////////////////////////////////////////////////
+
+async function isNavigated(wnd, message) {
+  var result = null;
+  try {
+    result = await SpecialPowers.spawn(wnd, [], () =>
+      this.content.document.body.innerHTML.trim()
+    );
+  } catch (ex) {
+    result = ex;
+  }
+  is(result, body, message);
+}
+
+function isBlank(wnd, message) {
+  var result = null;
+  try {
+    result = wnd.document.body.innerHTML.trim();
+  } catch (ex) {
+    result = ex;
+  }
+  is(result, "This is a blank document.", message);
+}
+
+function isAccessible(wnd, message) {
+  try {
+    wnd.document.body.innerHTML;
+    ok(true, message);
+  } catch (ex) {
+    ok(false, message);
+  }
+}
+
+function isInaccessible(wnd, message) {
+  try {
+    wnd.document.body.innerHTML;
+    ok(false, message);
+  } catch (ex) {
+    ok(true, message);
+  }
+}
+
+function delay(msec) {
+  return new Promise(resolve => setTimeout(resolve, msec));
+}
+
+// /////////////////////////////////////////////////////////////////////////
+// Functions that uses SpecialPowers.spawn
+// /////////////////////////////////////////////////////////////////////////
+
+async function waitForFinishedFrames(numFrames) {
+  SimpleTest.requestFlakyTimeout("Polling");
+
+  var finishedWindows = new Set();
+
+  async function searchForFinishedFrames(win) {
+    try {
+      let { href, bodyText, readyState } = await SpecialPowers.spawn(
+        win,
+        [],
+        () => {
+          return {
+            href: this.content.location.href,
+            bodyText:
+              this.content.document.body &&
+              this.content.document.body.textContent.trim(),
+            readyState: this.content.document.readyState,
+          };
+        }
+      );
+
+      if (
+        (href.endsWith(target_url) || href.endsWith(target_popup_url)) &&
+        (bodyText == body || bodyText == popup_body) &&
+        readyState == "complete"
+      ) {
+        finishedWindows.add(SpecialPowers.getBrowsingContextID(win));
+      }
+    } catch (e) {
+      // This may throw if a frame is not fully initialized, in which
+      // case we'll handle it in a later iteration.
+    }
+
+    for (let i = 0; i < win.frames.length; i++) {
+      await searchForFinishedFrames(win.frames[i]);
+    }
+  }
+
+  while (finishedWindows.size < numFrames) {
+    await delay(500);
+
+    for (let win of SpecialPowers.getGroupTopLevelWindows(window)) {
+      win = SpecialPowers.unwrap(win);
+      await searchForFinishedFrames(win);
+    }
+  }
+
+  if (finishedWindows.size > numFrames) {
+    throw new Error("Too many frames loaded.");
+  }
+}
+
+async function getFramesByName(name) {
+  let results = [];
+  for (let win of SpecialPowers.getGroupTopLevelWindows(window)) {
+    win = SpecialPowers.unwrap(win);
+    if (
+      (await SpecialPowers.spawn(win, [], () => this.content.name)) === name
+    ) {
+      results.push(win);
+    }
+  }
+
+  return results;
+}
+
+async function cleanupWindows() {
+  for (let win of SpecialPowers.getGroupTopLevelWindows(window)) {
+    win = SpecialPowers.unwrap(win);
+    if (win.closed) {
+      continue;
+    }
+
+    let href = "";
+    try {
+      href = await SpecialPowers.spawn(
+        win,
+        [],
+        () =>
+          this.content && this.content.location && this.content.location.href
+      );
+    } catch (error) {
+      // SpecialPowers.spawn(win, ...) throws if win is closed. We did
+      // our best to not call it on a closed window, but races happen.
+      if (!win.closed) {
+        throw error;
+      }
+    }
+
+    if (
+      href &&
+      (href.endsWith(target_url) || href.endsWith(target_popup_url))
+    ) {
+      win.close();
+    }
+  }
+}
diff --git a/docshell/test/navigation/blank.html b/docshell/test/navigation/blank.html
new file mode 100644
index 0000000000..5360333f1d
--- /dev/null
+++ b/docshell/test/navigation/blank.html
@@ -0,0 +1 @@
+<html><body>This is a blank document.</body></html>
\ No newline at end of file
diff --git a/docshell/test/navigation/bluebox_bug430723.html b/docshell/test/navigation/bluebox_bug430723.html
new file mode 100644
index 0000000000..5dcc533562
--- /dev/null
+++ b/docshell/test/navigation/bluebox_bug430723.html
@@ -0,0 +1,6 @@
+<html><head>
+<script> window.addEventListener("pageshow", function() { opener.nextTest(); }); </script>
+</head><body>
+<div style="position:absolute; left:0px; top:0px; width:50%; height:150%; background-color:blue">
+<p>This is a very tall blue box.</p>
+</div></body></html>
diff --git a/docshell/test/navigation/browser.ini b/docshell/test/navigation/browser.ini
new file mode 100644
index 0000000000..baca6b401c
--- /dev/null
+++ b/docshell/test/navigation/browser.ini
@@ -0,0 +1,23 @@
+[DEFAULT]
+support-files =
+  bug343515_pg1.html
+  bug343515_pg2.html
+  bug343515_pg3.html
+  bug343515_pg3_1.html
+  bug343515_pg3_1_1.html
+  bug343515_pg3_2.html
+  blank.html
+  redirect_to_blank.sjs
+
+[browser_bug1757458.js]
+[browser_test_bfcache_eviction.js]
+[browser_bug343515.js]
+[browser_test-content-chromeflags.js]
+tags = openwindow
+[browser_ghistorymaxsize_is_0.js]
+[browser_test_shentry_wireframe.js]
+skip-if =
+  !sessionHistoryInParent
+  os == "win" && os_version == "6.1" # Skip on Azure - frequent failure
+[browser_test_simultaneous_normal_and_history_loads.js]
+skip-if = !sessionHistoryInParent # The test is for the new session history
diff --git a/docshell/test/navigation/browser_bug1757458.js b/docshell/test/navigation/browser_bug1757458.js
new file mode 100644
index 0000000000..cc9504ac1c
--- /dev/null
+++ b/docshell/test/navigation/browser_bug1757458.js
@@ -0,0 +1,46 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+add_task(async function () {
+  let testPage =
+    getRootDirectory(gTestPath).replace(
+      "chrome://mochitests/content",
+      "view-source:http://example.com"
+    ) + "redirect_to_blank.sjs";
+
+  let testPage2 = "data:text/html,<div>Second page</div>";
+  await BrowserTestUtils.withNewTab(
+    { gBrowser, url: testPage },
+    async function (browser) {
+      await ContentTask.spawn(browser, [], async () => {
+        Assert.ok(
+          content.document.getElementById("viewsource").localName == "body",
+          "view-source document's body should have id='viewsource'."
+        );
+        content.document
+          .getElementById("viewsource")
+          .setAttribute("onunload", "/* disable bfcache*/");
+      });
+
+      BrowserTestUtils.loadURIString(browser, testPage2);
+      await BrowserTestUtils.browserLoaded(browser);
+
+      let pageShownPromise = BrowserTestUtils.waitForContentEvent(
+        browser,
+        "pageshow",
+        true
+      );
+      browser.browsingContext.goBack();
+      await pageShownPromise;
+
+      await ContentTask.spawn(browser, [], async () => {
+        Assert.ok(
+          content.document.getElementById("viewsource").localName == "body",
+          "view-source document's body should have id='viewsource'."
+        );
+      });
+    }
+  );
+});
diff --git a/docshell/test/navigation/browser_bug343515.js b/docshell/test/navigation/browser_bug343515.js
new file mode 100644
index 0000000000..722b1bc018
--- /dev/null
+++ b/docshell/test/navigation/browser_bug343515.js
@@ -0,0 +1,276 @@
+// Test for bug 343515 - Need API for tabbrowsers to tell docshells they're visible/hidden
+
+// Globals
+var testPath = "http://mochi.test:8888/browser/docshell/test/navigation/";
+var ctx = {};
+
+add_task(async function () {
+  // Step 1.
+
+  // Get a handle on the initial tab
+  ctx.tab0 = gBrowser.selectedTab;
+  ctx.tab0Browser = gBrowser.getBrowserForTab(ctx.tab0);
+
+  await BrowserTestUtils.waitForCondition(
+    () => ctx.tab0Browser.docShellIsActive,
+    "Timed out waiting for initial tab to be active."
+  );
+
+  // Open a New Tab
+  ctx.tab1 = BrowserTestUtils.addTab(gBrowser, testPath + "bug343515_pg1.html");
+  ctx.tab1Browser = gBrowser.getBrowserForTab(ctx.tab1);
+  await BrowserTestUtils.browserLoaded(ctx.tab1Browser);
+
+  // Step 2.
+  is(
+    testPath + "bug343515_pg1.html",
+    ctx.tab1Browser.currentURI.spec,
+    "Got expected tab 1 url in step 2"
+  );
+
+  // Our current tab should still be active
+  ok(ctx.tab0Browser.docShellIsActive, "Tab 0 should still be active");
+  ok(!ctx.tab1Browser.docShellIsActive, "Tab 1 should not be active");
+
+  // Switch to tab 1
+  await BrowserTestUtils.switchTab(gBrowser, ctx.tab1);
+
+  // Tab 1 should now be active
+  ok(!ctx.tab0Browser.docShellIsActive, "Tab 0 should be inactive");
+  ok(ctx.tab1Browser.docShellIsActive, "Tab 1 should be active");
+
+  // Open another tab
+  ctx.tab2 = BrowserTestUtils.addTab(gBrowser, testPath + "bug343515_pg2.html");
+  ctx.tab2Browser = gBrowser.getBrowserForTab(ctx.tab2);
+
+  await BrowserTestUtils.browserLoaded(ctx.tab2Browser);
+
+  // Step 3.
+  is(
+    testPath + "bug343515_pg2.html",
+    ctx.tab2Browser.currentURI.spec,
+    "Got expected tab 2 url in step 3"
+  );
+
+  // Tab 0 should be inactive, Tab 1 should be active
+  ok(!ctx.tab0Browser.docShellIsActive, "Tab 0 should be inactive");
+  ok(ctx.tab1Browser.docShellIsActive, "Tab 1 should be active");
+
+  // Tab 2's window _and_ its iframes should be inactive
+  ok(!ctx.tab2Browser.docShellIsActive, "Tab 2 should be inactive");
+
+  await SpecialPowers.spawn(ctx.tab2Browser, [], async function () {
+    Assert.equal(content.frames.length, 2, "Tab 2 should have 2 iframes");
+    for (var i = 0; i < content.frames.length; i++) {
+      info("step 3, frame " + i + " info: " + content.frames[i].location);
+      let bc = content.frames[i].browsingContext;
+      Assert.ok(!bc.isActive, `Tab2 iframe ${i} should be inactive`);
+    }
+  });
+
+  // Navigate tab 2 to a different page
+  BrowserTestUtils.loadURIString(
+    ctx.tab2Browser,
+    testPath + "bug343515_pg3.html"
+  );
+
+  await BrowserTestUtils.browserLoaded(ctx.tab2Browser);
+
+  // Step 4.
+
+  async function checkTab2Active(outerExpected) {
+    await SpecialPowers.spawn(
+      ctx.tab2Browser,
+      [outerExpected],
+      async function (expected) {
+        function isActive(aWindow) {
+          var docshell = aWindow.docShell;
+          info(`checking ${docshell.browsingContext.id}`);
+          return docshell.browsingContext.isActive;
+        }
+
+        let active = expected ? "active" : "inactive";
+        Assert.equal(content.frames.length, 2, "Tab 2 should have 2 iframes");
+        for (var i = 0; i < content.frames.length; i++) {
+          info("step 4, frame " + i + " info: " + content.frames[i].location);
+        }
+        Assert.equal(
+          content.frames[0].frames.length,
+          1,
+          "Tab 2 iframe 0 should have 1 iframes"
+        );
+        Assert.equal(
+          isActive(content.frames[0]),
+          expected,
+          `Tab2 iframe 0 should be ${active}`
+        );
+        Assert.equal(
+          isActive(content.frames[0].frames[0]),
+          expected,
+          `Tab2 iframe 0 subiframe 0 should be ${active}`
+        );
+        Assert.equal(
+          isActive(content.frames[1]),
+          expected,
+          `Tab2 iframe 1 should be ${active}`
+        );
+      }
+    );
+  }
+
+  is(
+    testPath + "bug343515_pg3.html",
+    ctx.tab2Browser.currentURI.spec,
+    "Got expected tab 2 url in step 4"
+  );
+
+  // Tab 0 should be inactive, Tab 1 should be active
+  ok(!ctx.tab0Browser.docShellIsActive, "Tab 0 should be inactive");
+  ok(ctx.tab1Browser.docShellIsActive, "Tab 1 should be active");
+
+  // Tab2 and all descendants should be inactive
+  await checkTab2Active(false);
+
+  // Switch to Tab 2
+  await BrowserTestUtils.switchTab(gBrowser, ctx.tab2);
+
+  // Check everything
+  ok(!ctx.tab0Browser.docShellIsActive, "Tab 0 should be inactive");
+  ok(!ctx.tab1Browser.docShellIsActive, "Tab 1 should be inactive");
+  ok(ctx.tab2Browser.docShellIsActive, "Tab 2 should be active");
+
+  await checkTab2Active(true);
+
+  // Go back
+  let backDone = BrowserTestUtils.waitForLocationChange(
+    gBrowser,
+    testPath + "bug343515_pg2.html"
+  );
+  ctx.tab2Browser.goBack();
+  await backDone;
+
+  // Step 5.
+
+  // Check everything
+  ok(!ctx.tab0Browser.docShellIsActive, "Tab 0 should be inactive");
+  ok(!ctx.tab1Browser.docShellIsActive, "Tab 1 should be inactive");
+  ok(ctx.tab2Browser.docShellIsActive, "Tab 2 should be active");
+  is(
+    testPath + "bug343515_pg2.html",
+    ctx.tab2Browser.currentURI.spec,
+    "Got expected tab 2 url in step 5"
+  );
+
+  await SpecialPowers.spawn(ctx.tab2Browser, [], async function () {
+    for (var i = 0; i < content.frames.length; i++) {
+      let bc = content.frames[i].browsingContext;
+      Assert.ok(bc.isActive, `Tab2 iframe ${i} should be active`);
+    }
+  });
+
+  // Switch to tab 1
+  await BrowserTestUtils.switchTab(gBrowser, ctx.tab1);
+
+  // Navigate to page 3
+  BrowserTestUtils.loadURIString(
+    ctx.tab1Browser,
+    testPath + "bug343515_pg3.html"
+  );
+
+  await BrowserTestUtils.browserLoaded(ctx.tab1Browser);
+
+  // Step 6.
+
+  // Check everything
+  ok(!ctx.tab0Browser.docShellIsActive, "Tab 0 should be inactive");
+  ok(ctx.tab1Browser.docShellIsActive, "Tab 1 should be active");
+  is(
+    testPath + "bug343515_pg3.html",
+    ctx.tab1Browser.currentURI.spec,
+    "Got expected tab 1 url in step 6"
+  );
+
+  await SpecialPowers.spawn(ctx.tab1Browser, [], async function () {
+    function isActive(aWindow) {
+      var docshell = aWindow.docShell;
+      info(`checking ${docshell.browsingContext.id}`);
+      return docshell.browsingContext.isActive;
+    }
+
+    Assert.ok(isActive(content.frames[0]), "Tab1 iframe 0 should be active");
+    Assert.ok(
+      isActive(content.frames[0].frames[0]),
+      "Tab1 iframe 0 subiframe 0 should be active"
+    );
+    Assert.ok(isActive(content.frames[1]), "Tab1 iframe 1 should be active");
+  });
+
+  ok(!ctx.tab2Browser.docShellIsActive, "Tab 2 should be inactive");
+
+  await SpecialPowers.spawn(ctx.tab2Browser, [], async function () {
+    for (var i = 0; i < content.frames.length; i++) {
+      let bc = content.frames[i].browsingContext;
+      Assert.ok(!bc.isActive, `Tab2 iframe ${i} should be inactive`);
+    }
+  });
+
+  // Go forward on tab 2
+  let forwardDone = BrowserTestUtils.waitForLocationChange(
+    gBrowser,
+    testPath + "bug343515_pg3.html"
+  );
+  ctx.tab2Browser.goForward();
+  await forwardDone;
+
+  // Step 7.
+
+  async function checkBrowser(browser, outerTabNum, outerActive) {
+    let data = { tabNum: outerTabNum, active: outerActive };
+    await SpecialPowers.spawn(
+      browser,
+      [data],
+      async function ({ tabNum, active }) {
+        function isActive(aWindow) {
+          var docshell = aWindow.docShell;
+          info(`checking ${docshell.browsingContext.id}`);
+          return docshell.browsingContext.isActive;
+        }
+
+        let activestr = active ? "active" : "inactive";
+        Assert.equal(
+          isActive(content.frames[0]),
+          active,
+          `Tab${tabNum} iframe 0 should be ${activestr}`
+        );
+        Assert.equal(
+          isActive(content.frames[0].frames[0]),
+          active,
+          `Tab${tabNum} iframe 0 subiframe 0 should be ${activestr}`
+        );
+        Assert.equal(
+          isActive(content.frames[1]),
+          active,
+          `Tab${tabNum} iframe 1 should be ${activestr}`
+        );
+      }
+    );
+  }
+
+  // Check everything
+  ok(!ctx.tab0Browser.docShellIsActive, "Tab 0 should be inactive");
+  ok(ctx.tab1Browser.docShellIsActive, "Tab 1 should be active");
+  is(
+    testPath + "bug343515_pg3.html",
+    ctx.tab2Browser.currentURI.spec,
+    "Got expected tab 2 url in step 7"
+  );
+
+  await checkBrowser(ctx.tab1Browser, 1, true);
+
+  ok(!ctx.tab2Browser.docShellIsActive, "Tab 2 should be inactive");
+  await checkBrowser(ctx.tab2Browser, 2, false);
+
+  // Close the tabs we made
+  BrowserTestUtils.removeTab(ctx.tab1);
+  BrowserTestUtils.removeTab(ctx.tab2);
+});
diff --git a/docshell/test/navigation/browser_ghistorymaxsize_is_0.js b/docshell/test/navigation/browser_ghistorymaxsize_is_0.js
new file mode 100644
index 0000000000..43c36bbaf2
--- /dev/null
+++ b/docshell/test/navigation/browser_ghistorymaxsize_is_0.js
@@ -0,0 +1,82 @@
+add_task(async function () {
+  // The urls don't really matter as long as they are of the same origin
+  var URL =
+    "http://mochi.test:8888/browser/docshell/test/navigation/bug343515_pg1.html";
+  var URL2 =
+    "http://mochi.test:8888/browser/docshell/test/navigation/bug343515_pg3_1.html";
+
+  // We want to test a specific code path that leads to this call
+  // https://searchfox.org/mozilla-central/rev/e7c61f4a68b974d5fecd216dc7407b631a24eb8f/docshell/base/nsDocShell.cpp#10795
+  // when gHistoryMaxSize is 0 and mIndex and mRequestedIndex are -1
+
+  // 1. Navigate to URL
+  await BrowserTestUtils.withNewTab(
+    { gBrowser, url: URL },
+    async function (browser) {
+      // At this point, we haven't set gHistoryMaxSize to 0, and it is still 50 (default value).
+      if (SpecialPowers.Services.appinfo.sessionHistoryInParent) {
+        let sh = browser.browsingContext.sessionHistory;
+        is(
+          sh.count,
+          1,
+          "We should have entry in session history because we haven't changed gHistoryMaxSize to be 0 yet"
+        );
+        is(
+          sh.index,
+          0,
+          "Shistory's current index should be 0 because we haven't purged history yet"
+        );
+      } else {
+        await ContentTask.spawn(browser, null, () => {
+          var sh = content.window.docShell.QueryInterface(Ci.nsIWebNavigation)
+            .sessionHistory.legacySHistory;
+          is(
+            sh.count,
+            1,
+            "We should have entry in session history because we haven't changed gHistoryMaxSize to be 0 yet"
+          );
+          is(
+            sh.index,
+            0,
+            "Shistory's current index should be 0 because we haven't purged history yet"
+          );
+        });
+      }
+
+      var loadPromise = BrowserTestUtils.browserLoaded(browser, false, URL2);
+      // If we set the pref at the beginning of this page, then when we launch a child process
+      // to navigate to URL in Step 1, because of
+      // https://searchfox.org/mozilla-central/rev/e7c61f4a68b974d5fecd216dc7407b631a24eb8f/docshell/shistory/nsSHistory.cpp#308-312
+      // this pref will be set to the default value (currently 50). Setting this pref after the child process launches
+      // is a robust way to make sure it stays 0
+      await SpecialPowers.pushPrefEnv({
+        set: [["browser.sessionhistory.max_entries", 0]],
+      });
+      // 2. Navigate to URL2
+      // We are navigating to a page with the same origin so that we will stay in the same process
+      BrowserTestUtils.loadURIString(browser, URL2);
+      await loadPromise;
+
+      // 3. Reload the browser with specific flags so that we end up here
+      // https://searchfox.org/mozilla-central/rev/e7c61f4a68b974d5fecd216dc7407b631a24eb8f/docshell/base/nsDocShell.cpp#10795
+      var promise = BrowserTestUtils.browserLoaded(browser);
+      browser.reloadWithFlags(Ci.nsIWebNavigation.LOAD_FLAGS_BYPASS_CACHE);
+      await promise;
+
+      if (SpecialPowers.Services.appinfo.sessionHistoryInParent) {
+        let sh = browser.browsingContext.sessionHistory;
+        is(sh.count, 0, "We should not save any entries in session history");
+        is(sh.index, -1);
+        is(sh.requestedIndex, -1);
+      } else {
+        await ContentTask.spawn(browser, null, () => {
+          var sh = content.window.docShell.QueryInterface(Ci.nsIWebNavigation)
+            .sessionHistory.legacySHistory;
+          is(sh.count, 0, "We should not save any entries in session history");
+          is(sh.index, -1);
+          is(sh.requestedIndex, -1);
+        });
+      }
+    }
+  );
+});
diff --git a/docshell/test/navigation/browser_test-content-chromeflags.js b/docshell/test/navigation/browser_test-content-chromeflags.js
new file mode 100644
index 0000000000..ab1ae41c0c
--- /dev/null
+++ b/docshell/test/navigation/browser_test-content-chromeflags.js
@@ -0,0 +1,54 @@
+const TEST_PAGE = `data:text/html,<html><body><a href="about:blank" target="_blank">Test</a></body></html>`;
+const { CHROME_ALL, CHROME_REMOTE_WINDOW, CHROME_FISSION_WINDOW } =
+  Ci.nsIWebBrowserChrome;
+
+/**
+ * Tests that when we open new browser windows from content they
+ * get the full browser chrome.
+ */
+add_task(async function () {
+  // Make sure that the window.open call will open a new
+  // window instead of a new tab.
+  await new Promise(resolve => {
+    SpecialPowers.pushPrefEnv(
+      {
+        set: [["browser.link.open_newwindow", 2]],
+      },
+      resolve
+    );
+  });
+
+  await BrowserTestUtils.withNewTab(
+    {
+      gBrowser,
+      url: TEST_PAGE,
+    },
+    async function (browser) {
+      let openedPromise = BrowserTestUtils.waitForNewWindow();
+      BrowserTestUtils.synthesizeMouse("a", 0, 0, {}, browser);
+      let win = await openedPromise;
+
+      let chromeFlags = win.docShell.treeOwner
+        .QueryInterface(Ci.nsIInterfaceRequestor)
+        .getInterface(Ci.nsIAppWindow).chromeFlags;
+
+      let expected = CHROME_ALL;
+
+      // In the multi-process tab case, the new window will have the
+      // CHROME_REMOTE_WINDOW flag set.
+      if (gMultiProcessBrowser) {
+        expected |= CHROME_REMOTE_WINDOW;
+      }
+
+      // In the multi-process subframe case, the new window will have the
+      // CHROME_FISSION_WINDOW flag set.
+      if (gFissionBrowser) {
+        expected |= CHROME_FISSION_WINDOW;
+      }
+
+      is(chromeFlags, expected, "Window should have opened with all chrome");
+
+      await BrowserTestUtils.closeWindow(win);
+    }
+  );
+});
diff --git a/docshell/test/navigation/browser_test_bfcache_eviction.js b/docshell/test/navigation/browser_test_bfcache_eviction.js
new file mode 100644
index 0000000000..32772fe42c
--- /dev/null
+++ b/docshell/test/navigation/browser_test_bfcache_eviction.js
@@ -0,0 +1,102 @@
+add_task(async function () {
+  // We don't want the number of total viewers to be calculated by the available size
+  // for this test case. Instead, fix the number of viewers.
+  await SpecialPowers.pushPrefEnv({
+    set: [
+      ["browser.sessionhistory.max_total_viewers", 3],
+      ["docshell.shistory.testing.bfevict", true],
+      // If Fission is disabled, the pref is no-op.
+      ["fission.bfcacheInParent", true],
+    ],
+  });
+
+  // 1. Open a tab
+  var testPage =
+    "data:text/html,<html id='html1'><body id='body1'>First tab ever opened</body></html>";
+  await BrowserTestUtils.withNewTab(
+    { gBrowser, url: testPage },
+    async function (browser) {
+      let testDone = {};
+      if (!SpecialPowers.Services.appinfo.sessionHistoryInParent) {
+        // 2.  Add a promise that will be resolved when the 'content viewer evicted' event goes off
+        testDone.promise = SpecialPowers.spawn(browser, [], async function () {
+          return new Promise(resolve => {
+            let webNavigation = content.docShell.QueryInterface(
+              Ci.nsIWebNavigation
+            );
+            let { legacySHistory } = webNavigation.sessionHistory;
+            // 3. Register a session history listener to listen for a 'content viewer evicted' event.
+            let historyListener = {
+              OnContentViewerEvicted() {
+                ok(
+                  true,
+                  "History listener got called after a content viewer was evicted"
+                );
+                legacySHistory.removeSHistoryListener(historyListener);
+                // 6. Resolve the promise when we got our 'content viewer evicted' event
+                resolve();
+              },
+              QueryInterface: ChromeUtils.generateQI([
+                "nsISHistoryListener",
+                "nsISupportsWeakReference",
+              ]),
+            };
+            legacySHistory.addSHistoryListener(historyListener);
+            // Keep the weak shistory listener alive
+            content._testListener = historyListener;
+          });
+        });
+      } else {
+        // 2.  Add a promise that will be resolved when the 'content viewer evicted' event goes off
+        testDone.promise = new Promise(resolve => {
+          testDone.resolve = resolve;
+        });
+        let shistory = browser.browsingContext.sessionHistory;
+        // 3. Register a session history listener to listen for a 'content viewer evicted' event.
+        let historyListener = {
+          OnContentViewerEvicted() {
+            ok(
+              true,
+              "History listener got called after a content viewer was evicted"
+            );
+            shistory.removeSHistoryListener(historyListener);
+            delete window._testListener;
+            // 6. Resolve the promise when we got our 'content viewer evicted' event
+            testDone.resolve();
+          },
+          QueryInterface: ChromeUtils.generateQI([
+            "nsISHistoryListener",
+            "nsISupportsWeakReference",
+          ]),
+        };
+        shistory.addSHistoryListener(historyListener);
+        // Keep the weak shistory listener alive
+        window._testListener = historyListener;
+      }
+
+      // 4. Open a second tab
+      testPage = `data:text/html,<html id='html1'><body id='body1'>I am a second tab!</body></html>`;
+      let tab2 = await BrowserTestUtils.openNewForegroundTab(
+        gBrowser,
+        testPage
+      );
+
+      // 5. Navigate the first tab to 4 different pages.
+      // We should get 1 content viewer evicted because it will be outside of the range.
+      // If we have the following pages in our session history: P1 P2 P3 P4 P5
+      // and we are currently at P5, then P1 is outside of the range
+      // (it is more than 3 entries away from current entry) and thus will be evicted.
+      for (var i = 0; i < 4; i++) {
+        testPage = `data:text/html,<html id='html1'><body id='body1'>${i}</body></html>`;
+        let pagePromise = BrowserTestUtils.browserLoaded(browser);
+        BrowserTestUtils.loadURIString(browser, testPage);
+        await pagePromise;
+      }
+      // 7. Wait for 'content viewer evicted' event to go off
+      await testDone.promise;
+
+      // 8. Close the second tab
+      BrowserTestUtils.removeTab(tab2);
+    }
+  );
+});
diff --git a/docshell/test/navigation/browser_test_shentry_wireframe.js b/docshell/test/navigation/browser_test_shentry_wireframe.js
new file mode 100644
index 0000000000..953a2eb6e2
--- /dev/null
+++ b/docshell/test/navigation/browser_test_shentry_wireframe.js
@@ -0,0 +1,128 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const BUILDER = "http://mochi.test:8888/document-builder.sjs?html=";
+const PAGE_1 = BUILDER + encodeURIComponent(`<html><body>Page 1</body></html>`);
+const PAGE_2 = BUILDER + encodeURIComponent(`<html><body>Page 2</body></html>`);
+
+add_setup(async function () {
+  await SpecialPowers.pushPrefEnv({
+    set: [["browser.history.collectWireframes", true]],
+  });
+});
+
+/**
+ * Test that capturing wireframes on nsISHEntriy's in the parent process
+ * happens at the right times.
+ */
+add_task(async function () {
+  await BrowserTestUtils.withNewTab(PAGE_1, async browser => {
+    let sh = browser.browsingContext.sessionHistory;
+    Assert.equal(
+      sh.count,
+      1,
+      "Got the right SessionHistory entry count after initial tab load."
+    );
+    Assert.ok(
+      !sh.getEntryAtIndex(0).wireframe,
+      "No wireframe for the loaded entry after initial tab load."
+    );
+
+    let loaded = BrowserTestUtils.browserLoaded(browser, false, PAGE_2);
+    BrowserTestUtils.loadURIString(browser, PAGE_2);
+    await loaded;
+
+    Assert.equal(
+      sh.count,
+      2,
+      "Got the right SessionHistory entry count after loading page 2."
+    );
+    Assert.ok(
+      sh.getEntryAtIndex(0).wireframe,
+      "A wireframe was captured for the first entry after loading page 2."
+    );
+    Assert.ok(
+      !sh.getEntryAtIndex(1).wireframe,
+      "No wireframe for the loaded entry after loading page 2."
+    );
+
+    // Now go back
+    loaded = BrowserTestUtils.waitForContentEvent(browser, "pageshow");
+    browser.goBack();
+    await loaded;
+    Assert.ok(
+      sh.getEntryAtIndex(1).wireframe,
+      "A wireframe was captured for the second entry after going back."
+    );
+    Assert.ok(
+      !sh.getEntryAtIndex(0).wireframe,
+      "No wireframe for the loaded entry after going back."
+    );
+
+    // Now forward again
+    loaded = BrowserTestUtils.waitForContentEvent(browser, "pageshow");
+    browser.goForward();
+    await loaded;
+
+    Assert.equal(
+      sh.count,
+      2,
+      "Got the right SessionHistory entry count after going forward again."
+    );
+    Assert.ok(
+      sh.getEntryAtIndex(0).wireframe,
+      "A wireframe was captured for the first entry after going forward again."
+    );
+    Assert.ok(
+      !sh.getEntryAtIndex(1).wireframe,
+      "No wireframe for the loaded entry after going forward again."
+    );
+
+    // And using pushState
+    await SpecialPowers.spawn(browser, [], async () => {
+      content.history.pushState({}, "", "nothing-1.html");
+      content.history.pushState({}, "", "nothing-2.html");
+    });
+
+    Assert.equal(
+      sh.count,
+      4,
+      "Got the right SessionHistory entry count after using pushState."
+    );
+    Assert.ok(
+      sh.getEntryAtIndex(0).wireframe,
+      "A wireframe was captured for the first entry after using pushState."
+    );
+    Assert.ok(
+      sh.getEntryAtIndex(1).wireframe,
+      "A wireframe was captured for the second entry after using pushState."
+    );
+    Assert.ok(
+      sh.getEntryAtIndex(2).wireframe,
+      "A wireframe was captured for the third entry after using pushState."
+    );
+    Assert.ok(
+      !sh.getEntryAtIndex(3).wireframe,
+      "No wireframe for the loaded entry after using pushState."
+    );
+
+    // Now check that wireframes can be written to in case we're restoring
+    // an nsISHEntry from serialization.
+    let wireframe = sh.getEntryAtIndex(2).wireframe;
+    sh.getEntryAtIndex(2).wireframe = null;
+    Assert.equal(
+      sh.getEntryAtIndex(2).wireframe,
+      null,
+      "Successfully cleared wireframe."
+    );
+
+    sh.getEntryAtIndex(3).wireframe = wireframe;
+    Assert.deepEqual(
+      sh.getEntryAtIndex(3).wireframe,
+      wireframe,
+      "Successfully wrote a wireframe to an nsISHEntry."
+    );
+  });
+});
diff --git a/docshell/test/navigation/browser_test_simultaneous_normal_and_history_loads.js b/docshell/test/navigation/browser_test_simultaneous_normal_and_history_loads.js
new file mode 100644
index 0000000000..a400d15466
--- /dev/null
+++ b/docshell/test/navigation/browser_test_simultaneous_normal_and_history_loads.js
@@ -0,0 +1,57 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+add_task(async function test_normal_and_history_loads() {
+  // This test is for the case when session history lives in the parent process.
+  // BFCache is disabled to get more asynchronousness.
+  await SpecialPowers.pushPrefEnv({
+    set: [["fission.bfcacheInParent", false]],
+  });
+
+  let testPage =
+    getRootDirectory(gTestPath).replace(
+      "chrome://mochitests/content",
+      // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+      "http://example.com"
+    ) + "blank.html";
+  await BrowserTestUtils.withNewTab(
+    { gBrowser, url: testPage },
+    async function (browser) {
+      for (let i = 0; i < 2; ++i) {
+        BrowserTestUtils.loadURIString(browser, testPage + "?" + i);
+        await BrowserTestUtils.browserLoaded(browser);
+      }
+
+      let sh = browser.browsingContext.sessionHistory;
+      is(sh.count, 3, "Should have 3 entries in the session history.");
+      is(sh.index, 2, "index should be 2");
+      is(sh.requestedIndex, -1, "requestedIndex should be -1");
+
+      // The following part is racy by definition. It is testing that
+      // eventually requestedIndex should become -1 again.
+      browser.browsingContext.goToIndex(1);
+      let historyLoad = BrowserTestUtils.browserLoaded(browser);
+      /* eslint-disable mozilla/no-arbitrary-setTimeout */
+      await new Promise(r => {
+        setTimeout(r, 10);
+      });
+      browser.browsingContext.loadURI(
+        Services.io.newURI(testPage + "?newload"),
+        {
+          triggeringPrincipal: browser.nodePrincipal,
+        }
+      );
+      let newLoad = BrowserTestUtils.browserLoaded(browser);
+      // Note, the loads are racy.
+      await historyLoad;
+      await newLoad;
+      is(sh.requestedIndex, -1, "requestedIndex should be -1");
+
+      browser.browsingContext.goBack();
+      await BrowserTestUtils.browserLoaded(browser);
+      is(sh.requestedIndex, -1, "requestedIndex should be -1");
+    }
+  );
+});
diff --git a/docshell/test/navigation/bug343515_pg1.html b/docshell/test/navigation/bug343515_pg1.html
new file mode 100644
index 0000000000..a8337c7f70
--- /dev/null
+++ b/docshell/test/navigation/bug343515_pg1.html
@@ -0,0 +1,5 @@
+<html>
+  <head><meta charset="UTF-8"/></head>
+  <body>Page 1
+  </body>
+</html>
diff --git a/docshell/test/navigation/bug343515_pg2.html b/docshell/test/navigation/bug343515_pg2.html
new file mode 100644
index 0000000000..c5f5665de5
--- /dev/null
+++ b/docshell/test/navigation/bug343515_pg2.html
@@ -0,0 +1,7 @@
+<html>
+  <head><meta charset="UTF-8"/></head>
+  <body>Page 2
+    <iframe src="data:text/html;charset=UTF8,<html><head></head><body>pg2 iframe 0</body></html>"></iframe>
+    <iframe src="data:text/html;charset=UTF8,<html><head></head><body>pg2 iframe 1</body></html>"></iframe>
+  </body>
+</html>
diff --git a/docshell/test/navigation/bug343515_pg3.html b/docshell/test/navigation/bug343515_pg3.html
new file mode 100644
index 0000000000..fdc79fbf7a
--- /dev/null
+++ b/docshell/test/navigation/bug343515_pg3.html
@@ -0,0 +1,7 @@
+<html>
+  <head><meta charset="UTF-8"/></head>
+  <body>Page 3
+    <iframe src="bug343515_pg3_1.html"></iframe>
+    <iframe src="bug343515_pg3_2.html"></iframe>
+  </body>
+</html>
diff --git a/docshell/test/navigation/bug343515_pg3_1.html b/docshell/test/navigation/bug343515_pg3_1.html
new file mode 100644
index 0000000000..254164c9f0
--- /dev/null
+++ b/docshell/test/navigation/bug343515_pg3_1.html
@@ -0,0 +1,6 @@
+<html>
+  <head><meta charset="UTF-8"/></head>
+  <body>pg3 - iframe 0
+    <iframe src="bug343515_pg3_1_1.html"></iframe>
+  </body>
+</html>
diff --git a/docshell/test/navigation/bug343515_pg3_1_1.html b/docshell/test/navigation/bug343515_pg3_1_1.html
new file mode 100644
index 0000000000..be05b74888
--- /dev/null
+++ b/docshell/test/navigation/bug343515_pg3_1_1.html
@@ -0,0 +1 @@
+<html><head><meta charset="UTF-8"/></head><body>How far does the rabbit hole go?</body></html>
diff --git a/docshell/test/navigation/bug343515_pg3_2.html b/docshell/test/navigation/bug343515_pg3_2.html
new file mode 100644
index 0000000000..7655eb526d
--- /dev/null
+++ b/docshell/test/navigation/bug343515_pg3_2.html
@@ -0,0 +1 @@
+<html><head><meta charset="UTF-8"/></head><body>pg3 iframe 1</body></html>
diff --git a/docshell/test/navigation/cache_control_max_age_3600.sjs b/docshell/test/navigation/cache_control_max_age_3600.sjs
new file mode 100644
index 0000000000..49b6439c9f
--- /dev/null
+++ b/docshell/test/navigation/cache_control_max_age_3600.sjs
@@ -0,0 +1,20 @@
+function handleRequest(request, response) {
+  let query = request.queryString;
+  let action =
+    query == "initial"
+      ? "cache_control_max_age_3600.sjs?second"
+      : "goback.html";
+  response.setHeader("Content-Type", "text/html", false);
+  response.setHeader("Cache-Control", "max-age=3600");
+  response.write(
+    "<html><head><script>window.blockBFCache = new RTCPeerConnection();</script></head>" +
+      '<body onload=\'opener.postMessage("loaded", "*")\'>' +
+      "<div id='content'>" +
+      new Date().getTime() +
+      "</div>" +
+      "<form action='" +
+      action +
+      "' method='POST'></form>" +
+      "</body></html>"
+  );
+}
diff --git a/docshell/test/navigation/file_beforeunload_and_bfcache.html b/docshell/test/navigation/file_beforeunload_and_bfcache.html
new file mode 100644
index 0000000000..5c5aea2918
--- /dev/null
+++ b/docshell/test/navigation/file_beforeunload_and_bfcache.html
@@ -0,0 +1,31 @@
+<html>
+  <head>
+    <script>
+    onpageshow = function(pageShowEvent) {
+      var bc = new BroadcastChannel("beforeunload_and_bfcache");
+      bc.onmessage = function(event) {
+        if (event.data == "nextpage") {
+          bc.close();
+          location.href += "?nextpage";
+        } else if (event.data == "back") {
+          bc.close();
+          history.back();
+        } else if (event.data == "forward") {
+          onbeforeunload = function() {
+            bc.postMessage("beforeunload");
+            bc.close();
+          }
+          history.forward();
+        } else if (event.data == "close") {
+          bc.postMessage("closed");
+          bc.close();
+          window.close();
+        }
+      };
+      bc.postMessage({type: pageShowEvent.type, persisted: pageShowEvent.persisted});
+    };
+    </script>
+  </head>
+  <body>
+  </body>
+</html>
diff --git a/docshell/test/navigation/file_blockBFCache.html b/docshell/test/navigation/file_blockBFCache.html
new file mode 100644
index 0000000000..dc743cdc67
--- /dev/null
+++ b/docshell/test/navigation/file_blockBFCache.html
@@ -0,0 +1,33 @@
+<script>
+let keepAlive;
+window.onpageshow = (pageShow) => {
+  let bc = new BroadcastChannel("bfcache_blocking");
+
+  bc.onmessage = async function(m) {
+    switch(m.data.message) {
+      case "load":
+        bc.close();
+        location.href = m.data.url;
+        break;
+      case "runScript":
+        let test = new Function(`return ${m.data.fun};`)();
+        keepAlive = await test.call(window);
+        bc.postMessage({ type: "runScriptDone" });
+        break;
+      case "back":
+        bc.close();
+        history.back();
+        break;
+      case "forward":
+        bc.close();
+        history.forward();
+        break;
+      case "close":
+        window.close();
+        break;
+    }
+  };
+
+  bc.postMessage({ type: pageShow.type, persisted: pageShow.persisted })
+};
+</script>
diff --git a/docshell/test/navigation/file_bug1300461.html b/docshell/test/navigation/file_bug1300461.html
new file mode 100644
index 0000000000..d7abe8be90
--- /dev/null
+++ b/docshell/test/navigation/file_bug1300461.html
@@ -0,0 +1,61 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta http-equiv="content-type" content="text/html; charset=utf-8">
+    <title>Bug 1300461</title>
+  </head>
+  <body onload="test();">
+    <script>
+      /**
+       * Bug 1300461 identifies that if a history entry was not bfcached, and
+       * a http redirection happens when navigating to that entry, the history
+       * index would mess up.
+       *
+       * The test case emulates the circumstance by the following steps
+       * 1) Navigate to file_bug1300461_back.html which is not bf-cachable.
+       * 2) In file_bug1300461_back.html, replace its own history state to
+       *    file_bug1300461_redirect.html.
+       * 3) Back, and then forward. Since the document is not in bfcache, it
+       *    tries to load file_bug1300461_redirect.html directly.
+       * 4) file_bug1300461_redirect.html redirects UA to
+       *    file_bug1300461_back.html through HTTP 301 header.
+       *
+       * We verify the history index, canGoBack, canGoForward, etc. keep correct
+       * in this process.
+       */
+      let Ci = SpecialPowers.Ci;
+      let webNav = SpecialPowers.wrap(window)
+                     .docShell
+                     .QueryInterface(Ci.nsIWebNavigation);
+      let shistory = webNav.sessionHistory;
+      let testSteps = [
+        function() {
+          opener.is(shistory.count, 1, "check history length");
+          opener.is(shistory.index, 0, "check history index");
+          opener.ok(!webNav.canGoForward, "check canGoForward");
+          setTimeout(() => window.location = "file_bug1300461_back.html", 0);
+        },
+        function() {
+          opener.is(shistory.count, 2, "check history length");
+          opener.is(shistory.index, 0, "check history index");
+          opener.ok(webNav.canGoForward, "check canGoForward");
+          window.history.forward();
+        },
+        function() {
+          opener.is(shistory.count, 2, "check history length");
+          opener.is(shistory.index, 0, "check history index");
+          opener.ok(webNav.canGoForward, "check canGoForward");
+          opener.info("file_bug1300461.html tests finished");
+          opener.finishTest();
+        },
+      ];
+
+      function test() {
+        if (opener) {
+          opener.info("file_bug1300461.html test " + opener.testCount);
+          testSteps[opener.testCount++]();
+        }
+      }
+    </script>
+  </body>
+</html>
diff --git a/docshell/test/navigation/file_bug1300461_back.html b/docshell/test/navigation/file_bug1300461_back.html
new file mode 100644
index 0000000000..3ec431c7c1
--- /dev/null
+++ b/docshell/test/navigation/file_bug1300461_back.html
@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta http-equiv="content-type" content="text/html; charset=utf-8">
+    <title>Bug 1300461</title>
+  </head>
+  <!-- The empty unload handler is to prevent bfcache. -->
+  <body onload="test();" onunload="">
+    <script>
+      let Ci = SpecialPowers.Ci;
+      let webNav = SpecialPowers.wrap(window)
+                                .docShell
+                                .QueryInterface(Ci.nsIWebNavigation);
+      let shistory = webNav.sessionHistory;
+      async function test() {
+        if (opener) {
+          opener.info("file_bug1300461_back.html");
+          opener.is(shistory.count, 2, "check history length");
+          opener.is(shistory.index, 1, "check history index");
+          if (!SpecialPowers.Services.appinfo.sessionHistoryInParent) {
+            opener.is(shistory.legacySHistory.requestedIndex, -1, "check requestedIndex");
+          } else {
+            let index = await opener.getSHRequestedIndex(SpecialPowers.wrap(window).browsingContext.id);
+            opener.is(index, -1, "check requestedIndex");
+          }
+
+          opener.ok(webNav.canGoBack, "check canGoBack");
+          if (opener.testCount == 1) {
+            opener.info("replaceState to redirect.html");
+            window.history.replaceState({}, "", "file_bug1300461_redirect.html");
+          }
+          window.history.back();
+        }
+      }
+    </script>
+  </body>
+</html>
diff --git a/docshell/test/navigation/file_bug1300461_redirect.html b/docshell/test/navigation/file_bug1300461_redirect.html
new file mode 100644
index 0000000000..979530c5cf
--- /dev/null
+++ b/docshell/test/navigation/file_bug1300461_redirect.html
@@ -0,0 +1,10 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta http-equiv="content-type" content="text/html; charset=utf-8">
+    <title>Bug 1300461</title>
+  </head>
+  <body>
+    Redirect to file_bug1300461_back.html.
+  </body>
+</html>
diff --git a/docshell/test/navigation/file_bug1300461_redirect.html^headers^ b/docshell/test/navigation/file_bug1300461_redirect.html^headers^
new file mode 100644
index 0000000000..241b891826
--- /dev/null
+++ b/docshell/test/navigation/file_bug1300461_redirect.html^headers^
@@ -0,0 +1,2 @@
+HTTP 301 Moved Permanently
+Location: file_bug1300461_back.html
diff --git a/docshell/test/navigation/file_bug1326251.html b/docshell/test/navigation/file_bug1326251.html
new file mode 100644
index 0000000000..57a81f46f1
--- /dev/null
+++ b/docshell/test/navigation/file_bug1326251.html
@@ -0,0 +1,212 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Bug 1326251</title>
+    <script>
+    var bc = new BroadcastChannel("file_bug1326251");
+    bc.onmessage = function(event) {
+      if ("nextTest" in event.data) {
+        testSteps[event.data.nextTest]();
+      }
+    }
+
+    function is(val1, val2, msg) {
+      bc.postMessage({type: "is", value1: val1, value2: val2, message: msg});
+    }
+
+    function ok(val, msg) {
+      bc.postMessage({type: "ok", value: val, message: msg});
+    }
+
+    const BASE_URL = "http://mochi.test:8888/tests/docshell/test/navigation/";
+    let testSteps = [
+      async function() {
+        // Test 1: Create dynamic iframe with bfcache enabled.
+        // Navigate static / dynamic iframes, then navigate top level window
+        // and navigate back. Both iframes should still exist with history
+        // entries preserved.
+        window.onunload = null; // enable bfcache
+        await createDynamicFrame(document);
+        await loadUriInFrame(document.getElementById("staticFrame"), "frame1.html");
+        await loadUriInFrame(document.getElementById("dynamicFrame"), "frame1.html");
+        await loadUriInFrame(document.getElementById("staticFrame"), "frame2.html");
+        await loadUriInFrame(document.getElementById("dynamicFrame"), "frame2.html");
+        is(history.length, 5, "history.length");
+        window.location = "goback.html";
+      },
+      async function() {
+        let webNav = SpecialPowers.wrap(window)
+                       .docShell
+                       .QueryInterface(SpecialPowers.Ci.nsIWebNavigation);
+        let shistory = webNav.sessionHistory;
+        is(webNav.canGoForward, true, "canGoForward");
+        is(shistory.index, 4, "shistory.index");
+        is(history.length, 6, "history.length");
+        is(document.getElementById("staticFrame").contentWindow.location.href, BASE_URL + "frame2.html", "staticFrame location");
+        is(document.getElementById("dynamicFrame").contentWindow.location.href, BASE_URL + "frame2.html", "dynamicFrame location");
+
+        // Test 2: Load another page in dynamic iframe, canGoForward should be
+        // false.
+        await loadUriInFrame(document.getElementById("dynamicFrame"), "frame3.html");
+        is(webNav.canGoForward, false, "canGoForward");
+        is(shistory.index, 5, "shistory.index");
+        is(history.length, 6, "history.length");
+
+        // Test 3: Navigate to antoher page with bfcache disabled, all dynamic
+        // iframe entries should be removed.
+        window.onunload = function() {}; // disable bfcache
+        window.location = "goback.html";
+      },
+      async function() {
+        let windowWrap = SpecialPowers.wrap(window);
+        let docShell = windowWrap.docShell;
+        let shistory = docShell.QueryInterface(SpecialPowers.Ci.nsIWebNavigation)
+                               .sessionHistory;
+        // Now staticFrame has frame0 -> frame1 -> frame2.
+        if (!SpecialPowers.Services.appinfo.sessionHistoryInParent) {
+          // *EntryIndex attributes aren't meaningful when the session history
+          // lives in the parent process.
+          is(docShell.previousEntryIndex, 3, "docShell.previousEntryIndex");
+          is(docShell.loadedEntryIndex, 2, "docShell.loadedEntryIndex");
+        }
+        is(shistory.index, 2, "shistory.index");
+        is(history.length, 4, "history.length");
+        is(document.getElementById("staticFrame").contentWindow.location.href, BASE_URL + "frame2.html", "staticFrame location");
+        ok(!document.getElementById("dynamicFrame"), "dynamicFrame should not exist");
+
+        // Test 4: Load a nested frame in the static frame, navigate the inner
+        // static frame, add a inner dynamic frame and navigate the dynamic
+        // frame. Then navigate the outer static frame and go back. The inner
+        // iframe should show the last entry of inner static frame.
+        let staticFrame = document.getElementById("staticFrame");
+        staticFrame.width = "320px";
+        staticFrame.height = "360px";
+        await loadUriInFrame(staticFrame, "iframe_static.html");
+        let innerStaticFrame = staticFrame.contentDocument.getElementById("staticFrame");
+        await loadUriInFrame(innerStaticFrame, "frame1.html");
+        let innerDynamicFrame = await createDynamicFrame(staticFrame.contentDocument, "frame2.html");
+        await loadUriInFrame(innerDynamicFrame, "frame3.html");
+        // staticFrame:       frame0 -> frame1 -> frame2 -> iframe_static
+        // innerStaticFrame:                                frame0        -> frame1
+        // innerDynamicFrame:                                                frame2 -> frame3
+        is(shistory.index, 5, "shistory.index");
+        is(history.length, 6, "history.length");
+
+        // Wait for 2 load events - navigation and goback.
+        let onloadPromise = awaitOnload(staticFrame, 2);
+        await loadUriInFrame(staticFrame, "goback.html");
+        await onloadPromise;
+        // staticFrame:       frame0 -> frame1 -> frame2 -> iframe_static           -> goback
+        // innerStaticFrame:                                frame0        -> frame1
+        is(shistory.index, 4, "shistory.index");
+        is(history.length, 6, "history.length");
+        innerStaticFrame = staticFrame.contentDocument.getElementById("staticFrame");
+        is(innerStaticFrame.contentDocument.location.href, BASE_URL + "frame1.html", "innerStaticFrame location");
+        ok(!staticFrame.contentDocument.getElementById("dynamicFrame"), "innerDynamicFrame should not exist");
+
+        // Test 5: Insert and navigate inner dynamic frame again with bfcache
+        // enabled, and navigate top level window to a special page which will
+        // evict bfcache then goback. Verify that dynamic entries are correctly
+        // removed in this case.
+        window.onunload = null; // enable bfcache
+        staticFrame.width = "320px";
+        staticFrame.height = "360px";
+        innerDynamicFrame = await createDynamicFrame(staticFrame.contentDocument, "frame2.html");
+        await loadUriInFrame(innerDynamicFrame, "frame3.html");
+        // staticFrame:       frame0 -> frame1 -> frame2 -> iframe_static
+        // innerStaticFrame:                                frame0        -> frame1
+        // innerDynamicFrame:                                                frame2 -> frame3
+        is(shistory.index, 5, "shistory.index");
+        is(history.length, 6, "history.length");
+        window.location = "file_bug1326251_evict_cache.html";
+      },
+      async function() {
+        let windowWrap = SpecialPowers.wrap(window);
+        let docShell = windowWrap.docShell;
+        let shistory = docShell.QueryInterface(SpecialPowers.Ci.nsIWebNavigation)
+                               .sessionHistory;
+        // staticFrame:       frame0 -> frame1 -> frame2 -> iframe_static
+        // innerStaticFrame:                                frame0        -> frame1
+        if (!SpecialPowers.Services.appinfo.sessionHistoryInParent) {
+          // *EntryIndex attributes aren't meaningful when the session history
+          // lives in the parent process.
+          is(docShell.previousEntryIndex, 5, "docShell.previousEntryIndex");
+          is(docShell.loadedEntryIndex, 4, "docShell.loadedEntryIndex");
+        }
+        is(shistory.index, 4, "shistory.index");
+        is(history.length, 6, "history.length");
+        let staticFrame = document.getElementById("staticFrame");
+        let innerStaticFrame = staticFrame.contentDocument.getElementById("staticFrame");
+        is(innerStaticFrame.contentDocument.location.href, BASE_URL + "frame1.html", "innerStaticFrame location");
+        ok(!staticFrame.contentDocument.getElementById("dynamicFrame"), "innerDynamicFrame should not exist");
+
+        // Test 6: Insert and navigate inner dynamic frame and then reload outer
+        // frame. Verify that inner dynamic frame entries are all removed.
+        staticFrame.width = "320px";
+        staticFrame.height = "360px";
+        let innerDynamicFrame = await createDynamicFrame(staticFrame.contentDocument, "frame2.html");
+        await loadUriInFrame(innerDynamicFrame, "frame3.html");
+        // staticFrame:       frame0 -> frame1 -> frame2 -> iframe_static
+        // innerStaticFrame:                                frame0        -> frame1
+        // innerDynamicFrame:                                                frame2 -> frame3
+        is(shistory.index, 5, "shistory.index");
+        is(history.length, 6, "history.length");
+        let staticFrameLoadPromise = new Promise(resolve => {
+          staticFrame.onload = resolve;
+        });
+        staticFrame.contentWindow.location.reload();
+        await staticFrameLoadPromise;
+        // staticFrame:       frame0 -> frame1 -> frame2 -> iframe_static
+        // innerStaticFrame:                                frame0        -> frame1
+        is(shistory.index, 4, "shistory.index");
+        is(history.length, 5, "history.length");
+        innerStaticFrame = staticFrame.contentDocument.getElementById("staticFrame");
+        is(innerStaticFrame.contentDocument.location.href, BASE_URL + "frame1.html", "innerStaticFrame location");
+        ok(!staticFrame.contentDocument.getElementById("dynamicFrame"), "innerDynamicFrame should not exist");
+        bc.postMessage("finishTest");
+        bc.close();
+        window.close();
+      },
+    ];
+
+    function awaitOnload(frame, occurances = 1) {
+      return new Promise(function(resolve, reject) {
+        let count = 0;
+        frame.addEventListener("load", function listener(e) {
+          if (++count == occurances) {
+            frame.removeEventListener("load", listener);
+            setTimeout(resolve, 0);
+          }
+        });
+      });
+    }
+
+    async function createDynamicFrame(targetDocument, frameSrc = "frame0.html") {
+      let dynamicFrame = targetDocument.createElement("iframe");
+      let onloadPromise = awaitOnload(dynamicFrame);
+      dynamicFrame.id = "dynamicFrame";
+      dynamicFrame.src = frameSrc;
+      let container = targetDocument.getElementById("frameContainer");
+      container.appendChild(dynamicFrame);
+      await onloadPromise;
+      return dynamicFrame;
+    }
+
+    async function loadUriInFrame(frame, uri) {
+      let onloadPromise = awaitOnload(frame);
+      frame.src = uri;
+      return onloadPromise;
+    }
+
+    function test() {
+      bc.postMessage("requestNextTest");
+    }
+    </script>
+  </head>
+  <body onpageshow="test();">
+    <div id="frameContainer">
+      <iframe id="staticFrame" src="frame0.html"></iframe>
+    </div>
+  </body>
+</html>
diff --git a/docshell/test/navigation/file_bug1326251_evict_cache.html b/docshell/test/navigation/file_bug1326251_evict_cache.html
new file mode 100644
index 0000000000..b9873947f4
--- /dev/null
+++ b/docshell/test/navigation/file_bug1326251_evict_cache.html
@@ -0,0 +1,17 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Bug 1326251</title>
+    <script>
+      // Evict bfcache and then go back.
+      async function evictCache() {
+        await SpecialPowers.evictAllContentViewers();
+
+        history.back();
+      }
+    </script>
+  </head>
+  <body onload="setTimeout(evictCache, 0);">
+  </body>
+</html>
diff --git a/docshell/test/navigation/file_bug1364364-1.html b/docshell/test/navigation/file_bug1364364-1.html
new file mode 100644
index 0000000000..d4ecc42ad4
--- /dev/null
+++ b/docshell/test/navigation/file_bug1364364-1.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>title</title>
+  </head>
+  <body onload="loadFramesAndNavigate();">
+    <p id="content"></p>
+    <div id="frameContainer">
+    </div>
+    <script type="application/javascript">
+    function waitForLoad(frame) {
+      return new Promise(r => frame.onload = () => setTimeout(r, 0));
+    }
+
+    async function loadFramesAndNavigate() {
+      let dynamicFrame = document.createElement("iframe");
+      dynamicFrame.src = "data:text/html,iframe1";
+      document.querySelector("#frameContainer").appendChild(dynamicFrame);
+      await waitForLoad(dynamicFrame);
+      dynamicFrame.src = "data:text/html,iframe2";
+      await waitForLoad(dynamicFrame);
+      dynamicFrame.src = "data:text/html,iframe3";
+      await waitForLoad(dynamicFrame);
+      dynamicFrame.src = "data:text/html,iframe4";
+      await waitForLoad(dynamicFrame);
+      dynamicFrame.src = "data:text/html,iframe5";
+      await waitForLoad(dynamicFrame);
+      location.href = "file_bug1364364-2.html";
+    }
+    </script>
+  </body>
+</html>
diff --git a/docshell/test/navigation/file_bug1364364-2.html b/docshell/test/navigation/file_bug1364364-2.html
new file mode 100644
index 0000000000..6e52ecaaa9
--- /dev/null
+++ b/docshell/test/navigation/file_bug1364364-2.html
@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>title</title>
+  </head>
+  <body onload="notifyOpener();">
+    <script type="application/javascript">
+    function notifyOpener() {
+      opener.postMessage("navigation-done", "*");
+    }
+    </script>
+  </body>
+</html>
diff --git a/docshell/test/navigation/file_bug1375833-frame1.html b/docshell/test/navigation/file_bug1375833-frame1.html
new file mode 100644
index 0000000000..ea38326479
--- /dev/null
+++ b/docshell/test/navigation/file_bug1375833-frame1.html
@@ -0,0 +1,8 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>iframe test page 1</title>
+  </head>
+  <body>iframe test page 1</body>
+</html>
diff --git a/docshell/test/navigation/file_bug1375833-frame2.html b/docshell/test/navigation/file_bug1375833-frame2.html
new file mode 100644
index 0000000000..6e76ab7e47
--- /dev/null
+++ b/docshell/test/navigation/file_bug1375833-frame2.html
@@ -0,0 +1,8 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>iframe test page 2</title>
+  </head>
+  <body>iframe test page 2</body>
+</html>
diff --git a/docshell/test/navigation/file_bug1375833.html b/docshell/test/navigation/file_bug1375833.html
new file mode 100644
index 0000000000..373a7fe08e
--- /dev/null
+++ b/docshell/test/navigation/file_bug1375833.html
@@ -0,0 +1,22 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Test for bug 1375833</title>
+  </head>
+  <body onload="test();">
+    <iframe id="testFrame" src="file_bug1375833-frame1.html"></iframe>
+    <script type="application/javascript">
+    function test() {
+      let iframe = document.querySelector("#testFrame");
+      setTimeout(function() { iframe.src = "file_bug1375833-frame1.html"; }, 0);
+      iframe.onload = function(e) {
+        setTimeout(function() { iframe.src = "file_bug1375833-frame2.html"; }, 0);
+        iframe.onload = function() {
+          opener.postMessage(iframe.contentWindow.location.href, "*");
+        };
+      };
+    }
+    </script>
+  </body>
+</html>
diff --git a/docshell/test/navigation/file_bug1379762-1.html b/docshell/test/navigation/file_bug1379762-1.html
new file mode 100644
index 0000000000..c8cd666667
--- /dev/null
+++ b/docshell/test/navigation/file_bug1379762-1.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Bug 1379762</title>
+  </head>
+  <img srcset> <!-- This tries to add load blockers during bfcache restoration -->
+  <script>
+    onunload = null; // enable bfcache
+    var bc = new BroadcastChannel('bug1379762');
+    bc.postMessage("init"); 
+    onpageshow = function() {
+      bc.onmessage = (messageEvent) => {
+        let message = messageEvent.data;
+        if (message == "forward_back") {
+          // Navigate forward and then back.
+          // eslint-disable-next-line no-global-assign
+          setTimeout(function() { location = "goback.html"; }, 0);
+        } else if (message == "finish_test") {
+          // Do this async so our load event gets a chance to fire if it plans to
+          // do it.
+          setTimeout(function() {
+            bc.postMessage("finished");
+            bc.close();
+            window.close();
+          });
+        }
+      }
+      bc.postMessage("increment_testCount");
+    };
+    onload = function() {
+      bc.postMessage("increment_loadCount");
+    };
+  </script>
+</html>
diff --git a/docshell/test/navigation/file_bug1536471.html b/docshell/test/navigation/file_bug1536471.html
new file mode 100644
index 0000000000..53012257ee
--- /dev/null
+++ b/docshell/test/navigation/file_bug1536471.html
@@ -0,0 +1,8 @@
+<html>
+  <body onload="opener.bodyOnLoad()">
+    Nested Frame
+    <div id="frameContainer">
+      <iframe id="staticFrame" src="frame0.html"></iframe>
+    </div>
+  </body>
+</html>
diff --git a/docshell/test/navigation/file_bug1583110.html b/docshell/test/navigation/file_bug1583110.html
new file mode 100644
index 0000000000..5b08f54d21
--- /dev/null
+++ b/docshell/test/navigation/file_bug1583110.html
@@ -0,0 +1,26 @@
+<html>
+  <head>
+    <script>
+    var bc;
+    window.onpageshow = function(pageshow) {
+      bc = new BroadcastChannel("bug1583110");
+      bc.onmessage = function(event) {
+        bc.close();
+        if (event.data == "loadnext") {
+          location.search = "?nextpage";
+        } else if (event.data == "back") {
+          history.back();
+        }
+      }
+      bc.postMessage({type: "pageshow", persisted: pageshow.persisted });
+      if (pageshow.persisted) {
+        document.body.appendChild(document.createElement("iframe"));
+        bc.close();
+        window.close();
+      }
+    }
+    </script>
+  </head>
+  <body>
+  </body>
+</html>
diff --git a/docshell/test/navigation/file_bug1609475.html b/docshell/test/navigation/file_bug1609475.html
new file mode 100644
index 0000000000..7699d46b08
--- /dev/null
+++ b/docshell/test/navigation/file_bug1609475.html
@@ -0,0 +1,51 @@
+<html>
+  <head>
+    <script>
+
+    var loadCount = 0;
+    function loadListener(event) {
+      ++loadCount;
+      if (loadCount == 2) {
+        // Use a timer to ensure we don't get extra load events.
+        setTimeout(function() {
+          var doc1URI = document.getElementById("i1").contentDocument.documentURI;
+          opener.ok(doc1URI.includes("frame1.html"),
+                    "Should have loaded the initial page to the first iframe. Got " + doc1URI);
+          var doc2URI = document.getElementById("i2").contentDocument.documentURI;
+          opener.ok(doc2URI.includes("frame1.html"),
+                    "Should have loaded the initial page to the second iframe. Got " + doc2URI);
+          opener.finishTest();
+        }, 1000);
+      } else if (loadCount > 2) {
+        opener.ok(false, "Too many load events");
+      }
+      // if we don't get enough load events, the test will time out.
+    }
+
+    function setupIframe(id) {
+      var ifr = document.getElementById(id);
+      return new Promise(function(resolve) {
+        ifr.onload = function() {
+          // Replace load listener to catch page loads from the session history.
+          ifr.onload = loadListener;
+          // Need to use setTimeout, because triggering loads inside
+          // load event listener has special behavior since at the moment
+          // the docshell keeps track of whether it is executing a load handler or not.
+          setTimeout(resolve);
+        }
+        ifr.contentWindow.location.href = "frame2.html";
+      });
+    }
+
+    async function test() {
+      await setupIframe("i1");
+      await setupIframe("i2");
+      history.go(-2);
+    }
+    </script>
+  </head>
+  <body onload="setTimeout(test)">
+    <iframe id="i1" src="frame1.html"></iframe>
+    <iframe id="i2" src="frame1.html"></iframe>
+  </body>
+</html>
\ No newline at end of file
diff --git a/docshell/test/navigation/file_bug1706090.html b/docshell/test/navigation/file_bug1706090.html
new file mode 100644
index 0000000000..9c5bc025d3
--- /dev/null
+++ b/docshell/test/navigation/file_bug1706090.html
@@ -0,0 +1,40 @@
+<html>
+  <head>
+    <script>
+    onpageshow = function(pageShowEvent) {
+      if (location.hostname == "example.com" ||
+          location.hostname == "test1.mochi.test") {
+        // BroadcastChannel doesn't work across domains, so just go to the
+        // previous page explicitly.
+        history.back();
+        return;
+      }
+
+      var bc = new BroadcastChannel("bug1706090");
+      bc.onmessage = function(event) {
+        if (event.data == "close") {
+          bc.postMessage("closed");
+          bc.close();
+          window.close();
+        } else if (event.data == "sameOrigin") {
+          bc.close();
+          location.href = location.href + "?foo"
+        } else if (event.data == "back") {
+          history.back();
+        } else if (event.data == "crossOrigin") {
+          bc.close();
+          location.href = "https://example.com:443" + location.pathname;
+        } else if (event.data == "sameSite") {
+          bc.close();
+          // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+          location.href = "http://test1.mochi.test:8888" + location.pathname;
+        }
+      }
+
+      bc.postMessage({type: pageShowEvent.type, persisted: pageShowEvent.persisted});
+    }
+    </script>
+  </head>
+  <body onunload="/* dummy listener*/">
+  </body>
+</html>
diff --git a/docshell/test/navigation/file_bug1745638.html b/docshell/test/navigation/file_bug1745638.html
new file mode 100644
index 0000000000..b98c8de91f
--- /dev/null
+++ b/docshell/test/navigation/file_bug1745638.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<script>
+  function go() {
+      var doc = document.getElementById("testFrame").contentWindow.document;
+      doc.open();
+      doc.close();
+      doc.body.innerText = "passed";
+  }
+</script>
+<body onload="setTimeout(opener.pageLoaded);">
+The iframe below should not be blank after a reload.<br>
+<iframe src="about:blank" id="testFrame"></iframe>
+<script>
+  go();
+</script>
diff --git a/docshell/test/navigation/file_bug1750973.html b/docshell/test/navigation/file_bug1750973.html
new file mode 100644
index 0000000000..28b2f995ae
--- /dev/null
+++ b/docshell/test/navigation/file_bug1750973.html
@@ -0,0 +1,45 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <script>
+    function test() {
+      history.scrollRestoration = "manual";
+      document.getElementById("initialfocus").focus();
+      history.pushState('data', '', '');
+      history.back();
+    }
+
+    window.onpopstate = function() {
+      window.onscroll = function() {
+        window.onscroll = null;
+        document.documentElement.style.display = "none";
+        // focus() triggers recreation of the nsIFrames without a reflow.
+        document.getElementById("focustarget").focus();
+        document.documentElement.style.display = "";
+        // Flush the layout.
+        document.documentElement.getBoundingClientRect();
+        opener.isnot(window.scrollY, 0, "The page should have been scrolled down(1)");
+        requestAnimationFrame(
+          function() {
+            // Extra timeout to ensure we're called after rAF has triggered a
+            // reflow.
+            setTimeout(function() {
+              opener.isnot(window.scrollY, 0, "The page should have been scrolled down(2)");
+              window.close();
+              opener.SimpleTest.finish();
+            });
+        });
+      }
+      window.scrollTo(0, 1000);
+    }
+  </script>
+</head>
+<body onload="setTimeout(test)">
+<div style="position: fixed;">
+  <input type="button" value="" id="initialfocus">
+  <input type="button" value="" id="focustarget">
+</div>
+<div style="border: 1px solid black; width: 100px; height: 9000px;"></div>
+</body>
+</html>
diff --git a/docshell/test/navigation/file_bug1758664.html b/docshell/test/navigation/file_bug1758664.html
new file mode 100644
index 0000000000..07798dfddd
--- /dev/null
+++ b/docshell/test/navigation/file_bug1758664.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<html>
+<head>
+<script>
+var onIframeOnload = function() {
+    var iframe = window.document.getElementById('applicationIframe');
+    opener.is(iframe.contentWindow.location.search, "?iframe", "Should have loaded the iframe");
+    window.close();
+    opener.SimpleTest.finish();
+}
+
+var onPageOnload = function() {
+    if (location.search == "?iframe") {
+      return;
+    }
+    if(!window.name) {
+        window.name = 'file_bug1758664.html';
+        window.location.reload();
+        return;
+    }
+    var iframe = window.document.getElementById('applicationIframe');
+    iframe.addEventListener('load', onIframeOnload);
+    iframe.src = "file_bug1758664.html?iframe";
+}
+window.document.addEventListener("DOMContentLoaded", onPageOnload);
+
+</script>
+</head>
+<body>
+    <iframe id="applicationIframe"></iframe>
+</body>
+</html>
diff --git a/docshell/test/navigation/file_bug386782_contenteditable.html b/docshell/test/navigation/file_bug386782_contenteditable.html
new file mode 100644
index 0000000000..4515d015d9
--- /dev/null
+++ b/docshell/test/navigation/file_bug386782_contenteditable.html
@@ -0,0 +1 @@
+<html><head><meta charset="utf-8"><script>window.addEventListener("pageshow", function(event) { window.opener.postMessage({persisted: event.persisted}, "*"); });</script></head><body contentEditable="true"><p>contentEditable</p></body></html>
\ No newline at end of file
diff --git a/docshell/test/navigation/file_bug386782_designmode.html b/docshell/test/navigation/file_bug386782_designmode.html
new file mode 100644
index 0000000000..faa063cbae
--- /dev/null
+++ b/docshell/test/navigation/file_bug386782_designmode.html
@@ -0,0 +1 @@
+<html><head><meta charset="utf-8"><script>window.addEventListener("pageshow", function(event) { window.opener.postMessage({persisted: event.persisted}, "*"); });</script></head><body><p>designModeDocument</p></body></html>
\ No newline at end of file
diff --git a/docshell/test/navigation/file_bug462076_1.html b/docshell/test/navigation/file_bug462076_1.html
new file mode 100644
index 0000000000..5050e79fdc
--- /dev/null
+++ b/docshell/test/navigation/file_bug462076_1.html
@@ -0,0 +1,55 @@
+<html>
+  <head>
+    <title>Bug 462076</title>
+    <script>
+      var srcs = [ "frame0.html",
+                   "frame1.html",
+                   "frame2.html",
+                   "frame3.html" ];
+
+      var checkCount = 0;
+
+      function makeFrame(index) {
+        var ifr = document.createElement("iframe");
+        ifr.src = srcs[index];
+        ifr.onload = checkFrame;
+        document.getElementById("container" + index).appendChild(ifr);
+      }
+
+      function runTest() {
+        var randomNumber = Math.floor(Math.random() * 4);
+        for (var i = randomNumber; i < 4; ++i) {
+          makeFrame(i);
+        }
+        for (var k = 0; k < randomNumber; ++k) {
+          makeFrame(k);
+        }
+      }
+
+      function checkFrame(evt) {
+        var ifr = evt.target;
+        opener.ok(String(ifr.contentWindow.location).includes(ifr.src),
+           "Wrong document loaded (" + ifr.src + ", " +
+           ifr.contentWindow.location + ")!");
+
+        if (++checkCount == 4) {
+          if (++opener.testCount == 10) {
+            opener.nextTest();
+            window.close();
+          } else {
+            window.location.reload();
+          }
+        }
+      }
+    </script>
+  </head>
+  <body>
+    <div id="container0"></div>
+    <div id="container1"></div>
+    <div id="container2"></div>
+    <div id="container3"></div>
+    <script>
+      runTest();
+    </script>
+  </body>
+</html>
diff --git a/docshell/test/navigation/file_bug462076_2.html b/docshell/test/navigation/file_bug462076_2.html
new file mode 100644
index 0000000000..63cf3de3f9
--- /dev/null
+++ b/docshell/test/navigation/file_bug462076_2.html
@@ -0,0 +1,52 @@
+<html>
+  <head>
+    <title>Bug 462076</title>
+    <script>
+      var srcs = [ "frame0.html",
+                   "frame1.html",
+                   "frame2.html",
+                   "frame3.html" ];
+
+      var checkCount = 0;
+
+      function makeFrame(index) {
+        var ifr = document.createElement("iframe");
+        ifr.src = srcs[index];
+        ifr.onload = checkFrame;
+        document.getElementById("container" + index).appendChild(ifr);
+      }
+
+      function runTest() {
+        var randomNumber = Math.floor(Math.random() * 4);
+        for (var i = randomNumber; i < 4; ++i) {
+          makeFrame(i);
+        }
+        for (var k = 0; k < randomNumber; ++k) {
+          makeFrame(k);
+        }
+      }
+
+      function checkFrame(evt) {
+        var ifr = evt.target;
+        opener.ok(String(ifr.contentWindow.location).includes(ifr.src),
+           "Wrong document loaded (" + ifr.src + ", " +
+           ifr.contentWindow.location + ")!");
+
+        if (++checkCount == 4) {
+          if (++opener.testCount == 10) {
+            opener.nextTest();
+            window.close();
+          } else {
+            window.location.reload();
+          }
+        }
+      }
+    </script>
+  </head>
+  <body onload="runTest();">
+    <div id="container0"></div>
+    <div id="container1"></div>
+    <div id="container2"></div>
+    <div id="container3"></div>
+  </body>
+</html>
diff --git a/docshell/test/navigation/file_bug462076_3.html b/docshell/test/navigation/file_bug462076_3.html
new file mode 100644
index 0000000000..5c779d2f49
--- /dev/null
+++ b/docshell/test/navigation/file_bug462076_3.html
@@ -0,0 +1,52 @@
+<html>
+  <head>
+    <title>Bug 462076</title>
+    <script>
+      var srcs = [ "frame0.html",
+                   "frame1.html",
+                   "frame2.html",
+                   "frame3.html" ];
+
+      var checkCount = 0;
+
+      function makeFrame(index) {
+        var ifr = document.createElement("iframe");
+        ifr.src = srcs[index];
+        ifr.onload = checkFrame;
+        document.getElementById("container" + index).appendChild(ifr);
+      }
+
+      function runTest() {
+        var randomNumber = Math.floor(Math.random() * 4);
+        for (var i = randomNumber; i < 4; ++i) {
+          makeFrame(i);
+        }
+        for (var k = 0; k < randomNumber; ++k) {
+          makeFrame(k);
+        }
+      }
+
+      function checkFrame(evt) {
+        var ifr = evt.target;
+        opener.ok(String(ifr.contentWindow.location).includes(ifr.src),
+           "Wrong document loaded (" + ifr.src + ", " +
+           ifr.contentWindow.location + ")!");
+
+        if (++checkCount == 4) {
+          if (++opener.testCount == 10) {
+            opener.nextTest();
+            window.close();
+          } else {
+            window.location.reload();
+          }
+        }
+      }
+    </script>
+  </head>
+  <body onload="setTimeout(runTest, 0);">
+    <div id="container0"></div>
+    <div id="container1"></div>
+    <div id="container2"></div>
+    <div id="container3"></div>
+  </body>
+</html>
diff --git a/docshell/test/navigation/file_bug508537_1.html b/docshell/test/navigation/file_bug508537_1.html
new file mode 100644
index 0000000000..182c085670
--- /dev/null
+++ b/docshell/test/navigation/file_bug508537_1.html
@@ -0,0 +1,33 @@
+<html>
+  <head>
+    <script>
+      function dynFrameLoad() {
+        var ifrs = document.getElementsByTagName("iframe");
+        opener.ok(String(ifrs[0].contentWindow.location).includes(ifrs[0].src),
+                  "Wrong document loaded (1)\n");
+        opener.ok(String(ifrs[1].contentWindow.location).includes(ifrs[1].src),
+                  "Wrong document loaded (2)\n");
+        if (opener && ++opener.testCount == 1) {
+          window.location = "goback.html";
+        } else {
+          opener.finishTest();
+        }
+      }
+
+      window.addEventListener("load",
+        function() {
+          var container = document.getElementById("t1");
+          container.addEventListener("load", dynFrameLoad, true);
+          container.appendChild(container.appendChild(document.getElementById("i1")));
+        });
+    </script>
+  </head>
+  <body>
+    <h5>Container:</h5>
+    <div id="t1"></div>
+    <h5>Original frames:</h5>
+    <iframe id="i1" src="frame0.html"></iframe>
+    <iframe src="frame1.html"></iframe>
+  </body>
+</html>
+
diff --git a/docshell/test/navigation/file_bug534178.html b/docshell/test/navigation/file_bug534178.html
new file mode 100644
index 0000000000..4d77dd824b
--- /dev/null
+++ b/docshell/test/navigation/file_bug534178.html
@@ -0,0 +1,30 @@
+<html>
+  <head>
+    <script>
+    
+      function testDone() {
+        document.body.firstChild.remove();
+        var isOK = false;
+        try {
+          isOK = history.previous != location;
+        } catch (ex) {
+          // history.previous should throw if this is the first page in shistory.
+          isOK = true;
+        }
+        document.body.textContent = isOK ? "PASSED" : "FAILED";
+        opener.ok(isOK, "Duplicate session history entries should have been removed!");
+        opener.finishTest();
+      }
+      function ifrload() {
+        setTimeout(testDone, 0);
+      }
+      function test() {
+        var ifr = document.getElementsByTagName("iframe")[0];
+        ifr.onload = ifrload;
+        ifr.src = "data:text/html,doc2";
+      }
+    </script>
+  </head>
+  <body onload="setTimeout(test, 0)"><iframe src="data:text/html,doc1"></iframe>
+  </body>
+</html>
diff --git a/docshell/test/navigation/file_contentpolicy_block_window.html b/docshell/test/navigation/file_contentpolicy_block_window.html
new file mode 100644
index 0000000000..c51e574e5e
--- /dev/null
+++ b/docshell/test/navigation/file_contentpolicy_block_window.html
@@ -0,0 +1,5 @@
+<html>
+<body>
+This window should never be openend!
+</body>
+</html>
diff --git a/docshell/test/navigation/file_docshell_gotoindex.html b/docshell/test/navigation/file_docshell_gotoindex.html
new file mode 100644
index 0000000000..f3e8919822
--- /dev/null
+++ b/docshell/test/navigation/file_docshell_gotoindex.html
@@ -0,0 +1,42 @@
+<html>
+  <head>
+    <script>
+    function loaded() {
+      if (location.search == "") {
+        if (opener.loadedInitialPage) {
+          opener.ok(true, "got back to the initial page.");
+          opener.setTimeout("SimpleTest.finish();");
+          window.close();
+          return;
+        }
+        opener.loadedInitialPage = true;
+        opener.info("Loaded initial page.");
+        // Load another page (which is this same document, but different URL.)
+        location.href = location.href + "?anotherPage";
+      } else {
+        opener.info("Loaded the second page.");
+        location.hash = "1";
+        window.onhashchange = function() {
+          opener.info("hash: " + location.hash);
+          location.hash = "2";
+          window.onhashchange = function() {
+            opener.info("hash: " + location.hash);
+            var docShell = SpecialPowers.wrap(window).docShell;
+            var webNavigation =
+                SpecialPowers.do_QueryInterface(docShell, "nsIWebNavigation");
+            webNavigation.gotoIndex(history.length - 2);
+            window.onhashchange = function() {
+              opener.info("hash: " + location.hash);
+              webNavigation.gotoIndex(history.length - 4);
+            }
+          }
+        }
+      }
+    }
+    </script>
+  </head>
+  <body onpageshow="setTimeout(loaded)">
+    <a href="#1" name="1">1</a>
+    <a href="#2" name="2">2</a>
+  </body>
+</html>
\ No newline at end of file
diff --git a/docshell/test/navigation/file_document_write_1.html b/docshell/test/navigation/file_document_write_1.html
new file mode 100644
index 0000000000..be52b60231
--- /dev/null
+++ b/docshell/test/navigation/file_document_write_1.html
@@ -0,0 +1,18 @@
+<html>
+  <head>
+    <script>
+      function start() {
+        var length = history.length;
+        document.open();
+        document.write("<h5 id='dynamic'>document.written content</h5>");
+        document.close();
+        opener.is(history.length, length,
+                  "document.open/close should not change history");
+        opener.finishTest();
+      }
+    </script>
+  </head>
+  <body onload="start();">
+    <h5>static content</h5>
+  </body>
+</html>
diff --git a/docshell/test/navigation/file_evict_from_bfcache.html b/docshell/test/navigation/file_evict_from_bfcache.html
new file mode 100644
index 0000000000..9f50533543
--- /dev/null
+++ b/docshell/test/navigation/file_evict_from_bfcache.html
@@ -0,0 +1,29 @@
+<html>
+  <head>
+    <script>
+      onpageshow = function(pageShowEvent) {
+        var bc = new BroadcastChannel("evict_from_bfcache");
+        bc.onmessage = function(event) {
+          if (event.data == "nextpage") {
+            bc.close();
+            location.href += "?nextpage";
+          } else if (event.data == "back") {
+            bc.close();
+            history.back();
+          } else if (event.data == "forward") {
+            // Note, we don't close BroadcastChannel
+            history.forward();
+          } else if (event.data == "close") {
+            bc.postMessage("closed");
+            bc.close();
+            window.close();
+          }
+        }
+
+        bc.postMessage({ type: "pageshow", persisted: pageShowEvent.persisted});
+      };
+    </script>
+  </head>
+  <body>
+  </body>
+</html>
diff --git a/docshell/test/navigation/file_fragment_handling_during_load.html b/docshell/test/navigation/file_fragment_handling_during_load.html
new file mode 100644
index 0000000000..a7f468c32d
--- /dev/null
+++ b/docshell/test/navigation/file_fragment_handling_during_load.html
@@ -0,0 +1,27 @@
+<html>
+  <head>
+    <script>
+      function checkHaveLoadedNewDoc() {
+        let l = document.body.firstChild.contentWindow.location.href;
+        if (!l.endsWith("file_fragment_handling_during_load_frame2.sjs")) {
+          opener.ok(true, "Fine. We will check later.");
+          setTimeout(checkHaveLoadedNewDoc, 500);
+          return;
+        }
+        opener.ok(true, "Have loaded a new document.");
+        opener.finishTest();
+      }
+      function test() {
+        // Test that executing back() before load has started doesn't interrupt
+        // the load.
+        var ifr = document.getElementsByTagName("iframe")[0];
+        ifr.onload = checkHaveLoadedNewDoc;
+        ifr.contentWindow.location.hash = "b";
+        ifr.contentWindow.location.href = "file_fragment_handling_during_load_frame2.sjs";
+        history.back();
+      }
+    </script>
+  </head>
+  <body onload="setTimeout(test, 0)"><iframe src="file_fragment_handling_during_load_frame1.html#a"></iframe>
+  </body>
+</html>
diff --git a/docshell/test/navigation/file_fragment_handling_during_load_frame1.html b/docshell/test/navigation/file_fragment_handling_during_load_frame1.html
new file mode 100644
index 0000000000..c03ba2bda6
--- /dev/null
+++ b/docshell/test/navigation/file_fragment_handling_during_load_frame1.html
@@ -0,0 +1,6 @@
+<!DOCTYPE HTML>
+<html>
+<body>
+foo
+</body>
+</html>
diff --git a/docshell/test/navigation/file_fragment_handling_during_load_frame2.sjs b/docshell/test/navigation/file_fragment_handling_during_load_frame2.sjs
new file mode 100644
index 0000000000..77abe5949e
--- /dev/null
+++ b/docshell/test/navigation/file_fragment_handling_during_load_frame2.sjs
@@ -0,0 +1,20 @@
+/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set sts=2 sw=2 et tw=80 ft=javascript: */
+"use strict";
+
+function handleRequest(request, response) {
+  response.setHeader("Content-Type", "text/html", false);
+  response.setHeader("Cache-Control", "no-cache", false);
+  // Wait a bit.
+  var s = Date.now();
+  // eslint-disable-next-line no-empty
+  while (Date.now() - s < 1000) {}
+
+  response.write(`<!DOCTYPE HTML>
+  <html>
+    <body>
+     bar
+    </body>
+  </html>
+  `);
+}
diff --git a/docshell/test/navigation/file_load_history_entry_page_with_one_link.html b/docshell/test/navigation/file_load_history_entry_page_with_one_link.html
new file mode 100644
index 0000000000..a4d1b62176
--- /dev/null
+++ b/docshell/test/navigation/file_load_history_entry_page_with_one_link.html
@@ -0,0 +1,7 @@
+<!DOCTYPE html>
+<html>
+<body onpageshow="opener.bodyOnLoad()">
+<a id="link1" href="#1">Link 1</a>
+<a name="1">link 1</a>
+</body>
+</html>
diff --git a/docshell/test/navigation/file_load_history_entry_page_with_two_links.html b/docshell/test/navigation/file_load_history_entry_page_with_two_links.html
new file mode 100644
index 0000000000..4be2ea6f4e
--- /dev/null
+++ b/docshell/test/navigation/file_load_history_entry_page_with_two_links.html
@@ -0,0 +1,9 @@
+<!DOCTYPE html>
+<html>
+<body onpageshow="opener.bodyOnLoad()">
+<a id="link1" href="#1">Link 1</a>
+<a id="link2" href="#2">Link 2</a>
+<a name="1">link 1</a>
+<a name="2">link 2</a>
+</body>
+</html>
diff --git a/docshell/test/navigation/file_meta_refresh.html b/docshell/test/navigation/file_meta_refresh.html
new file mode 100644
index 0000000000..2a06cc5acf
--- /dev/null
+++ b/docshell/test/navigation/file_meta_refresh.html
@@ -0,0 +1,40 @@
+<html>
+  <head>
+  </head>
+  <body>
+    <script>
+      function addMetaRefresh() {
+        // eslint-disable-next-line no-unsanitized/property
+        document.head.innerHTML = "<meta http-equiv='refresh' content='5; url=" +
+          location.href.replace("?initial", "?refresh") + "'>";
+      }
+
+      onpageshow = function() {
+        let bc = new BroadcastChannel("test_meta_refresh");
+        bc.onmessage = function(event) {
+          if (event.data == "loadnext") {
+            bc.close();
+            addMetaRefresh();
+            location.href = location.href.replace("?initial", "?nextpage");
+          } else if (event.data == "back") {
+            bc.close();
+            history.back();
+          } else if (event.data == "ensuremetarefresh") {
+            bc.close();
+            // This test is designed to work with and without bfcache, but
+            // if bfcache is enabled, meta refresh should be suspended/resumed.
+            if (document.head.firstChild.localName != "meta") {
+              addMetaRefresh();
+            }
+          } else if (event.data == "close") {
+            bc.postMessage("closed");
+            bc.close();
+            window.close();
+          }
+        };
+
+        bc.postMessage({ load: location.search.substr(1) });
+      }
+    </script>
+  </body>
+</html>
diff --git a/docshell/test/navigation/file_navigation_type.html b/docshell/test/navigation/file_navigation_type.html
new file mode 100644
index 0000000000..bb538eefec
--- /dev/null
+++ b/docshell/test/navigation/file_navigation_type.html
@@ -0,0 +1,25 @@
+<html>
+  <head>
+    <script>
+    onpageshow = function() {
+      let bc = new BroadcastChannel("navigation_type");
+      bc.onmessage = function(event) {
+        if (event.data == "loadNewPage") {
+          bc.close();
+          location.href = location.href + "?next";
+        } else if (event.data == "back") {
+          bc.close();
+          history.back();
+        } else if (event.data == "close") {
+          window.close();
+          bc.postMessage("closed");
+          bc.close();
+        }
+      }
+      bc.postMessage({ navigationType: performance.navigation.type });
+    }
+    </script>
+  </head>
+  <body>
+  </body>
+</html>
\ No newline at end of file
diff --git a/docshell/test/navigation/file_nested_frames.html b/docshell/test/navigation/file_nested_frames.html
new file mode 100644
index 0000000000..6ec286aa3e
--- /dev/null
+++ b/docshell/test/navigation/file_nested_frames.html
@@ -0,0 +1,27 @@
+<html>
+  <head>
+    <script>
+      function nestedIframeLoaded() {
+        var tf = document.getElementById("testframe");
+        var innerf = tf.contentDocument.getElementsByTagName("iframe")[0];
+        if (!innerf.contentDocument.documentURI.includes("frame0")) {
+          innerf.contentWindow.location.href = "http://mochi.test:8888/tests/docshell/test/navigation/frame0.html";
+          return;
+        }
+        innerf.onload = null;
+        innerf.src = "about:blank";
+        var d = innerf.contentDocument;
+        d.open();
+        d.write("test");
+        d.close();
+        opener.is(window.history.length, 1, "Unexpected history length");
+        opener.finishTest();
+      }
+    </script>
+  </head>
+  <body>
+  <iframe id="testframe" src="file_nested_frames_innerframe.html" onload="frameLoaded()"></iframe>
+  <script>
+  </script>
+  </body>
+</html>
diff --git a/docshell/test/navigation/file_nested_frames_innerframe.html b/docshell/test/navigation/file_nested_frames_innerframe.html
new file mode 100644
index 0000000000..e25b6a4f6a
--- /dev/null
+++ b/docshell/test/navigation/file_nested_frames_innerframe.html
@@ -0,0 +1 @@
+<iframe onload='parent.nestedIframeLoaded();'></iframe>
diff --git a/docshell/test/navigation/file_nested_srcdoc.html b/docshell/test/navigation/file_nested_srcdoc.html
new file mode 100644
index 0000000000..ae6d656f27
--- /dev/null
+++ b/docshell/test/navigation/file_nested_srcdoc.html
@@ -0,0 +1,3 @@
+
+iframe loaded inside of a srcdoc
+<iframe id="static" srcdoc="Second nested srcdoc<iframe id='static' srcdoc='Third nested srcdoc'&gt;</iframe&gt;"></iframe>
diff --git a/docshell/test/navigation/file_new_shentry_during_history_navigation_1.html b/docshell/test/navigation/file_new_shentry_during_history_navigation_1.html
new file mode 100644
index 0000000000..2f9a41e1d1
--- /dev/null
+++ b/docshell/test/navigation/file_new_shentry_during_history_navigation_1.html
@@ -0,0 +1,5 @@
+<script>
+  onload = function() {
+    opener.postMessage("load");
+  }
+</script>
diff --git a/docshell/test/navigation/file_new_shentry_during_history_navigation_1.html^headers^ b/docshell/test/navigation/file_new_shentry_during_history_navigation_1.html^headers^
new file mode 100644
index 0000000000..59ba296103
--- /dev/null
+++ b/docshell/test/navigation/file_new_shentry_during_history_navigation_1.html^headers^
@@ -0,0 +1 @@
+Cache-control: no-store
diff --git a/docshell/test/navigation/file_new_shentry_during_history_navigation_2.html b/docshell/test/navigation/file_new_shentry_during_history_navigation_2.html
new file mode 100644
index 0000000000..de456f8f1c
--- /dev/null
+++ b/docshell/test/navigation/file_new_shentry_during_history_navigation_2.html
@@ -0,0 +1,10 @@
+<script>
+  onload = function() {
+    opener.postMessage("load");
+  }
+
+  onbeforeunload = function() {
+    opener.postMessage("beforeunload");
+    history.pushState("data1", "", "?push1");
+  }
+</script>
diff --git a/docshell/test/navigation/file_new_shentry_during_history_navigation_2.html^headers^ b/docshell/test/navigation/file_new_shentry_during_history_navigation_2.html^headers^
new file mode 100644
index 0000000000..59ba296103
--- /dev/null
+++ b/docshell/test/navigation/file_new_shentry_during_history_navigation_2.html^headers^
@@ -0,0 +1 @@
+Cache-control: no-store
diff --git a/docshell/test/navigation/file_new_shentry_during_history_navigation_3.html b/docshell/test/navigation/file_new_shentry_during_history_navigation_3.html
new file mode 100644
index 0000000000..2237e3e367
--- /dev/null
+++ b/docshell/test/navigation/file_new_shentry_during_history_navigation_3.html
@@ -0,0 +1,22 @@
+<script>
+  window.onpageshow = function(e) {
+    if (location.search == "?v2") {
+      onbeforeunload = function() {
+        history.pushState("data1", "", "?push1");
+      }
+    }
+
+    let bc = new BroadcastChannel("new_shentry_during_history_navigation");
+    bc.onmessage = function(event) {
+      bc.close();
+      if (event.data == "loadnext") {
+        location.href = "file_new_shentry_during_history_navigation_4.html";
+      } else if (event.data == "back") {
+        history.back();
+      } else if (event.data == "close") {
+        window.close();
+      }
+    }
+    bc.postMessage({page: location.href, type: e.type, persisted: e.persisted});
+  }
+</script>
diff --git a/docshell/test/navigation/file_new_shentry_during_history_navigation_3.html^headers^ b/docshell/test/navigation/file_new_shentry_during_history_navigation_3.html^headers^
new file mode 100644
index 0000000000..59ba296103
--- /dev/null
+++ b/docshell/test/navigation/file_new_shentry_during_history_navigation_3.html^headers^
@@ -0,0 +1 @@
+Cache-control: no-store
diff --git a/docshell/test/navigation/file_new_shentry_during_history_navigation_4.html b/docshell/test/navigation/file_new_shentry_during_history_navigation_4.html
new file mode 100644
index 0000000000..d5c3f61794
--- /dev/null
+++ b/docshell/test/navigation/file_new_shentry_during_history_navigation_4.html
@@ -0,0 +1,16 @@
+<script>
+  window.onpageshow = function(e) {
+    let bc = new BroadcastChannel("new_shentry_during_history_navigation");
+    bc.onmessage = function(event) {
+      bc.close();
+      if (event.data == "loadnext") {
+        location.href = "file_new_shentry_during_history_navigation_3.html?v2";
+      } else if (event.data == "forward") {
+        history.forward();
+      } else if (event.data == "close") {
+        window.close();
+      }
+    }
+    bc.postMessage({page: location.href, type: e.type, persisted: e.persisted});
+  }
+</script>
diff --git a/docshell/test/navigation/file_online_offline_bfcache.html b/docshell/test/navigation/file_online_offline_bfcache.html
new file mode 100644
index 0000000000..7f8138e758
--- /dev/null
+++ b/docshell/test/navigation/file_online_offline_bfcache.html
@@ -0,0 +1,41 @@
+<html>
+  <head>
+    <script>
+      onpageshow = function(pageshowEvent) {
+        let bc = new BroadcastChannel("online_offline_bfcache");
+        bc.onmessage = function(event) {
+          if (event.data == "nextpage") {
+            bc.close();
+            location.href = location.href + "?nextpage";
+          } else if (event.data == "back") {
+            bc.close();
+            history.back();
+          } else if (event.data == "forward") {
+            bc.close();
+            history.forward();
+          }  else if (event.data == "close") {
+            bc.postMessage("closed");
+            bc.close();
+            window.close();
+          }
+        };
+        bc.postMessage({ event: pageshowEvent.type, persisted: pageshowEvent.persisted });
+      }
+
+      onoffline = function(event) {
+        let bc = new BroadcastChannel("online_offline_bfcache");
+        bc.postMessage(event.type);
+        bc.close();
+      }
+
+      ononline = function(event) {
+        let bc = new BroadcastChannel("online_offline_bfcache");
+        bc.postMessage(event.type);
+        bc.close();
+      }
+
+    </script>
+  </head>
+  <body>
+  </body>
+</html>
diff --git a/docshell/test/navigation/file_reload.html b/docshell/test/navigation/file_reload.html
new file mode 100644
index 0000000000..f0cb1c2d52
--- /dev/null
+++ b/docshell/test/navigation/file_reload.html
@@ -0,0 +1,23 @@
+<html>
+  <head>
+    <script>
+    window.onpageshow = function() {
+      let bc = new BroadcastChannel("test_reload");
+      bc.onmessage = function(event) {
+        if (event.data == "reload") {
+          bc.close();
+          location.reload(true);
+        } else if (event.data == "close") {
+          bc.postMessage("closed");
+          bc.close();
+          window.close();
+        }
+      }
+
+      bc.postMessage("pageshow");
+    }
+    </script>
+  </head>
+  <body>
+  </body>
+</html>
diff --git a/docshell/test/navigation/file_reload_large_postdata.sjs b/docshell/test/navigation/file_reload_large_postdata.sjs
new file mode 100644
index 0000000000..385d43d99f
--- /dev/null
+++ b/docshell/test/navigation/file_reload_large_postdata.sjs
@@ -0,0 +1,46 @@
+/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set sts=2 sw=2 et tw=80 ft=javascript: */
+"use strict";
+
+const BinaryInputStream = Components.Constructor(
+  "@mozilla.org/binaryinputstream;1",
+  "nsIBinaryInputStream",
+  "setInputStream"
+);
+
+Cu.importGlobalProperties(["URLSearchParams"]);
+
+function readStream(inputStream) {
+  let available = 0;
+  let result = [];
+  while ((available = inputStream.available()) > 0) {
+    result.push(inputStream.readBytes(available));
+  }
+  return result.join("");
+}
+
+function handleRequest(request, response) {
+  let rv = (() => {
+    try {
+      if (request.method != "POST") {
+        return "ERROR: not a POST request";
+      }
+
+      let body = new URLSearchParams(
+        readStream(new BinaryInputStream(request.bodyInputStream))
+      );
+      return body.get("payload").length;
+    } catch (e) {
+      return "ERROR: Exception: " + e;
+    }
+  })();
+
+  response.setHeader("Content-Type", "text/html", false);
+  response.setHeader("Cache-Control", "no-cache", false);
+  response.write(`<!DOCTYPE HTML>
+<script>
+let rv = (${JSON.stringify(rv)});
+opener.postMessage(rv, "*");
+</script>
+  `);
+}
diff --git a/docshell/test/navigation/file_reload_nonbfcached_srcdoc.sjs b/docshell/test/navigation/file_reload_nonbfcached_srcdoc.sjs
new file mode 100644
index 0000000000..e1ef75efa0
--- /dev/null
+++ b/docshell/test/navigation/file_reload_nonbfcached_srcdoc.sjs
@@ -0,0 +1,27 @@
+const createPage = function (msg) {
+  return `
+<html>
+<script>
+  onpageshow = function() {
+    opener.postMessage(document.body.firstChild.contentDocument.body.textContent);
+  }
+</script>
+<body><iframe srcdoc="${msg}"></iframe><body>
+</html>
+`;
+};
+
+function handleRequest(request, response) {
+  response.setHeader("Cache-Control", "no-store");
+  response.setHeader("Content-Type", "text/html");
+
+  let currentState = getState("reload_nonbfcached_srcdoc");
+  let srcdoc = "pageload:" + currentState;
+  if (currentState != "second") {
+    setState("reload_nonbfcached_srcdoc", "second");
+  } else {
+    setState("reload_nonbfcached_srcdoc", "");
+  }
+
+  response.write(createPage(srcdoc));
+}
diff --git a/docshell/test/navigation/file_same_url.html b/docshell/test/navigation/file_same_url.html
new file mode 100644
index 0000000000..72a1dd2564
--- /dev/null
+++ b/docshell/test/navigation/file_same_url.html
@@ -0,0 +1,24 @@
+<!DOCTYPE html>
+<html>
+<head>
+<script>
+let bc = new BroadcastChannel("test_same_url");
+let listener = e => {
+    switch (e.data) {
+    case "linkClick":
+        var link = document.getElementById("link1");
+        link.click();
+        break;
+    case "closeWin":
+        self.close();
+        break;
+    }
+};
+bc.addEventListener("message", listener);
+</script>
+</head>
+<body onpageshow="bc.postMessage({bodyOnLoad: history.length})">
+<a id="link1" href="file_same_url.html">Link 1</a>
+<a name="1">link 1</a>
+</body>
+</html>
diff --git a/docshell/test/navigation/file_scrollRestoration_bfcache_and_nobfcache.html b/docshell/test/navigation/file_scrollRestoration_bfcache_and_nobfcache.html
new file mode 100644
index 0000000000..fec51f821d
--- /dev/null
+++ b/docshell/test/navigation/file_scrollRestoration_bfcache_and_nobfcache.html
@@ -0,0 +1,30 @@
+<html>
+  <head>
+    <script>
+      // Ensure layout is flushed before doing anything with scrolling.
+      function flushAndExecute(callback) {
+        window.requestAnimationFrame(function() {
+          setTimeout(callback);
+        });
+      }
+
+      var bc = new BroadcastChannel("bfcached");
+      bc.onmessage = (msgEvent) => {
+        if (msgEvent.data == "loadNext") {
+          flushAndExecute(() => {
+            location.href = "file_scrollRestoration_bfcache_and_nobfcache_part2.html";
+          });
+        } else if (msgEvent.data == "forward") {
+          flushAndExecute(() => {
+            history.forward();
+          });
+        }
+      };
+      window.onpageshow = (event) => {
+        bc.postMessage({command: "pageshow", persisted: event.persisted});
+      };
+    </script>
+  </head>
+  <body>
+  </body>
+</html>
diff --git a/docshell/test/navigation/file_scrollRestoration_bfcache_and_nobfcache_part2.html b/docshell/test/navigation/file_scrollRestoration_bfcache_and_nobfcache_part2.html
new file mode 100644
index 0000000000..40e0578515
--- /dev/null
+++ b/docshell/test/navigation/file_scrollRestoration_bfcache_and_nobfcache_part2.html
@@ -0,0 +1,35 @@
+<html>
+  <head>
+    <script>
+      // Note, this page does not enter bfcache because of an HTTP header.
+
+      // Ensure layout is flushed before doing anything with scrolling.
+      function flushAndExecute(callback) {
+        window.requestAnimationFrame(function() {
+          setTimeout(callback);
+        });
+      }
+
+      var bc = new BroadcastChannel("notbfcached");
+      bc.onmessage = (msgEvent) => {
+        if (msgEvent.data == "scroll") {
+          flushAndExecute(() => {  window.scrollTo(0, 4000); });
+        } else if (msgEvent.data == "getScrollY") {
+          flushAndExecute(() => { bc.postMessage({ scrollY: window.scrollY}); });
+        } else if (msgEvent.data == "back") {
+          flushAndExecute(() => { bc.close(); history.back(); });
+        } else if (msgEvent.data == "close") {
+          bc.postMessage("closed");
+          bc.close();
+          window.close();
+        }
+      };
+      window.onpageshow = (event) => {
+        bc.postMessage({command: "pageshow", persisted: event.persisted});
+      };
+    </script>
+  </head>
+  <body>
+    <div style="height: 5000px; border: 1px solid black;">content</div>
+  </body>
+</html>
diff --git a/docshell/test/navigation/file_scrollRestoration_bfcache_and_nobfcache_part2.html^headers^ b/docshell/test/navigation/file_scrollRestoration_bfcache_and_nobfcache_part2.html^headers^
new file mode 100644
index 0000000000..59ba296103
--- /dev/null
+++ b/docshell/test/navigation/file_scrollRestoration_bfcache_and_nobfcache_part2.html^headers^
@@ -0,0 +1 @@
+Cache-control: no-store
diff --git a/docshell/test/navigation/file_scrollRestoration_navigate.html b/docshell/test/navigation/file_scrollRestoration_navigate.html
new file mode 100644
index 0000000000..ac78f0abbe
--- /dev/null
+++ b/docshell/test/navigation/file_scrollRestoration_navigate.html
@@ -0,0 +1,17 @@
+<!DOCTYPE HTML>
+<script>
+  var bc = new BroadcastChannel("navigate");
+  window.onload = () => {
+    bc.onmessage = (event) => {
+      if (event.data.command == "navigate") {
+        window.location = event.data.location;
+        bc.close();
+      }
+      if (event.data.command == "back") {
+        history.back();
+        bc.close();
+      }
+    }
+    bc.postMessage({command: "loaded", scrollRestoration: history.scrollRestoration});
+  }
+</script>
\ No newline at end of file
diff --git a/docshell/test/navigation/file_scrollRestoration_part1_nobfcache.html b/docshell/test/navigation/file_scrollRestoration_part1_nobfcache.html
new file mode 100644
index 0000000000..1c94899ac2
--- /dev/null
+++ b/docshell/test/navigation/file_scrollRestoration_part1_nobfcache.html
@@ -0,0 +1,63 @@
+<html>
+  <head>
+    <script>
+      var oldHistoryObject = null;
+      var bc = new BroadcastChannel("bug1155730_part1");
+      bc.onmessage = (msgEvent) => {
+        var msg = msgEvent.data;
+        var command = msg.command;
+        if (command == "test") {
+          var currentCase = msg.currentCase;
+          test(currentCase);
+        }
+      }
+
+      function test(currentCase) {
+        var assertIs = [];
+        var assertOk = [];
+        var assertIsNot = [];
+        switch (currentCase) {
+          case 1: {
+            assertOk.push([history.scrollRestoration, "History object has scrollRestoration property."]);
+            assertIs.push([history.scrollRestoration, "auto", "history.scrollRestoration's default value should be 'auto'."]);
+            history.scrollRestoration = "foobar";
+            assertIs.push([history.scrollRestoration, "auto", "Invalid enum value should not change the value of an attribute."]);
+            history.scrollRestoration = "manual";
+            assertIs.push([history.scrollRestoration, "manual", "Valid enum value should change the value of an attribute."]);
+            history.scrollRestoration = "auto";
+            assertIs.push([history.scrollRestoration, "auto", "Valid enum value should change the value of an attribute."]);
+            bc.postMessage({command: "asserts", currentCase, assertIs, assertOk});
+            document.getElementById("bottom").scrollIntoView();
+            window.location.reload(false);
+            break;
+          }
+          case 2: {
+            assertIsNot.push([Math.round(window.scrollY), 0, "Should have restored scrolling."]);
+            assertIs.push([history.scrollRestoration, "auto", "Should have the same scrollRestoration as before reload."]);
+            history.scrollRestoration = "manual";
+            bc.postMessage({command: "asserts", currentCase, assertIs, assertIsNot});
+            window.location.reload(false);
+            break;
+          }
+          case 3: {
+            assertIs.push([window.scrollY, 0, "Should not have restored scrolling."]);
+            assertIs.push([history.scrollRestoration, "manual", "Should have the same scrollRestoration as before reload."]);
+            bc.postMessage({command: "asserts", currentCase, assertIs});
+            bc.close();
+            window.close();
+            break;
+          }
+        }
+      }
+      window.onpageshow = (event) => {
+        bc.postMessage({command: "pageshow", persisted: event.persisted});
+      }
+    </script>
+  </head>
+  <body>
+  <div style="border: 1px solid black; height: 5000px;">
+  &nbsp;</div>
+  <div id="bottom">Hello world</div>
+  <a href="#hash" name="hash">hash</a>
+  </body>
+</html>
diff --git a/docshell/test/navigation/file_scrollRestoration_part1_nobfcache.html^headers^ b/docshell/test/navigation/file_scrollRestoration_part1_nobfcache.html^headers^
new file mode 100644
index 0000000000..f944e3806d
--- /dev/null
+++ b/docshell/test/navigation/file_scrollRestoration_part1_nobfcache.html^headers^
@@ -0,0 +1 @@
+Cache-control: no-store
\ No newline at end of file
diff --git a/docshell/test/navigation/file_scrollRestoration_part2_bfcache.html b/docshell/test/navigation/file_scrollRestoration_part2_bfcache.html
new file mode 100644
index 0000000000..2776e42a6e
--- /dev/null
+++ b/docshell/test/navigation/file_scrollRestoration_part2_bfcache.html
@@ -0,0 +1,57 @@
+<html>
+  <head>
+    <script>
+      var bc = new BroadcastChannel("bug1155730_part2");
+      bc.onmessage = (msgEvent) => {
+        var msg = msgEvent.data;
+        var command = msg.command;
+        if (command == "test") {
+          var currentCase = msg.currentCase;
+          test(currentCase);
+        }
+      }
+
+      function test(currentCase) {
+        var assertIs = [];
+        var assertIsNot = [];
+        switch (currentCase) {
+          case 1: {
+            history.scrollRestoration = "manual";
+            document.getElementById("bottom").scrollIntoView();
+            window.location.href = "file_scrollRestoration_navigate.html";
+            break;
+          }
+          case 2: {
+            assertIsNot.push([Math.round(window.scrollY), 0, "Should have kept the old scroll position."]);
+            assertIs.push([history.scrollRestoration, "manual", "Should have the same scrollRestoration as before reload."]);
+            bc.postMessage({command: "asserts", currentCase, assertIs, assertIsNot, assert2: "assert2"});
+            window.scrollTo(0, 0);
+            window.location.hash = "hash";
+            bc.postMessage({command: "nextCase"});
+            requestAnimationFrame(() => {
+              test(currentCase + 1);
+            });
+            break;
+          }
+          case 3: {
+            assertIsNot.push([Math.round(window.scrollY), 0, "Should have scrolled to #hash."]);
+            assertIs.push([history.scrollRestoration, "manual", "Should have the same scrollRestoration mode as before fragment navigation."]);
+            bc.postMessage({command: "asserts", currentCase, assertIs, assertIsNot});
+            bc.close();
+            window.close();
+            break;
+          }
+        }
+      }
+      window.onpageshow = (event) => {
+        bc.postMessage({command: "pageshow", persisted: event.persisted});
+      }
+    </script>
+  </head>
+  <body>
+  <div style="border: 1px solid black; height: 5000px;">
+  &nbsp;</div>
+  <div id="bottom">Hello world</div>
+  <a href="#hash" name="hash">hash</a>
+  </body>
+</html>
diff --git a/docshell/test/navigation/file_scrollRestoration_part3_nobfcache.html b/docshell/test/navigation/file_scrollRestoration_part3_nobfcache.html
new file mode 100644
index 0000000000..ffc68d6ccc
--- /dev/null
+++ b/docshell/test/navigation/file_scrollRestoration_part3_nobfcache.html
@@ -0,0 +1,157 @@
+<html>
+  <head>
+    <script>
+      var oldHistoryObject = null;
+      var currCaseForIframe = 0;
+      var bc = new BroadcastChannel("bug1155730_part3");
+      bc.onmessage = (msgEvent) => {
+        var msg = msgEvent.data;
+        var command = msg.command;
+        if (command == "test") {
+          var currentCase = msg.currentCase;
+          test(currentCase);
+        }
+      }
+
+      // If onpopstate event takes place, check if we need to call 'test()'
+      var callTest = false;
+      var nextCase = 0;
+      window.onpopstate = (e) => {
+        if (callTest) {
+          callTest = false;
+          setTimeout(() => {
+            test(nextCase);
+          });
+        }
+      }
+
+      function test(currentCase) {
+        var assertIs = [];
+        var assertOk = [];
+        var assertIsNot = [];
+        switch (currentCase) {
+          case 1: {
+            history.scrollRestoration = "manual";
+            window.location.hash = "hash";
+            bc.postMessage({command: "nextCase"});
+            requestAnimationFrame(() => {
+              test(currentCase + 1);
+            });
+            break;
+          }
+          case 2: {
+            assertIsNot.push([Math.round(window.scrollY), 0, "Should have scrolled to #hash."]);
+            assertIs.push([history.scrollRestoration, "manual", "Should have the same scrollRestoration mode as before fragment navigation."]);
+            bc.postMessage({command: "asserts", currentCase, assertIs, assertIsNot});
+            window.location.href = "file_scrollRestoration_navigate.html";
+            break;
+          }
+          case 3: {
+            assertIs.push([window.scrollY, 0, "Shouldn't have kept the old scroll position."]);
+            assertIs.push([history.scrollRestoration, "manual", "Should have the same scrollRestoration mode as before fragment navigation."]);
+            bc.postMessage({command: "asserts", currentCase, assertIs});
+            history.scrollRestoration = "auto";
+            document.getElementById("bottom").scrollIntoView();
+            history.pushState({ state: "state1" }, "state1");
+            history.pushState({ state: "state2" }, "state2");
+            window.scrollTo(0, 0);
+            bc.postMessage({command: "nextCase"});
+            callTest = true;
+            nextCase = currentCase + 1;
+            history.back(); // go back to state 1
+            break;
+          }
+          case 4: {
+            assertIsNot.push([Math.round(window.scrollY), 0, "Should have scrolled back to the state1's position"]);
+            assertIs.push([history.state.state, "state1", "Unexpected state."]);
+            bc.postMessage({command: "asserts", currentCase, assertIs, assertIsNot});
+
+            history.scrollRestoration = "manual";
+            document.getElementById("bottom").scrollIntoView();
+            history.pushState({ state: "state3" }, "state3");
+            history.pushState({ state: "state4" }, "state4");
+            window.scrollTo(0, 0);
+            bc.postMessage({command: "nextCase"});
+            callTest = true;
+            nextCase = currentCase + 1;
+            history.back(); // go back to state 3
+            break;
+          }
+          case 5: {
+            assertIs.push([Math.round(window.scrollY), 0, "Shouldn't have scrolled back to the state3's position"]);
+            assertIs.push([history.state.state, "state3", "Unexpected state."]);
+
+            history.pushState({ state: "state5" }, "state5");
+            history.scrollRestoration = "auto";
+            document.getElementById("bottom").scrollIntoView();
+            assertIsNot.push([Math.round(window.scrollY), 0, "Should have scrolled to 'bottom'."]);
+            bc.postMessage({command: "asserts", currentCase, assertIs, assertIsNot});
+            bc.postMessage({command: "nextCase"});
+            callTest = true;
+            nextCase = currentCase + 1;
+            // go back to state 3 (state 4 was removed when state 5 was pushed)
+            history.back();
+            break;
+          }
+          case 6: {
+            window.scrollTo(0, 0);
+            bc.postMessage({command: "nextCase"});
+            callTest = true;
+            nextCase = currentCase + 1;
+            history.forward();
+            break;
+          }
+          case 7: {
+            assertIsNot.push([Math.round(window.scrollY), 0, "Should have scrolled back to the state5's position"]);
+            bc.postMessage({command: "asserts", currentCase, assertIsNot});
+
+            var ifr = document.createElement("iframe");
+            ifr.src = "data:text/html,";
+            document.body.appendChild(ifr);
+            bc.postMessage({command: "nextCase"});
+            currCaseForIframe = currentCase + 1;
+            ifr.onload = () => {
+              test(currCaseForIframe);
+            };
+            break;
+          }
+          case 8: {
+            oldHistoryObject = SpecialPowers.wrap(document.getElementsByTagName("iframe")[0]).contentWindow.history;
+            bc.postMessage({command: "nextCase"});
+            currCaseForIframe++;
+            document.getElementsByTagName("iframe")[0].src = "about:blank";
+            break;
+          }
+          case 9: {
+            try {
+              oldHistoryObject.scrollRestoration;
+              assertOk.push([false, "Should have thrown an exception."]);
+            } catch (ex) {
+              assertOk.push([ex != null, "Did get an exception"]);
+            }
+            try {
+              oldHistoryObject.scrollRestoration = "auto";
+              assertOk.push([false, "Should have thrown an exception."]);
+            } catch (ex) {
+              assertOk.push([ex != null, "Did get an exception"]);
+            }
+            bc.postMessage({command: "asserts", currentCase, assertOk});
+            bc.postMessage({command: "finishing"});
+            bc.close();
+            window.close();
+            break;
+          }
+        }
+      }
+      window.onpageshow = (event) => {
+        bc.postMessage({command: "pageshow", persisted: event.persisted});
+      }
+    </script>
+  </head>
+  <body>
+  <div style="border: 1px solid black; height: 5000px;">
+  &nbsp;</div>
+  <div id="bottom">Hello world</div>
+  <a href="#hash" name="hash">hash</a>
+  </body>
+</html>
diff --git a/docshell/test/navigation/file_scrollRestoration_part3_nobfcache.html^headers^ b/docshell/test/navigation/file_scrollRestoration_part3_nobfcache.html^headers^
new file mode 100644
index 0000000000..f944e3806d
--- /dev/null
+++ b/docshell/test/navigation/file_scrollRestoration_part3_nobfcache.html^headers^
@@ -0,0 +1 @@
+Cache-control: no-store
\ No newline at end of file
diff --git a/docshell/test/navigation/file_session_history_on_redirect.html b/docshell/test/navigation/file_session_history_on_redirect.html
new file mode 100644
index 0000000000..df7e99a1dd
--- /dev/null
+++ b/docshell/test/navigation/file_session_history_on_redirect.html
@@ -0,0 +1,16 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <script>
+    window.onpagehide = function(event) {
+      opener.is(event.persisted, false, "Should have disabled bfcache for this test.");
+    }
+
+    window.onpageshow = function(event) {
+      opener.pageshow();
+    }
+  </script>
+</head>
+<body>
+</body>
+</html>
diff --git a/docshell/test/navigation/file_session_history_on_redirect.html^headers^ b/docshell/test/navigation/file_session_history_on_redirect.html^headers^
new file mode 100644
index 0000000000..59ba296103
--- /dev/null
+++ b/docshell/test/navigation/file_session_history_on_redirect.html^headers^
@@ -0,0 +1 @@
+Cache-control: no-store
diff --git a/docshell/test/navigation/file_session_history_on_redirect_2.html b/docshell/test/navigation/file_session_history_on_redirect_2.html
new file mode 100644
index 0000000000..df7e99a1dd
--- /dev/null
+++ b/docshell/test/navigation/file_session_history_on_redirect_2.html
@@ -0,0 +1,16 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <script>
+    window.onpagehide = function(event) {
+      opener.is(event.persisted, false, "Should have disabled bfcache for this test.");
+    }
+
+    window.onpageshow = function(event) {
+      opener.pageshow();
+    }
+  </script>
+</head>
+<body>
+</body>
+</html>
diff --git a/docshell/test/navigation/file_session_history_on_redirect_2.html^headers^ b/docshell/test/navigation/file_session_history_on_redirect_2.html^headers^
new file mode 100644
index 0000000000..59ba296103
--- /dev/null
+++ b/docshell/test/navigation/file_session_history_on_redirect_2.html^headers^
@@ -0,0 +1 @@
+Cache-control: no-store
diff --git a/docshell/test/navigation/file_sessionhistory_iframe_removal.html b/docshell/test/navigation/file_sessionhistory_iframe_removal.html
new file mode 100644
index 0000000000..f18e849942
--- /dev/null
+++ b/docshell/test/navigation/file_sessionhistory_iframe_removal.html
@@ -0,0 +1,37 @@
+<html>
+  <head>
+    <script>
+      async function wait() {
+        return opener.SpecialPowers.spawnChrome([], function() { /*dummy */ });
+      }
+      async function run() {
+        var counter = 0;
+        while(true) {
+          // Push new history entries until we hit the limit and start removing
+          // entries from the front.
+          var len = history.length;
+          document.getElementById("ifr1").contentWindow.history.pushState(++counter, null, null);
+          await wait();
+          if (len == history.length) {
+            opener.ok(true, "Found max length " + len);
+            document.getElementById("ifr2").contentWindow.history.pushState(++counter, null, null);
+            await wait();
+            document.getElementById("ifr1").contentWindow.history.pushState(++counter, null, null);
+            await wait();
+            opener.is(len, history.length, "Adding session history entries in different iframe should behave the same way");
+            // This should remove all the history entries for ifr1, leaving just
+            // the ones for ifr2.
+            document.getElementById("ifr1").remove();
+            opener.is(history.length, 2, "Should have entries for the initial load and the pushState for ifr2");
+            opener.finishTest();
+            break;
+          }
+        }
+      }
+    </script>
+  </head>
+  <body onload="setTimeout(run)">
+    <iframe src="blank.html" id="ifr1"></iframe>
+    <iframe src="blank.html" id="ifr2"></iframe>
+  </body>
+</html>
diff --git a/docshell/test/navigation/file_shiftReload_and_pushState.html b/docshell/test/navigation/file_shiftReload_and_pushState.html
new file mode 100644
index 0000000000..7882143c83
--- /dev/null
+++ b/docshell/test/navigation/file_shiftReload_and_pushState.html
@@ -0,0 +1,28 @@
+<html>
+  <head>
+    <script>
+      function test() {
+        try {
+          frames[0].history.pushState({}, "state", "?pushed");
+        } catch (ex) {
+          opener.ok(false, "history.pushState shouldn't throw");
+        }
+
+        if (!opener.shiftReloadPushStateFirstRound) {
+          opener.shiftReloadPushStateFirstRound = true;
+          window.location.reload(true);
+        } else {
+          opener.ok(true, "Did run history.push");
+          opener.finishTest();
+        }
+      }
+
+      window.addEventListener("load", function() { setTimeout(test, 0); });
+    </script>
+  </head>
+  <body>
+  <iframe src="frame0.html"></iframe>
+  <script>
+  </script>
+  </body>
+</html>
diff --git a/docshell/test/navigation/file_ship_beforeunload_fired.html b/docshell/test/navigation/file_ship_beforeunload_fired.html
new file mode 100644
index 0000000000..a1f416f959
--- /dev/null
+++ b/docshell/test/navigation/file_ship_beforeunload_fired.html
@@ -0,0 +1,37 @@
+<html>
+  <script>
+    onpageshow = function(pageShowEvent) {
+      var bc = new BroadcastChannel("ship_beforeunload");
+      bc.onmessage = function(event) {
+        if (event.data.action == "register_beforeunload") {
+          onbeforeunload = function() {
+            bc.postMessage("beforeunload_fired");
+            bc.close();
+          }
+          if (event.data.loadNextPageFromSessionHistory) {
+            history.back();
+          } else {
+            location.href += "?differentpage";
+          }
+        } else if (event.data.action == "navigate_to_page_b") {
+          bc.close();
+          if (event.data.blockBFCache) {
+            window.blockBFCache = new RTCPeerConnection();
+          }
+          location.href += "?pageb";
+        } else if (event.data.action == "back_to_page_b") {
+          if (event.data.forwardNavigateToPageB) {
+            history.forward();
+          } else {
+            history.back();
+          }
+          bc.close();
+        } else if (event.data.action == "close") {
+          bc.close();
+          window.close();
+        }
+      }
+      bc.postMessage({type: pageShowEvent.type, persisted: pageShowEvent.persisted});
+    }
+  </script>
+</html>
diff --git a/docshell/test/navigation/file_static_and_dynamic_1.html b/docshell/test/navigation/file_static_and_dynamic_1.html
new file mode 100644
index 0000000000..e66216c41e
--- /dev/null
+++ b/docshell/test/navigation/file_static_and_dynamic_1.html
@@ -0,0 +1,31 @@
+<html>
+  <head>
+    <script>
+    function test() {
+      var ifr = document.createElement("iframe");
+      ifr.src = "frame0.html";
+      document.getElementById("dynamic").appendChild(ifr);
+      var staticFrame = document.getElementById("staticframe");
+      staticFrame.onload = window.location = "goback.html";
+      staticFrame.contentWindow.location = "frame1.html";
+    }
+
+    function start() {
+      if (++opener.testCount == 1) {
+        test();
+      } else {
+        var staticFrame = document.getElementById("staticframe");
+        opener.ok(String(staticFrame.contentWindow.location).includes(staticFrame.src),
+                  "Wrong document loaded!");
+        opener.finishTest();
+      }
+    }
+    </script>
+  </head>
+  <body onload="setTimeout('start()', 0)">
+    <h5>Dynamic</h5>
+    <div id="dynamic"></div>
+    <h5>Static</h5>
+    <div id="static"><iframe id="staticframe" src="frame0.html"></iframe></div>
+  </body>
+</html>
diff --git a/docshell/test/navigation/file_tell_opener.html b/docshell/test/navigation/file_tell_opener.html
new file mode 100644
index 0000000000..bd45c275e6
--- /dev/null
+++ b/docshell/test/navigation/file_tell_opener.html
@@ -0,0 +1,8 @@
+<html>
+  <body onload="bodyLoaded()">Frame 1</body>
+  <script>
+  function bodyLoaded() {
+    opener.postMessage("body-loaded", "*");
+  }
+  </script>
+</html>
diff --git a/docshell/test/navigation/file_triggeringprincipal_frame_1.html b/docshell/test/navigation/file_triggeringprincipal_frame_1.html
new file mode 100644
index 0000000000..528437f892
--- /dev/null
+++ b/docshell/test/navigation/file_triggeringprincipal_frame_1.html
@@ -0,0 +1,27 @@
+<!DOCTYPE HTML>
+<html>
+<head><meta charset="utf-8"></head>
+<body>
+<b>Frame 1</b><br/>
+<a href="#"" id="testlink" onclick="parent.frames[1].frames[0].location='http://test2.mochi.test:8888/tests/docshell/test/navigation/file_triggeringprincipal_subframe_nav.html'">click me</a>
+
+<script type="application/javascript">
+  // make sure to set document.domain to the same domain as the subframe
+  window.onload = function() {
+    document.domain = "mochi.test";
+  };
+  window.addEventListener("message", receiveMessage);
+  function receiveMessage(event) {
+    // make sure to get the right start command, otherwise
+    // let the parent know and fail the test
+    if (event.data.start !== "startTest") {
+      window.removeEventListener("message", receiveMessage);
+      window.parent.postMessage({triggeringPrincipalURI: "false"}, "*");
+    }
+    // click the link to navigate the subframe
+    document.getElementById("testlink").click();
+  }
+</script>
+
+</body>
+</html>
diff --git a/docshell/test/navigation/file_triggeringprincipal_frame_2.html b/docshell/test/navigation/file_triggeringprincipal_frame_2.html
new file mode 100644
index 0000000000..ef7cdfc178
--- /dev/null
+++ b/docshell/test/navigation/file_triggeringprincipal_frame_2.html
@@ -0,0 +1,8 @@
+<!DOCTYPE HTML>
+<html>
+<head><meta charset="utf-8"></head>
+<body>
+<b>Frame 2</b><br/>
+<iframe src="http://test2.mochi.test:8888/tests/docshell/test/navigation/file_triggeringprincipal_subframe.html"></iframe>
+</body>
+</html>
diff --git a/docshell/test/navigation/file_triggeringprincipal_iframe_iframe_window_open_frame_a.html b/docshell/test/navigation/file_triggeringprincipal_iframe_iframe_window_open_frame_a.html
new file mode 100644
index 0000000000..75b2933c1b
--- /dev/null
+++ b/docshell/test/navigation/file_triggeringprincipal_iframe_iframe_window_open_frame_a.html
@@ -0,0 +1,6 @@
+<!DOCTYPE html>
+<html>
+<body>
+Frame A
+</body>
+</html>
diff --git a/docshell/test/navigation/file_triggeringprincipal_iframe_iframe_window_open_frame_a_nav.html b/docshell/test/navigation/file_triggeringprincipal_iframe_iframe_window_open_frame_a_nav.html
new file mode 100644
index 0000000000..0479f5e1e5
--- /dev/null
+++ b/docshell/test/navigation/file_triggeringprincipal_iframe_iframe_window_open_frame_a_nav.html
@@ -0,0 +1,6 @@
+<!DOCTYPE html>
+<html>
+<body>
+Frame A navigated by Frame B
+</body>
+</html>
diff --git a/docshell/test/navigation/file_triggeringprincipal_iframe_iframe_window_open_frame_b.html b/docshell/test/navigation/file_triggeringprincipal_iframe_iframe_window_open_frame_b.html
new file mode 100644
index 0000000000..e5d40b267a
--- /dev/null
+++ b/docshell/test/navigation/file_triggeringprincipal_iframe_iframe_window_open_frame_b.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<html>
+<body>
+Frame B navigating Frame A
+
+<script type="text/javascript">
+
+window.open("file_triggeringprincipal_iframe_iframe_window_open_frame_a_nav.html", "framea");
+
+</script>
+
+</body>
+</html>
+
+
diff --git a/docshell/test/navigation/file_triggeringprincipal_parent_iframe_window_open_base.html b/docshell/test/navigation/file_triggeringprincipal_parent_iframe_window_open_base.html
new file mode 100644
index 0000000000..caa6b275b9
--- /dev/null
+++ b/docshell/test/navigation/file_triggeringprincipal_parent_iframe_window_open_base.html
@@ -0,0 +1,6 @@
+<!DOCTYPE html>
+<html>
+<body>
+base test frame
+</body>
+</html>
diff --git a/docshell/test/navigation/file_triggeringprincipal_parent_iframe_window_open_nav.html b/docshell/test/navigation/file_triggeringprincipal_parent_iframe_window_open_nav.html
new file mode 100644
index 0000000000..f4a4d0e631
--- /dev/null
+++ b/docshell/test/navigation/file_triggeringprincipal_parent_iframe_window_open_nav.html
@@ -0,0 +1,6 @@
+<!DOCTYPE html>
+<html>
+<body>
+navigated by window.open()
+</body>
+</html>
diff --git a/docshell/test/navigation/file_triggeringprincipal_subframe.html b/docshell/test/navigation/file_triggeringprincipal_subframe.html
new file mode 100644
index 0000000000..ba6b6dc09a
--- /dev/null
+++ b/docshell/test/navigation/file_triggeringprincipal_subframe.html
@@ -0,0 +1,15 @@
+<!DOCTYPE HTML>
+<html>
+<head><meta charset='utf-8'></head>
+<body>
+<b>Sub Frame 2</b><br/>
+<script type='application/javascript'>
+  // make sure to set document.domain to same domain as frame 1
+  window.onload = function() {
+    document.domain = "mochi.test";
+    //   let Frame 1 know that we are ready to run the test
+    window.parent.parent.frames[0].postMessage({start: "startTest"}, "*");
+  };
+</script>
+</body>
+</html>
diff --git a/docshell/test/navigation/file_triggeringprincipal_subframe_nav.html b/docshell/test/navigation/file_triggeringprincipal_subframe_nav.html
new file mode 100644
index 0000000000..582181c00d
--- /dev/null
+++ b/docshell/test/navigation/file_triggeringprincipal_subframe_nav.html
@@ -0,0 +1,21 @@
+<!DOCTYPE HTML>
+<html>
+<head><meta charset="utf-8"></head>
+<body onload="checkResults()">
+<b>Sub Frame 2 Navigated</b><br/>
+
+<script type='application/javascript'>
+  function checkResults() {
+    // query the uri of the loadingPrincipal and the TriggeringPrincipal and pass
+    // that information on to the parent for verification.
+    var channel = SpecialPowers.wrap(window).docShell.currentDocumentChannel;
+    var triggeringPrincipalURI = channel.loadInfo.triggeringPrincipal.asciiSpec;
+    var loadingPrincipalURI = channel.loadInfo.loadingPrincipal.asciiSpec;
+    var referrerURI = document.referrer;
+    window.parent.parent.postMessage({triggeringPrincipalURI,
+                                    loadingPrincipalURI,
+                                    referrerURI}, "*");
+  }
+</script>
+</body>
+</html>
diff --git a/docshell/test/navigation/file_triggeringprincipal_subframe_same_origin_nav.html b/docshell/test/navigation/file_triggeringprincipal_subframe_same_origin_nav.html
new file mode 100644
index 0000000000..c84e216ae8
--- /dev/null
+++ b/docshell/test/navigation/file_triggeringprincipal_subframe_same_origin_nav.html
@@ -0,0 +1,20 @@
+<!DOCTYPE HTML>
+<html>
+<head><meta charset="utf-8"></head>
+<body onload="checkResults()">
+<b>SubFrame Same-Origin Navigated</b><br/>
+
+<script type='application/javascript'>
+  function checkResults() {
+    // query the uri of the loadingPrincipal and the TriggeringPrincipal and pass
+    // that information on to the parent for verification.
+    var channel = SpecialPowers.wrap(window).docShell.currentDocumentChannel;
+    var triggeringPrincipalURI = channel.loadInfo.triggeringPrincipal.asciiSpec;
+    var loadingPrincipalURI = channel.loadInfo.loadingPrincipal.asciiSpec;
+
+    window.parent.postMessage({triggeringPrincipalURI,
+                               loadingPrincipalURI}, "*");
+  }
+</script>
+</body>
+</html>
diff --git a/docshell/test/navigation/file_triggeringprincipal_window_open.html b/docshell/test/navigation/file_triggeringprincipal_window_open.html
new file mode 100644
index 0000000000..d0644a4d5c
--- /dev/null
+++ b/docshell/test/navigation/file_triggeringprincipal_window_open.html
@@ -0,0 +1,6 @@
+<!DOCTYPE html>
+<html>
+<body>
+http
+</body>
+</html>
diff --git a/docshell/test/navigation/frame0.html b/docshell/test/navigation/frame0.html
new file mode 100644
index 0000000000..93d1c9c822
--- /dev/null
+++ b/docshell/test/navigation/frame0.html
@@ -0,0 +1,3 @@
+<html>
+  <body>Frame 0</body>
+</html>
diff --git a/docshell/test/navigation/frame1.html b/docshell/test/navigation/frame1.html
new file mode 100644
index 0000000000..4d06c09d1c
--- /dev/null
+++ b/docshell/test/navigation/frame1.html
@@ -0,0 +1,3 @@
+<html>
+  <body>Frame 1</body>
+</html>
diff --git a/docshell/test/navigation/frame2.html b/docshell/test/navigation/frame2.html
new file mode 100644
index 0000000000..7a3b5e0b9b
--- /dev/null
+++ b/docshell/test/navigation/frame2.html
@@ -0,0 +1,3 @@
+<html>
+  <body>Frame 2</body>
+</html>
diff --git a/docshell/test/navigation/frame3.html b/docshell/test/navigation/frame3.html
new file mode 100644
index 0000000000..fd24293873
--- /dev/null
+++ b/docshell/test/navigation/frame3.html
@@ -0,0 +1,3 @@
+<html>
+  <body>Frame 3</body>
+</html>
diff --git a/docshell/test/navigation/frame_1_out_of_6.html b/docshell/test/navigation/frame_1_out_of_6.html
new file mode 100644
index 0000000000..93547cd1c4
--- /dev/null
+++ b/docshell/test/navigation/frame_1_out_of_6.html
@@ -0,0 +1,6 @@
+<html>
+  <body>
+    Page 1
+    <iframe style="height: 100vh; width: 100%;" id="static" src="http://test1.mochi.test:8888/tests/docshell/test/navigation/frame_2_out_of_6.html"></iframe>
+  </body>
+</html>
\ No newline at end of file
diff --git a/docshell/test/navigation/frame_2_out_of_6.html b/docshell/test/navigation/frame_2_out_of_6.html
new file mode 100644
index 0000000000..02056acce8
--- /dev/null
+++ b/docshell/test/navigation/frame_2_out_of_6.html
@@ -0,0 +1,6 @@
+<html>
+  <body>
+    Page 2
+    <iframe style="height: 100vh; width: 100%;" id="static" src="http://sub1.test1.mochi.test:8888/tests/docshell/test/navigation/frame_3_out_of_6.html"></iframe>
+  </body>
+</html>
\ No newline at end of file
diff --git a/docshell/test/navigation/frame_3_out_of_6.html b/docshell/test/navigation/frame_3_out_of_6.html
new file mode 100644
index 0000000000..e9dc308f6e
--- /dev/null
+++ b/docshell/test/navigation/frame_3_out_of_6.html
@@ -0,0 +1,6 @@
+<html>
+  <body>
+    Page 3
+    <iframe style="height: 100vh; width: 100%;" id="static" src="http://sub2.xn--lt-uia.mochi.test:8888/tests/docshell/test/navigation/frame_4_out_of_6.html"></iframe>
+  </body>
+</html>
\ No newline at end of file
diff --git a/docshell/test/navigation/frame_4_out_of_6.html b/docshell/test/navigation/frame_4_out_of_6.html
new file mode 100644
index 0000000000..66a5083e4f
--- /dev/null
+++ b/docshell/test/navigation/frame_4_out_of_6.html
@@ -0,0 +1,6 @@
+<html>
+  <body>
+    Page 4
+    <iframe style="height: 100vh; width: 100%;" id="static" src="http://test2.mochi.test:8888/tests/docshell/test/navigation/frame_5_out_of_6.html"></iframe>
+  </body>
+</html>
\ No newline at end of file
diff --git a/docshell/test/navigation/frame_5_out_of_6.html b/docshell/test/navigation/frame_5_out_of_6.html
new file mode 100644
index 0000000000..0121f0f749
--- /dev/null
+++ b/docshell/test/navigation/frame_5_out_of_6.html
@@ -0,0 +1,6 @@
+<html>
+  <body>
+    Page 5
+    <iframe style="height: 100vh; width: 100%;" id="static" src="http://example.org:80/tests/docshell/test/navigation/frame_6_out_of_6.html"></iframe>
+  </body>
+</html>
\ No newline at end of file
diff --git a/docshell/test/navigation/frame_6_out_of_6.html b/docshell/test/navigation/frame_6_out_of_6.html
new file mode 100644
index 0000000000..c9827ccaae
--- /dev/null
+++ b/docshell/test/navigation/frame_6_out_of_6.html
@@ -0,0 +1,6 @@
+<html>
+  <body>
+    Page 6
+    <iframe style="height: 100vh; width: 100%;" id="static" src="http://example.com/tests/docshell/test/navigation/frame_1_out_of_6.html"></iframe>
+  </body>
+</html>
\ No newline at end of file
diff --git a/docshell/test/navigation/frame_load_as_example_com.html b/docshell/test/navigation/frame_load_as_example_com.html
new file mode 100644
index 0000000000..a1a4e7110a
--- /dev/null
+++ b/docshell/test/navigation/frame_load_as_example_com.html
@@ -0,0 +1,6 @@
+<html>
+  <body>
+    example.com
+    <iframe style="height: 100vh; width:100%;" id="static" src="http://example.org/tests/docshell/test/navigation/frame_load_as_example_org.html"></iframe>
+  </body>
+</html>
diff --git a/docshell/test/navigation/frame_load_as_example_org.html b/docshell/test/navigation/frame_load_as_example_org.html
new file mode 100644
index 0000000000..2fbb8038c9
--- /dev/null
+++ b/docshell/test/navigation/frame_load_as_example_org.html
@@ -0,0 +1,6 @@
+<html>
+  <body>
+    example.org
+    <iframe style="height: 100vh; width:100%;"  id="static" src="http://example.com/tests/docshell/test/navigation/frame_load_as_example_com.html"></iframe>
+  </body>
+</html>
diff --git a/docshell/test/navigation/frame_load_as_host1.html b/docshell/test/navigation/frame_load_as_host1.html
new file mode 100644
index 0000000000..eb006b21a1
--- /dev/null
+++ b/docshell/test/navigation/frame_load_as_host1.html
@@ -0,0 +1,6 @@
+<html>
+  <body>
+    Page 1
+    <iframe style="height: 100vh; width: 100%;" id="static" src="http://example.com/tests/docshell/test/navigation/frame_load_as_host2.html"></iframe>
+  </body>
+</html>
diff --git a/docshell/test/navigation/frame_load_as_host2.html b/docshell/test/navigation/frame_load_as_host2.html
new file mode 100644
index 0000000000..5457c17e9b
--- /dev/null
+++ b/docshell/test/navigation/frame_load_as_host2.html
@@ -0,0 +1,6 @@
+<html>
+  <body>
+    Page 2
+    <iframe style="height: 100vh; width: 100%;" id="static" src="http://test1.mochi.test:8888/tests/docshell/test/navigation/frame_load_as_host3.html"></iframe>
+  </body>
+</html>
diff --git a/docshell/test/navigation/frame_load_as_host3.html b/docshell/test/navigation/frame_load_as_host3.html
new file mode 100644
index 0000000000..a9064ec867
--- /dev/null
+++ b/docshell/test/navigation/frame_load_as_host3.html
@@ -0,0 +1,6 @@
+<html>
+  <body>
+    Page 3
+    <iframe style="height: 100vh; width: 100%;" id="static" src="http://sub1.test1.mochi.test:8888/tests/docshell/test/navigation/frame_load_as_host1.html"></iframe>
+  </body>
+</html>
diff --git a/docshell/test/navigation/frame_recursive.html b/docshell/test/navigation/frame_recursive.html
new file mode 100644
index 0000000000..835d9d63a2
--- /dev/null
+++ b/docshell/test/navigation/frame_recursive.html
@@ -0,0 +1,6 @@
+<html>
+  <body>
+    example.com
+    <iframe style="height: 100vh; width:100%;" id="static" src="http://example.com/tests/docshell/test/navigation/frame_recursive.html"></iframe>
+  </body>
+</html>
diff --git a/docshell/test/navigation/goback.html b/docshell/test/navigation/goback.html
new file mode 100644
index 0000000000..ce2968374e
--- /dev/null
+++ b/docshell/test/navigation/goback.html
@@ -0,0 +1,5 @@
+<html>
+  <body onload="setTimeout('window.history.go(-1)', 1000);">
+    window.history.go(-1);
+  </body>
+</html>
diff --git a/docshell/test/navigation/iframe.html b/docshell/test/navigation/iframe.html
new file mode 100644
index 0000000000..f8fce53c55
--- /dev/null
+++ b/docshell/test/navigation/iframe.html
@@ -0,0 +1,9 @@
+<html>
+<body>
+<script>
+var src = window.location.hash.substring(1);
+// eslint-disable-next-line no-unsanitized/method
+document.write('<iframe src="' + src + '"></iframe>');
+</script>
+</body>
+</html>
diff --git a/docshell/test/navigation/iframe_slow_onload.html b/docshell/test/navigation/iframe_slow_onload.html
new file mode 100644
index 0000000000..e8555699bb
--- /dev/null
+++ b/docshell/test/navigation/iframe_slow_onload.html
@@ -0,0 +1,5 @@
+<html>
+  <body>
+    <iframe id="inner" src="iframe_slow_onload_inner.html">
+  </body>
+</html>
diff --git a/docshell/test/navigation/iframe_slow_onload_inner.html b/docshell/test/navigation/iframe_slow_onload_inner.html
new file mode 100644
index 0000000000..ad39eba795
--- /dev/null
+++ b/docshell/test/navigation/iframe_slow_onload_inner.html
@@ -0,0 +1,19 @@
+<html>
+  <head>
+    <script>
+      function load() {
+        // Let the test page know that it can try to navigate.
+        top.postMessage("onload", "*");
+        // We're starting an infinite loop, but we need to time out after a
+        // while, or the loop will keep running until shutdown.
+        let t0 = performance.now();
+        while (performance.now() - t0 < 5000) {
+            document.getElementById("output").innerText = Math.random();
+        }
+      }
+    </script>
+  </head>
+  <body onload="load()">
+    <p id="output"></p>
+  </body>
+</html>
diff --git a/docshell/test/navigation/iframe_static.html b/docshell/test/navigation/iframe_static.html
new file mode 100644
index 0000000000..1bdd1437c1
--- /dev/null
+++ b/docshell/test/navigation/iframe_static.html
@@ -0,0 +1,8 @@
+<html>
+  <body>
+    Nested Frame
+    <div id="frameContainer">
+      <iframe id="staticFrame" src="frame0.html"></iframe>
+    </div>
+  </body>
+</html>
diff --git a/docshell/test/navigation/mochitest.ini b/docshell/test/navigation/mochitest.ini
new file mode 100644
index 0000000000..1c4fe28309
--- /dev/null
+++ b/docshell/test/navigation/mochitest.ini
@@ -0,0 +1,255 @@
+[DEFAULT]
+support-files =
+  NavigationUtils.js
+  navigation_target_url.html
+  navigation_target_popup_url.html
+  blank.html
+  file_bug386782_contenteditable.html
+  file_bug386782_designmode.html
+  redbox_bug430723.html
+  bluebox_bug430723.html
+  file_bug462076_1.html
+  file_bug462076_2.html
+  file_bug462076_3.html
+  file_bug508537_1.html
+  file_bug534178.html
+  file_document_write_1.html
+  file_fragment_handling_during_load.html
+  file_fragment_handling_during_load_frame1.html
+  file_fragment_handling_during_load_frame2.sjs
+  file_nested_frames.html
+  file_nested_frames_innerframe.html
+  file_shiftReload_and_pushState.html
+  file_static_and_dynamic_1.html
+  frame0.html
+  frame1.html
+  frame2.html
+  frame3.html
+  goback.html
+  iframe.html
+  iframe_static.html
+  navigate.html
+  open.html
+  parent.html
+  file_tell_opener.html
+  file_triggeringprincipal_frame_1.html
+  file_triggeringprincipal_frame_2.html
+  file_triggeringprincipal_subframe.html
+  file_triggeringprincipal_subframe_nav.html
+  file_triggeringprincipal_subframe_same_origin_nav.html
+  file_triggeringprincipal_window_open.html
+  file_triggeringprincipal_parent_iframe_window_open_base.html
+  file_triggeringprincipal_parent_iframe_window_open_nav.html
+  file_triggeringprincipal_iframe_iframe_window_open_frame_a.html
+  file_triggeringprincipal_iframe_iframe_window_open_frame_b.html
+  file_triggeringprincipal_iframe_iframe_window_open_frame_a_nav.html
+  file_load_history_entry_page_with_one_link.html
+  file_load_history_entry_page_with_two_links.html
+  file_bug1300461.html
+  file_bug1300461_redirect.html
+  file_bug1300461_redirect.html^headers^
+  file_bug1300461_back.html
+  file_contentpolicy_block_window.html
+  file_bug1326251.html
+  file_bug1326251_evict_cache.html
+  file_bug1364364-1.html
+  file_bug1364364-2.html
+  file_bug1375833.html
+  file_bug1375833-frame1.html
+  file_bug1375833-frame2.html
+  test_bug145971.html
+  file_bug1609475.html
+  file_bug1379762-1.html
+  file_scrollRestoration_bfcache_and_nobfcache.html
+  file_scrollRestoration_bfcache_and_nobfcache_part2.html
+  file_scrollRestoration_bfcache_and_nobfcache_part2.html^headers^
+  file_scrollRestoration_navigate.html
+  file_scrollRestoration_part1_nobfcache.html
+  file_scrollRestoration_part1_nobfcache.html^headers^
+  file_scrollRestoration_part2_bfcache.html
+  file_scrollRestoration_part3_nobfcache.html
+  file_scrollRestoration_part3_nobfcache.html^headers^
+  file_session_history_on_redirect.html
+  file_session_history_on_redirect.html^headers^
+  file_session_history_on_redirect_2.html
+  file_session_history_on_redirect_2.html^headers^
+  redirect_handlers.sjs
+  frame_load_as_example_com.html
+  frame_load_as_example_org.html
+  frame_load_as_host1.html
+  frame_load_as_host2.html
+  frame_load_as_host3.html
+  frame_1_out_of_6.html
+  frame_2_out_of_6.html
+  frame_3_out_of_6.html
+  frame_4_out_of_6.html
+  frame_5_out_of_6.html
+  frame_6_out_of_6.html
+  frame_recursive.html
+  object_recursive_load.html
+  file_nested_srcdoc.html
+
+[test_aboutblank_change_process.html]
+[test_beforeunload_and_bfcache.html]
+support-files = file_beforeunload_and_bfcache.html
+[test_bug13871.html]
+skip-if =
+  http3
+[test_bug1583110.html]
+support-files = file_bug1583110.html
+[test_bug1706090.html]
+support-files = file_bug1706090.html
+skip-if = sessionHistoryInParent # The test is currently for the old bfcache implementation
+[test_bug1745638.html]
+support-files = file_bug1745638.html
+[test_bug1747019.html]
+support-files =
+  goback.html
+  cache_control_max_age_3600.sjs
+[test_bug1750973.html]
+support-files = file_bug1750973.html
+[test_bug1758664.html]
+support-files = file_bug1758664.html
+skip-if = !sessionHistoryInParent # the old implementation behaves inconsistently
+[test_bug270414.html]
+skip-if =
+  http3
+[test_bug278916.html]
+[test_bug279495.html]
+[test_bug344861.html]
+skip-if = toolkit == "android"
+[test_bug386782.html]
+[test_bug430624.html]
+[test_bug430723.html]
+skip-if =
+  (!debug && (os == 'mac' || os == 'win')) # Bug 874423
+  http3
+[test_bug1364364.html]
+skip-if = (os == "android") # Bug 1560378
+[test_bug1375833.html]
+[test_bug1536471.html]
+support-files = file_bug1536471.html
+[test_blockBFCache.html]
+support-files =
+  file_blockBFCache.html
+  slow.sjs
+  iframe_slow_onload.html
+  iframe_slow_onload_inner.html
+skip-if =
+  http3
+[test_child.html]
+[test_docshell_gotoindex.html]
+support-files = file_docshell_gotoindex.html
+[test_evict_from_bfcache.html]
+support-files = file_evict_from_bfcache.html
+[test_grandchild.html]
+skip-if =
+  http3
+[test_load_history_entry.html]
+[test_meta_refresh.html]
+support-files = file_meta_refresh.html
+[test_navigation_type.html]
+support-files = file_navigation_type.html
+[test_new_shentry_during_history_navigation.html]
+support-files =
+  file_new_shentry_during_history_navigation_1.html
+  file_new_shentry_during_history_navigation_1.html^headers^
+  file_new_shentry_during_history_navigation_2.html
+  file_new_shentry_during_history_navigation_2.html^headers^
+  file_new_shentry_during_history_navigation_3.html
+  file_new_shentry_during_history_navigation_3.html^headers^
+  file_new_shentry_during_history_navigation_4.html
+[test_not-opener.html]
+skip-if =
+  http3
+[test_online_offline_bfcache.html]
+support-files = file_online_offline_bfcache.html
+[test_opener.html]
+skip-if =
+  fission && xorigin  # Bug 1716402 - New fission platform triage
+  os == "linux" && bits == 64 # Bug 1572299
+  win10_2004 # Bug 1572299
+  win11_2009 # Bug 1797751
+  fission && os == "android" # Bug 1827323
+[test_popup-navigates-children.html]
+skip-if =
+  http3
+[test_reload.html]
+support-files = file_reload.html
+[test_reload_nonbfcached_srcdoc.html]
+support-files = file_reload_nonbfcached_srcdoc.sjs
+skip-if =
+  http3
+[test_reserved.html]
+skip-if = 
+  debug  # bug 1263213
+[test_performance_navigation.html]
+[test_same_url.html]
+support-files = file_same_url.html
+[test_session_history_on_redirect.html]
+[test_sessionhistory.html]
+skip-if = verify && (os == 'mac') && debug # Hit MOZ_CRASH(Shutdown too long, probably frozen, causing a crash.) bug 1677545
+[test_dynamic_frame_forward_back.html]
+[test_sessionhistory_document_write.html]
+[test_sessionhistory_iframe_removal.html]
+support-files = file_sessionhistory_iframe_removal.html
+[test_session_history_entry_cleanup.html]
+[test_fragment_handling_during_load.html]
+[test_nested_frames.html]
+skip-if =
+  http3
+[test_shiftReload_and_pushState.html]
+[test_scrollRestoration.html]
+[test_bug1609475.html]
+[test_bug1300461.html]
+[test_bug1326251.html]
+skip-if = toolkit == 'android' || sessionHistoryInParent # It relies on the bfcache
+[test_bug1379762.html]
+[test_state_size.html]
+[test_static_and_dynamic.html]
+skip-if = true # This was disabled for a few years now anyway, bug 1677544
+[test_sibling-matching-parent.html]
+[test_sibling-off-domain.html]
+skip-if =
+  http3
+[test_triggeringprincipal_frame_nav.html]
+skip-if =
+  http3
+[test_triggeringprincipal_frame_same_origin_nav.html]
+skip-if =
+  http3
+[test_triggeringprincipal_window_open.html]
+skip-if =
+  http3
+[test_triggeringprincipal_parent_iframe_window_open.html]
+skip-if =
+  http3
+[test_triggeringprincipal_iframe_iframe_window_open.html]
+skip-if =
+  http3
+[test_contentpolicy_block_window.html]
+[test_rate_limit_location_change.html]
+[test_reload_large_postdata.html]
+support-files =
+  file_reload_large_postdata.sjs
+[test_recursive_frames.html]
+skip-if =
+  http3
+  fission && os == "android" # Bug 1714698
+[test_bug1699721.html]
+skip-if = !fission # tests fission-only process switching behaviour
+[test_ship_beforeunload_fired.html]
+support-files =
+  file_ship_beforeunload_fired.html
+skip-if =
+  !sessionHistoryInParent
+  http3
+[test_ship_beforeunload_fired_2.html]
+support-files =
+  file_ship_beforeunload_fired.html
+skip-if = !sessionHistoryInParent
+[test_ship_beforeunload_fired_3.html]
+support-files =
+  file_ship_beforeunload_fired.html
+skip-if = !sessionHistoryInParent
+[test_open_javascript_noopener.html]
diff --git a/docshell/test/navigation/navigate.html b/docshell/test/navigation/navigate.html
new file mode 100644
index 0000000000..f68123188e
--- /dev/null
+++ b/docshell/test/navigation/navigate.html
@@ -0,0 +1,38 @@
+<html>
+<head>
+    <script src="/tests/SimpleTest/EventUtils.js"></script>
+    <script src="NavigationUtils.js"></script>
+    <script>
+    function navigate() {
+        var args = window.location.hash.substring(1).split(",");
+        var target = args[0];
+        var mechanism = args[1];
+
+        switch (mechanism) {
+        case "location":
+          // eslint-disable-next-line no-eval
+          navigateByLocation(eval(target));
+          break;
+        case "open":
+          navigateByOpen(target);
+          break;
+        case "form":
+          navigateByForm(target);
+          break;
+        case "hyperlink":
+          navigateByHyperlink(target);
+          break;
+        }
+    }
+    </script>
+</head>
+<body onload="navigate();">
+<script>
+var args = window.location.hash.substring(1).split(",");
+var target = args[0];
+var mechanism = args[1];
+// eslint-disable-next-line no-unsanitized/method
+document.write("target=" + target + " mechanism=" + mechanism);
+</script>
+</body>
+</html>
diff --git a/docshell/test/navigation/navigation_target_popup_url.html b/docshell/test/navigation/navigation_target_popup_url.html
new file mode 100644
index 0000000000..cfe6de009d
--- /dev/null
+++ b/docshell/test/navigation/navigation_target_popup_url.html
@@ -0,0 +1 @@
+<html><body>This is a popup</body></html>
diff --git a/docshell/test/navigation/navigation_target_url.html b/docshell/test/navigation/navigation_target_url.html
new file mode 100644
index 0000000000..a485e8133f
--- /dev/null
+++ b/docshell/test/navigation/navigation_target_url.html
@@ -0,0 +1 @@
+<html><body>This frame was navigated.</body></html>
diff --git a/docshell/test/navigation/object_recursive_load.html b/docshell/test/navigation/object_recursive_load.html
new file mode 100644
index 0000000000..3ae9521e63
--- /dev/null
+++ b/docshell/test/navigation/object_recursive_load.html
@@ -0,0 +1,6 @@
+<html>
+  <body width="400" height="300">
+    Frame 0
+    <object id="static" width="400" height="300" data="http://sub2.xn--lt-uia.mochi.test:8888/tests/docshell/test/navigation/object_recursive_load.html"></object> 
+  </body>
+</html>
diff --git a/docshell/test/navigation/open.html b/docshell/test/navigation/open.html
new file mode 100644
index 0000000000..9a96a8dda7
--- /dev/null
+++ b/docshell/test/navigation/open.html
@@ -0,0 +1,10 @@
+<html>
+<body>
+<script>
+var target = window.location.hash.substring(1);
+// eslint-disable-next-line no-unsanitized/method
+document.write("target=" + target);
+window.open("navigation_target_popup_url.html", target, "width=10,height=10");
+</script>
+</body>
+</html>
diff --git a/docshell/test/navigation/parent.html b/docshell/test/navigation/parent.html
new file mode 100644
index 0000000000..74722b8bdf
--- /dev/null
+++ b/docshell/test/navigation/parent.html
@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<html>
+<body>
+This document contains a frame.
+<div><iframe src="blank.html"></iframe></div>
+<script>
+frames[0].name = window.name + "_child0";
+window.onload = function() {
+  opener.postMessage("ready", "*");
+};
+</script>
+</body>
+</html>
+
diff --git a/docshell/test/navigation/redbox_bug430723.html b/docshell/test/navigation/redbox_bug430723.html
new file mode 100644
index 0000000000..c2d1f98092
--- /dev/null
+++ b/docshell/test/navigation/redbox_bug430723.html
@@ -0,0 +1,6 @@
+<html><head>
+<script> window.addEventListener("pageshow", function() { opener.nextTest(); }); </script> 
+</head><body>
+<div style="position:absolute; left:0px; top:0px; width:50%; height:150%; background-color:red">
+<p>This is a very tall red box.</p>
+</div></body></html>
diff --git a/docshell/test/navigation/redirect_handlers.sjs b/docshell/test/navigation/redirect_handlers.sjs
new file mode 100644
index 0000000000..c2b39e61c9
--- /dev/null
+++ b/docshell/test/navigation/redirect_handlers.sjs
@@ -0,0 +1,29 @@
+function handleRequest(request, response) {
+  response.setHeader("Cache-Control", "no-cache", false);
+  response.setHeader("Cache-Control", "no-store", false);
+
+  let state = getState("sessionhistory_do_redirect");
+  if (state != "doredirect") {
+    response.setHeader("Content-Type", "text/html");
+    const contents = `
+      <script>
+        window.onpageshow = function(event) {
+          opener.pageshow();
+        }
+      </script>
+      `;
+    response.write(contents);
+
+    // The next load should do a redirect.
+    setState("sessionhistory_do_redirect", "doredirect");
+  } else {
+    setState("sessionhistory_do_redirect", "");
+
+    response.setStatusLine("1.1", 302, "Found");
+    response.setHeader(
+      "Location",
+      "file_session_history_on_redirect_2.html",
+      false
+    );
+  }
+}
diff --git a/docshell/test/navigation/redirect_to_blank.sjs b/docshell/test/navigation/redirect_to_blank.sjs
new file mode 100644
index 0000000000..b1668401ea
--- /dev/null
+++ b/docshell/test/navigation/redirect_to_blank.sjs
@@ -0,0 +1,6 @@
+function handleRequest(request, response) {
+  response.setHeader("Cache-Control", "no-cache", false);
+  response.setHeader("Cache-Control", "no-store", false);
+  response.setStatusLine("1.1", 302, "Found");
+  response.setHeader("Location", "blank.html", false);
+}
diff --git a/docshell/test/navigation/slow.sjs b/docshell/test/navigation/slow.sjs
new file mode 100644
index 0000000000..9720f807f6
--- /dev/null
+++ b/docshell/test/navigation/slow.sjs
@@ -0,0 +1,16 @@
+function handleRequest(request, response) {
+  response.processAsync();
+
+  let timer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
+  timer.init(
+    function () {
+      response.finish();
+    },
+    5000,
+    Ci.nsITimer.TYPE_ONE_SHOT
+  );
+
+  response.setStatusLine(null, 200, "OK");
+  response.setHeader("Content-Type", "text/plain", false);
+  response.write("Start of the content.");
+}
diff --git a/docshell/test/navigation/test_aboutblank_change_process.html b/docshell/test/navigation/test_aboutblank_change_process.html
new file mode 100644
index 0000000000..61325570f3
--- /dev/null
+++ b/docshell/test/navigation/test_aboutblank_change_process.html
@@ -0,0 +1,46 @@
+<!DOCTYPE html>
+<head>
+  <meta charset="utf-8">
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" href="/tests/SimpleTest/test.css" />
+</head>
+<script>
+// Open a window and navigate it from https://example.com to about:blank
+// With fission, we should switch processes and about:blank should load in
+// the same process as this test page.
+// This is a crash test.
+add_task(async function test_aboutblank_change_process() {
+  let exampleLoaded = new Promise(resolve => {
+    function onMessage(event) {
+      if (event.data == "body-loaded") {
+        window.removeEventListener("message", onMessage);
+        resolve();
+      }
+    }
+    window.addEventListener("message", onMessage);
+  });
+  let win = window.open();
+  win.location = "https://example.com/tests/docshell/test/navigation/file_tell_opener.html";
+  await exampleLoaded;
+
+  win.location = "about:blank";
+
+  // A crash happens somewhere here when about:blank does not go via
+  // DocumentChannel with fission enabled
+
+  // Wait for about:blank to load in this process
+  await SimpleTest.promiseWaitForCondition(() => {
+    try {
+      return win.location.href == "about:blank";
+    } catch (e) {
+      // While the `win` still has example.com page loaded, `win.location` will
+      // be a cross origin object and querying win.location.href will throw a
+      // SecurityError. Return false as long as this is the case.
+      return false;
+    }
+  })
+
+  ok(true, "We did not crash");
+  win.close();
+});
+</script>
diff --git a/docshell/test/navigation/test_beforeunload_and_bfcache.html b/docshell/test/navigation/test_beforeunload_and_bfcache.html
new file mode 100644
index 0000000000..6bb958c6c6
--- /dev/null
+++ b/docshell/test/navigation/test_beforeunload_and_bfcache.html
@@ -0,0 +1,97 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Loading a page from BFCache and firing beforeunload on the current page</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
+  <script>
+  SimpleTest.waitForExplicitFinish();
+
+  /*
+   * This is a simple test to ensure beforeunload is fired on the current page
+   * when restoring a page from bfcache.
+   * (1) The controller page opens a new window. Another page is loaded there
+   *     and session history is navigated back to check whether bfcache is
+   *     enabled. If not, close message is sent and the opened window closes
+   *     and the test ends.
+   * (2) beforeunload event listener is added to the page and history.forward()
+   *     is called. The event listener should send a message to the controller
+   *     page.
+   * (3) Close message is sent to close the opened window and the test finishes.
+   */
+
+  var pageshowCount = 0;
+  var gotBeforeUnload = false;
+  var bfcacheDisabled = false;
+
+
+  function executeTest() {
+    var bc = new BroadcastChannel("beforeunload_and_bfcache");
+    bc.onmessage = function(event) {
+      if (event.data.type == "pageshow") {
+        ++pageshowCount;
+        if (pageshowCount == 1) {
+          bc.postMessage("nextpage");
+        } else if (pageshowCount == 2) {
+          bc.postMessage("back");
+        } else if (pageshowCount == 3) {
+          if (!event.data.persisted) {
+            ok(true, "BFCache not enabled");
+            bfcacheDisabled = true;
+            bc.postMessage("close");
+            return;
+          }
+          bc.postMessage("forward");
+        } else if (pageshowCount == 4) {
+          ok(event.data.persisted, "Should have loaded a page from bfcache.");
+          bc.postMessage("close");
+        }
+      } else if (event.data == "beforeunload") {
+        gotBeforeUnload = true;
+      } else if (event.data == "closed") {
+        isnot(bfcacheDisabled, gotBeforeUnload,
+             "Either BFCache shouldn't be enabled or a beforeunload event should have been fired.");
+        bc.close();
+        SimpleTest.finish();
+      }
+    };
+
+    function runTest() {
+     SpecialPowers.pushPrefEnv({"set": [["docshell.shistory.bfcache.allow_unload_listeners", false]]},
+       function() {
+         window.open("file_beforeunload_and_bfcache.html", "", "noopener");
+       }
+     );
+    }
+    runTest();
+  }
+
+  if (isXOrigin) {
+    // Bug 1746646: Make mochitests work with TCP enabled (cookieBehavior = 5)
+    // Acquire storage access permission here so that the BroadcastChannel used to
+    // communicate with the opened windows works in xorigin tests. Otherwise,
+    // the iframe containing this page is isolated from first-party storage access,
+    // which isolates BroadcastChannel communication.
+    SpecialPowers.wrap(document).notifyUserGestureActivation();
+    SpecialPowers.addPermission("storageAccessAPI", true, window.location.href).then(() => {
+      SpecialPowers.wrap(document).requestStorageAccess().then(() => {
+        SpecialPowers.pushPrefEnv({
+          set: [["privacy.partition.always_partition_third_party_non_cookie_storage", false]]
+        }).then(() => {
+          executeTest();
+        });
+      });
+    });
+  } else {
+    executeTest();
+  }
+
+  </script>
+</head>
+<body>
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+<pre id="test"></pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_blockBFCache.html b/docshell/test/navigation/test_blockBFCache.html
new file mode 100644
index 0000000000..3d4a418369
--- /dev/null
+++ b/docshell/test/navigation/test_blockBFCache.html
@@ -0,0 +1,294 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Blocking pages from entering BFCache</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
+</head>
+<body onload="">
+<script>
+
+const getUserMediaPrefs = {
+  set: [
+    ["media.devices.insecure.enabled", true],
+    ["media.getusermedia.insecure.enabled", true],
+    ["media.navigator.permission.disabled", true],
+  ],
+};
+const msePrefs = {
+  set: [
+    ["media.mediasource.enabled", true],
+    ["media.audio-max-decode-error", 0],
+    ["media.video-max-decode-error", 0],
+  ]
+};
+
+const blockBFCacheTests = [
+  {
+    name: "Request",
+    test: () => {
+      return new Promise((resolve) => {
+        const xhr = new XMLHttpRequest();
+        xhr.open("GET", "slow.sjs");
+        xhr.addEventListener("progress", () => { resolve(xhr); }, { once: true });
+        xhr.send();
+      });
+    },
+  },
+  {
+    name: "Background request",
+    test: () => {
+      return new Promise((resolve) => {
+        const xhr = new XMLHttpRequest();
+        xhr.open("GET", "slow.sjs");
+        xhr.addEventListener("readystatechange", () => { if (xhr.readyState == xhr.HEADERS_RECEIVED) resolve(xhr); });
+        xhr.send();
+      });
+    },
+  },
+  {
+    name: "getUserMedia",
+    prefs: getUserMediaPrefs,
+    test: () => {
+      return navigator.mediaDevices.getUserMedia({ audio: true, fake: true });
+    },
+  },
+  {
+    name: "RTCPeerConnection",
+    test: () => {
+      let pc = new RTCPeerConnection();
+      return pc.createOffer();
+    },
+  },
+  {
+    name: "MSE",
+    prefs: msePrefs,
+    test: () => {
+      const ms = new MediaSource();
+      const el = document.createElement("video");
+      el.src = URL.createObjectURL(ms);
+      el.preload = "auto";
+      return el;
+    },
+  },
+  {
+    name: "WebSpeech",
+    test: () => {
+      return new Promise((resolve) => {
+        const utterance = new SpeechSynthesisUtterance('bfcache');
+        utterance.lang = 'it-IT-noend';
+        utterance.addEventListener('start', () => { resolve(utterance); })
+        speechSynthesis.speak(utterance);
+      });
+    },
+  },
+  {
+    name: "WebVR",
+    prefs: {
+      set: [
+        ["dom.vr.test.enabled", true],
+        ["dom.vr.puppet.enabled", true],
+        ["dom.vr.require-gesture", false],
+      ],
+    },
+    test: () => {
+      return navigator.requestVRServiceTest();
+    }
+  },
+];
+
+if (SpecialPowers.Services.appinfo.fissionAutostart) {
+  blockBFCacheTests.push({
+    name: "Loading OOP iframe",
+    test: () => {
+      return new Promise((resolve) => {
+        const el = document.body.appendChild(document.createElement("iframe"));
+        el.id = "frame";
+        addEventListener("message", ({ data }) => {
+          if (data == "onload") {
+            resolve();
+          }
+        });
+        el.src = "https://example.com/tests/docshell/test/navigation/iframe_slow_onload.html";
+      });
+    },
+    waitForDone: () => {
+      SimpleTest.requestFlakyTimeout("Test has a loop in an onload handler that runs for 5000ms, we need to make sure the loop is done before moving to the next test.");
+      return new Promise(resolve => {
+        setTimeout(resolve, 5000);
+      });
+    },
+  });
+}
+
+const dontBlockBFCacheTests = [
+  {
+    name: "getUserMedia",
+    prefs: getUserMediaPrefs,
+    test: () => {
+      return navigator.mediaDevices.getUserMedia({ video: true, fake: true }).then(stream => {
+        stream.getTracks().forEach(track => track.stop());
+        return stream;
+      });
+    },
+  },
+/*
+  Disabled because MediaKeys rely on being destroyed by the CC before they
+  notify their window, so the test would intermittently fail depending on
+  when the CC runs.
+
+  {
+    name: "MSE",
+    prefs: msePrefs,
+    test: () => {
+      return new Promise((resolve) => {
+        const ms = new MediaSource();
+        const el = document.createElement("video");
+        ms.addEventListener("sourceopen", () => { resolve(el) }, { once: true });
+        el.src = URL.createObjectURL(ms);
+        el.preload = "auto";
+      }).then(el => {
+        el.src = "";
+        return el;
+      });
+    },
+  },
+*/
+];
+
+
+
+function executeTest() {
+
+  let bc = new BroadcastChannel("bfcache_blocking");
+
+  function promiseMessage(type) {
+    return new Promise((resolve, reject) => {
+      bc.addEventListener("message", (e) => {
+        if (e.data.type == type) {
+          resolve(e.data);
+        }
+      }, { once: true });
+    });
+  }
+
+  function promisePageShow(shouldBePersisted) {
+    return promiseMessage("pageshow").then(data => data.persisted == shouldBePersisted);
+  }
+
+  function promisePageShowFromBFCache(e) {
+    return promisePageShow(true);
+  }
+
+  function promisePageShowNotFromBFCache(e) {
+    return promisePageShow(false);
+  }
+
+  function runTests(testArray, shouldBlockBFCache) {
+    for (const { name, prefs = {}, test, waitForDone } of testArray) {
+      add_task(async function() {
+        await SpecialPowers.pushPrefEnv(prefs, async function() {
+          // Load a mostly blank page that we can communicate with over
+          // BroadcastChannel (though it will close the BroadcastChannel after
+          // receiving the next "load" message, to avoid blocking BFCache).
+          let loaded = promisePageShowNotFromBFCache();
+          window.open("file_blockBFCache.html", "", "noopener");
+          await loaded;
+
+          // Load the same page with a different URL.
+          loaded = promisePageShowNotFromBFCache();
+          bc.postMessage({ message: "load", url: `file_blockBFCache.html?${name}_${shouldBlockBFCache}` });
+          await loaded;
+
+          // Run test script in the second page.
+          bc.postMessage({ message: "runScript", fun: test.toString() });
+          await promiseMessage("runScriptDone");
+
+          // Go back to the first page (this should just come from the BFCache).
+          let goneBack = promisePageShowFromBFCache();
+          bc.postMessage({ message: "back" });
+          await goneBack;
+
+          // Go forward again to the second page and check that it does/doesn't come
+          // from the BFCache.
+          let goneForward = promisePageShow(!shouldBlockBFCache);
+          bc.postMessage({ message: "forward" });
+          let result = await goneForward;
+          ok(result, `Page ${shouldBlockBFCache ? "should" : "should not"} have been blocked from going into the BFCache (${name})`);
+
+          // If the test will keep running after navigation, then we need to make
+          // sure it's completely done before moving to the next test, to avoid
+          // interfering with any following tests. If waitForDone is defined then
+          // it'll return a Promise that we can use to wait for the end of the
+          // test.
+          if (waitForDone) {
+            await waitForDone();
+          }
+
+          // Do a similar test, but replace the bfcache test page with a new page,
+          // not a page coming from the session history.
+
+          // Load the same page with a different URL.
+          loaded = promisePageShowNotFromBFCache();
+          bc.postMessage({ message: "load", url: `file_blockBFCache.html?p2_${name}_${shouldBlockBFCache}` });
+          await loaded;
+
+          // Run the test script.
+          bc.postMessage({ message: "runScript", fun: test.toString() });
+          await promiseMessage("runScriptDone");
+
+          // Load a new page.
+          loaded = promisePageShowNotFromBFCache();
+          bc.postMessage({ message: "load", url: "file_blockBFCache.html" });
+          await loaded;
+
+          // Go back to the previous page and check that it does/doesn't come
+          // from the BFCache.
+          goneBack = promisePageShow(!shouldBlockBFCache);
+          bc.postMessage({ message: "back" });
+          result = await goneBack;
+          ok(result, `Page ${shouldBlockBFCache ? "should" : "should not"} have been blocked from going into the BFCache (${name})`);
+
+          if (waitForDone) {
+            await waitForDone();
+          }
+
+          bc.postMessage({ message: "close" });
+
+          SpecialPowers.popPrefEnv();
+        });
+      });
+    }
+  }
+
+  // If Fission is disabled, the pref is no-op.
+  SpecialPowers.pushPrefEnv({set: [["fission.bfcacheInParent", true]]}, () => {
+    runTests(blockBFCacheTests, true);
+    runTests(dontBlockBFCacheTests, false);
+  });
+}
+
+if (isXOrigin) {
+  // Bug 1746646: Make mochitests work with TCP enabled (cookieBehavior = 5)
+  // Acquire storage access permission here so that the BroadcastChannel used to
+  // communicate with the opened windows works in xorigin tests. Otherwise,
+  // the iframe containing this page is isolated from first-party storage access,
+  // which isolates BroadcastChannel communication.
+  SpecialPowers.wrap(document).notifyUserGestureActivation();
+  SpecialPowers.addPermission("storageAccessAPI", true, window.location.href).then(() => {
+    SpecialPowers.wrap(document).requestStorageAccess().then(() => {
+      SpecialPowers.pushPrefEnv({
+        set: [["privacy.partition.always_partition_third_party_non_cookie_storage", false]]
+      }).then(() => {
+        executeTest();
+      });
+    });
+  });
+} else {
+  executeTest();
+}
+
+</script>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_bug1300461.html b/docshell/test/navigation/test_bug1300461.html
new file mode 100644
index 0000000000..22783c07c2
--- /dev/null
+++ b/docshell/test/navigation/test_bug1300461.html
@@ -0,0 +1,70 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=
+-->
+<head>
+  <title>Test for Bug 1300461</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body onload="runTest()">
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1300461">Mozilla Bug 1300461</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+
+</div>
+<pre id="test">
+  <script type="application/javascript">
+
+    let chromeScript = null;
+    if (SpecialPowers.Services.appinfo.sessionHistoryInParent) {
+      chromeScript = SpecialPowers.loadChromeScript(() => {
+        /* eslint-env mozilla/chrome-script */
+        function doSend(message, fn) {
+          try {
+            sendAsyncMessage(message, {success: true, value: fn()});
+          } catch(_) {
+            sendAsyncMessage(message, {success: false});
+          }
+        }
+
+        addMessageListener("requestedIndex", (id) => {
+          doSend("requestedIndex", () => {
+            let shistory = BrowsingContext.get(id).top.sessionHistory;
+            return shistory.requestedIndex;
+          })
+        });
+      });
+    }
+
+    async function getSHRequestedIndex(browsingContextId) {
+      let p = chromeScript.promiseOneMessage("requestedIndex");
+      chromeScript.sendAsyncMessage("requestedIndex", browsingContextId);
+      let result = await p;
+      ok(result.success, "Got requested index from parent");
+      return result.value;
+    }
+
+    var testCount = 0;
+
+    SimpleTest.waitForExplicitFinish();
+
+    var testWindow;
+    function runTest() {
+      testWindow = window.open("file_bug1300461.html", "", "width=360,height=480");
+      testWindow.onunload = function() { }; // to prevent bfcache
+    }
+
+    function finishTest() {
+      if (chromeScript) {
+        chromeScript.destroy();
+      }
+      testWindow.close();
+      SimpleTest.finish();
+    }
+
+  </script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_bug1326251.html b/docshell/test/navigation/test_bug1326251.html
new file mode 100644
index 0000000000..3c951729e6
--- /dev/null
+++ b/docshell/test/navigation/test_bug1326251.html
@@ -0,0 +1,47 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=
+-->
+<head>
+  <title>Test for Bug 1326251</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body onload="runTest()">
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1326251">Mozilla Bug 1326251</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+
+</div>
+<pre id="test">
+  <script type="application/javascript">
+
+    var testCount = 0;
+
+    var bc = new BroadcastChannel("file_bug1326251");
+    bc.onmessage = function(event) {
+      if (event.data == "requestNextTest") {
+        bc.postMessage({ nextTest: testCount++ });
+      } else if (event.data.type == "is") {
+        is(event.data.value1, event.data.value2, event.data.message);
+      } else if (event.data.type == "ok") {
+        ok(event.data.value, event.data.message);
+      } else if (event.data == "finishTest") {
+        SimpleTest.finish();
+      }
+    }
+
+    SimpleTest.waitForExplicitFinish();
+
+    function runTest() {
+      // If Fission is disabled, the pref is no-op.
+      SpecialPowers.pushPrefEnv({set: [["fission.bfcacheInParent", true]]}, () => {
+        window.open("file_bug1326251.html", "", "width=360,height=480,noopener");
+      });
+    }
+
+  </script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_bug1364364.html b/docshell/test/navigation/test_bug1364364.html
new file mode 100644
index 0000000000..90d2009df4
--- /dev/null
+++ b/docshell/test/navigation/test_bug1364364.html
@@ -0,0 +1,65 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=1364364
+-->
+<head>
+  <meta charset="utf-8">
+  <title>Test for Bug 1364364</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+  <script type="application/javascript">
+
+  /** Test for Bug 1364364 */
+  let testWin, testDoc;
+  async function test() {
+    SimpleTest.waitForExplicitFinish();
+    if (SpecialPowers.Services.appinfo.sessionHistoryInParent) {
+      // This test relies on the possibility to modify the bfcached document.
+      // The new implementation is more restricted and thus works only
+      // when the bfcached browsing context is the only top level one
+      // in the browsing context group.
+      ok(true, "This test is for the old bfcache implementation only.");
+      SimpleTest.finish();
+      return;
+    }
+    testWin = window.open("file_bug1364364-1.html");
+    await waitForLoad(testWin);
+    testDoc = testWin.document;
+
+    // file_bug1364364-1.html will load a few dynamic iframes and then navigate
+    // top browsing context to file_bug1364364-2.html, which will postMessage
+    // back.
+  }
+
+  function waitForLoad(win) {
+    return new Promise(r => win.addEventListener("load", r, { once: true}));
+  }
+
+  window.addEventListener("message", async function(msg) {
+    if (msg.data == "navigation-done") {
+      is(testWin.history.length, 6, "check history.length");
+
+      // Modify a document in bfcache should cause the cache being dropped tho
+      // RemoveFromBFCacheAsync.
+      testDoc.querySelector("#content").textContent = "modified";
+      await new Promise(r => setTimeout(r, 0));
+
+      is(testWin.history.length, 2, "check history.length after bfcache dropped");
+      testWin.close();
+      SimpleTest.finish();
+    }
+  });
+
+  </script>
+</head>
+<body onload="test();">
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1364364">Mozilla Bug 1364364</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+
+</div>
+<pre id="test">
+</pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_bug1375833.html b/docshell/test/navigation/test_bug1375833.html
new file mode 100644
index 0000000000..c2a7750a4e
--- /dev/null
+++ b/docshell/test/navigation/test_bug1375833.html
@@ -0,0 +1,131 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=1375833
+-->
+<head>
+  <meta charset="utf-8">
+  <title>Test for Bug 1375833</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+  <script type="application/javascript">
+
+    SimpleTest.waitForExplicitFinish();
+
+    /**
+     * Test for Bug 1375833. It tests for 2 things in a normal reload -
+     * 1. Static frame history should not be dropped.
+     * 2. In a reload, docshell would parse the reloaded root document and
+     *    genearate new child docshells, and then use the child offset
+     */
+
+    let testWin = window.open("file_bug1375833.html");
+    let count = 0;
+    let webNav, shistory;
+    let frameDocShellId;
+    let chromeScript = null;
+    if (SpecialPowers.Services.appinfo.sessionHistoryInParent) {
+      chromeScript = SpecialPowers.loadChromeScript(() => {
+        /* eslint-env mozilla/chrome-script */
+        function doSend(message, fn) {
+          try {
+            sendAsyncMessage(message, {success: true, value: fn()});
+          } catch(_) {
+            sendAsyncMessage(message, {success: false});
+          }
+        }
+
+        addMessageListener("test1", id => {
+          doSend("test1", () => {
+            let sessionHistory = BrowsingContext.get(id).top.sessionHistory;
+            let entry = sessionHistory.getEntryAtIndex(sessionHistory.index);
+            let frameEntry = entry.GetChildAt(0);
+            return String(frameEntry.docshellID);
+          })
+        });
+      });
+    }
+
+    window.addEventListener("message", async e => {
+      switch (count++) {
+        case 0:
+          ok(e.data.endsWith("file_bug1375833-frame2.html"), "check location");
+
+          webNav = SpecialPowers.wrap(testWin)
+                                .docShell
+                                .QueryInterface(SpecialPowers.Ci.nsIWebNavigation);
+          shistory = webNav.sessionHistory;
+          is(shistory.count, 2, "check history length");
+          is(shistory.index, 1, "check history index");
+
+          frameDocShellId = String(getFrameDocShell().historyID);
+          ok(frameDocShellId, "sanity check for docshell ID");
+
+          testWin.location.reload();
+          break;
+        case 1:
+          ok(e.data.endsWith("file_bug1375833-frame2.html"), "check location");
+          is(shistory.count, 4, "check history length");
+          is(shistory.index, 3, "check history index");
+
+          let newFrameDocShellId = String(getFrameDocShell().historyID);
+          ok(newFrameDocShellId, "sanity check for docshell ID");
+          is(newFrameDocShellId, frameDocShellId, "check docshell ID remains after reload");
+
+          if (!SpecialPowers.Services.appinfo.sessionHistoryInParent) {
+            let entry = shistory.legacySHistory.getEntryAtIndex(shistory.index);
+            let frameEntry = entry.GetChildAt(0);
+            is(String(frameEntry.docshellID), frameDocShellId, "check newly added shentry uses the same docshell ID");
+          } else {
+            let p = chromeScript.promiseOneMessage("test1");
+            chromeScript.sendAsyncMessage("test1", SpecialPowers.wrap(testWin).browsingContext.id);
+            let result = await p;
+            ok(result.success, "legacySHistory worked around ok");
+            is(result.value, frameDocShellId, "check newly added shentry uses the same docshell ID");
+          }
+
+          webNav.goBack();
+          break;
+        case 2:
+          ok(e.data.endsWith("file_bug1375833-frame1.html"), "check location");
+          is(shistory.count, 4, "check history length");
+          is(shistory.index, 2, "check history index");
+
+          webNav.goBack();
+          break;
+        case 3:
+          ok(e.data.endsWith("file_bug1375833-frame2.html"), "check location");
+          is(shistory.count, 4, "check history length");
+          is(shistory.index, 1, "check history index");
+
+          webNav.goBack();
+          break;
+        case 4:
+          ok(e.data.endsWith("file_bug1375833-frame1.html"), "check location");
+          is(shistory.count, 4, "check history length");
+          is(shistory.index, 0, "check history index");
+
+          if (chromeScript) {
+            chromeScript.destroy();
+          }
+          testWin.close();
+          SimpleTest.finish();
+      }
+    });
+
+    function getFrameDocShell() {
+      return SpecialPowers.wrap(testWin.window[0]).docShell;
+    }
+
+  </script>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1375833">Mozilla Bug 1375833</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+
+</div>
+<pre id="test">
+</pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_bug1379762.html b/docshell/test/navigation/test_bug1379762.html
new file mode 100644
index 0000000000..eda3b539a5
--- /dev/null
+++ b/docshell/test/navigation/test_bug1379762.html
@@ -0,0 +1,67 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=
+-->
+<head>
+  <title>Test for Bug 1379762</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body onload="runTest()">
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1379762">Mozilla Bug 1379762</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+
+</div>
+<pre id="test">
+  <script type="application/javascript">
+    /**
+     * - This page opens new window
+     * - new window sends 'init' msg
+     * - onload() in new window sends 'increment_loadCount' msg
+     * - onpageshow() in new window sends 'increment_testCount' msg
+     * - This page sends 'forward_back' msg
+     * - onpageshow() in new window 'increment_testCount'
+     * - This page sends 'finish_test' msg
+     * - onpageshow() in new window sends 'finished' msg
+     */
+    var testCount = 0; // Used by the test files.
+    var loadCount = 0;
+    var goneBack = false;
+    var bc = new BroadcastChannel("bug1379762");
+    bc.onmessage = (messageEvent) => {
+      let message = messageEvent.data;
+      if (message == "init") {
+        is(testCount, 0, "new window should only be loaded once; otherwise the loadCount variable makes no sense");
+      } else if (message == "increment_loadCount") {
+        loadCount++;
+        is(loadCount, 1, "Should only get one load")
+      } else if (message == 'increment_testCount') {
+        testCount++;
+        if (testCount == 1) {
+          bc.postMessage("forward_back");
+          goneBack = true;
+        } else if (testCount == 2) {
+          ok(goneBack, "We had a chance to navigate backwards and forwards in the new window to test BFCache");
+          bc.postMessage("finish_test");
+        }
+      } else if (message == "finished") {
+        bc.close();
+        SimpleTest.finish();
+      }
+    }
+
+    SimpleTest.waitForExplicitFinish();
+
+    function runTest() {
+      // If Fission is disabled, the pref is no-op.
+      SpecialPowers.pushPrefEnv({set: [["fission.bfcacheInParent", true]]}, () => {
+        window.open("file_bug1379762-1.html", "", "width=360,height=480,noopener");
+      });
+    }
+
+  </script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_bug13871.html b/docshell/test/navigation/test_bug13871.html
new file mode 100644
index 0000000000..0532bc7b56
--- /dev/null
+++ b/docshell/test/navigation/test_bug13871.html
@@ -0,0 +1,85 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <script src="/tests/SimpleTest/SimpleTest.js"></script>
+    <script src="/tests/SimpleTest/EventUtils.js"></script>
+    <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+    <script type="text/javascript" src="NavigationUtils.js"></script>
+    <style type="text/css">
+      iframe { width: 90%; height: 50px; }
+    </style>
+<script>
+async function runTest() {
+  navigateByLocation(window0.frames[0]);
+  navigateByOpen("window1_child0");
+  navigateByForm("window2_child0");
+  navigateByHyperlink("window3_child0");
+
+  await waitForFinishedFrames(4);
+
+  isInaccessible(window0.frames[0], "Should not be able to navigate off-domain frame by setting location.");
+  isInaccessible(window1.frames[0], "Should not be able to navigate off-domain frame by calling window.open.");
+  isInaccessible(window2.frames[0], "Should not be able to navigate off-domain frame by submitting form.");
+  isInaccessible(window3.frames[0], "Should not be able to navigate off-domain frame by targeted hyperlink.");
+
+  window0.close();
+  window1.close();
+  window2.close();
+  window3.close();
+
+  await cleanupWindows();
+  SimpleTest.finish();
+}
+
+// Because our open()'d windows are cross-origin, we can't wait for onload.
+// We instead wait for a postMessage from parent.html.
+var windows = new Map();
+addEventListener("message", function windowLoaded(evt) {
+  // Because window.open spins the event loop in order to open new windows,
+  // we might receive the "ready" message before we call waitForLoad.
+  // In that case, windows won't contain evt.source and we just note that the
+  // window is ready. Otherwise, windows contains the "resolve" function for
+  // that window's promise and we just have to call it.
+  if (windows.has(evt.source)) {
+    windows.get(evt.source)();
+  } else {
+    windows.set(evt.source, true);
+  }
+});
+
+// eslint-disable-next-line @microsoft/sdl/no-insecure-url
+var window0 = window.open("http://test1.example.org:80/tests/docshell/test/navigation/parent.html", "window0", "width=10,height=10");
+// eslint-disable-next-line @microsoft/sdl/no-insecure-url
+var window1 = window.open("http://test1.example.org:80/tests/docshell/test/navigation/parent.html", "window1", "width=10,height=10");
+// eslint-disable-next-line @microsoft/sdl/no-insecure-url
+var window2 = window.open("http://test1.example.org:80/tests/docshell/test/navigation/parent.html", "window2", "width=10,height=10");
+// eslint-disable-next-line @microsoft/sdl/no-insecure-url
+var window3 = window.open("http://test1.example.org:80/tests/docshell/test/navigation/parent.html", "window3", "width=10,height=10");
+
+function waitForLoad(w) {
+  return new Promise(function(resolve, reject) {
+    // If we already got the "ready" message, resolve immediately.
+    if (windows.has(w)) {
+      resolve();
+    } else {
+      windows.set(w, resolve);
+    }
+  });
+}
+
+Promise.all([ waitForLoad(window0),
+              waitForLoad(window1),
+              waitForLoad(window2),
+              waitForLoad(window3) ])
+       .then(runTest);
+</script>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=13871">Mozilla Bug 13871</a>
+<pre id="test">
+<script type="text/javascript">
+SimpleTest.waitForExplicitFinish();
+</script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_bug145971.html b/docshell/test/navigation/test_bug145971.html
new file mode 100644
index 0000000000..ffad27a9c3
--- /dev/null
+++ b/docshell/test/navigation/test_bug145971.html
@@ -0,0 +1,29 @@
+<html>
+  <head>
+    <script>
+      let pass = false;
+      let initialLoad = false;
+      var bc = new BroadcastChannel("bug145971");
+      function checkNavigationTypeEquals2() {
+        if (performance.navigation.type == 2) {
+          pass = true;
+        }
+        testDone();
+      }
+
+      function testDone() {
+        bc.postMessage({result: pass});
+        bc.close();
+        window.close();
+      }
+
+      function test() {
+        window.onpageshow = checkNavigationTypeEquals2;
+        window.location.href = 'goback.html';
+      }
+    </script>
+  </head>
+  <body onload="setTimeout(test, 0);">
+  Testing bug 145971.
+  </body>
+</html>
diff --git a/docshell/test/navigation/test_bug1536471.html b/docshell/test/navigation/test_bug1536471.html
new file mode 100644
index 0000000000..f37aedba21
--- /dev/null
+++ b/docshell/test/navigation/test_bug1536471.html
@@ -0,0 +1,75 @@
+
+<!DOCTYPE HTML>
+<html>
+    <!--
+        https://bugzilla.mozilla.org/show_bug.cgi?id=1536471
+        -->
+<head>
+    <title>Test for Bug 1536471</title>
+    <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+    <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+    <script type="application/javascript">
+
+    let testWin;
+    async function test() {
+        // Open a new tab and load a document with an iframe inside
+        testWin = window.open("file_bug1536471.html");
+        await waitForLoad();
+        var iframe = testWin.document.getElementById("staticFrame");
+        is(testWin.history.length, 1, "Checking the number of session history entries when there is only one iframe");
+
+        // Navigate the iframe to different pages
+        await loadUriInFrame(iframe, "frame1.html");
+        is(testWin.history.length, 2, "Checking the number of session history entries after having navigated a single iframe 1 time");
+        await loadUriInFrame(iframe, "frame2.html");
+        is(testWin.history.length, 3, "Checking the number of session history entries after having navigated a single iframe 2 times");
+        await loadUriInFrame(iframe, "frame3.html");
+        is(testWin.history.length, 4, "Checking the number of session history entries after having navigated a single iframe 3 times");
+
+        // Reload the top document
+        testWin.location.reload(true);
+        await waitForLoad();
+        is(testWin.history.length, 1, "Checking the number of session history entries after reloading the top document");
+
+        testWin.close();
+        SimpleTest.finish();
+    }
+
+    async function waitForLoad() {
+        await new Promise(resolve => {
+            window.bodyOnLoad = function() {
+                setTimeout(resolve, 0);
+                window.bodyOnLoad = undefined;
+            };
+        });
+    }
+
+    async function iframeOnload(frame) {
+      return new Promise(resolve => {
+        frame.addEventListener("load", () => {
+            setTimeout(resolve, 0);
+        }, {once: true});
+      });
+    }
+
+    async function loadUriInFrame(frame, uri) {
+      let onloadPromise = iframeOnload(frame);
+      frame.src = uri;
+      await onloadPromise;
+    }
+    </script>
+</head>
+
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1536471">Mozilla Bug </a>
+<p id="display"></p>
+<div id="content" style="display: none">
+</div>
+<pre id="test">
+<script type="text/javascript">
+SimpleTest.waitForExplicitFinish();
+</script>
+</pre>
+<body onload="test()">
+</body>
+</html>
+
diff --git a/docshell/test/navigation/test_bug1583110.html b/docshell/test/navigation/test_bug1583110.html
new file mode 100644
index 0000000000..f1c1b65e4d
--- /dev/null
+++ b/docshell/test/navigation/test_bug1583110.html
@@ -0,0 +1,36 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>test bug 1583110</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
+  <script>
+    SimpleTest.waitForExplicitFinish();
+    var bc = new BroadcastChannel("bug1583110");
+    var pageshowCount = 0;
+    bc.onmessage = function(event) {
+      ok(event.data.type == "pageshow");
+      ++pageshowCount;
+      if (pageshowCount == 1) {
+        bc.postMessage("loadnext");
+      } else if (pageshowCount == 2) {
+        bc.postMessage("back");
+      } else {
+        ok(event.data.persisted, "Should have persisted the first page");
+        bc.close();
+        SimpleTest.finish();
+      }
+    }
+
+    function test() {
+      window.open("file_bug1583110.html", "", "noopener");
+    }
+  </script>
+</head>
+<body onload="test()">
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+<pre id="test"></pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_bug1609475.html b/docshell/test/navigation/test_bug1609475.html
new file mode 100644
index 0000000000..4dbe7d17d6
--- /dev/null
+++ b/docshell/test/navigation/test_bug1609475.html
@@ -0,0 +1,35 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=
+-->
+<head>
+  <title>Test for Bug 1609475</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body onload="runTest()">
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1609475">Mozilla Bug 1609475</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+
+</div>
+<pre id="test">
+  <script type="application/javascript">
+    SimpleTest.waitForExplicitFinish();
+
+    var testWindow;
+    function runTest() {
+        testWindow = window.open("file_bug1609475.html", "", "width=360,height=480");
+        testWindow.onunload = function() { }; // to prevent bfcache
+    }
+
+    function finishTest() {
+      testWindow.close();
+      SimpleTest.finish();
+    }
+
+  </script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_bug1699721.html b/docshell/test/navigation/test_bug1699721.html
new file mode 100644
index 0000000000..687c5306cf
--- /dev/null
+++ b/docshell/test/navigation/test_bug1699721.html
@@ -0,0 +1,110 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <script src="/tests/SimpleTest/SimpleTest.js"></script>
+    <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<pre id="test">
+<script type="text/javascript">
+  add_task(async function() {
+    let popup = window.open("blank.html");
+
+    info("opened popup");
+    await new Promise(resolve => {
+      popup.addEventListener("load", resolve, { once: true });
+    });
+
+    info("popup blank.html loaded");
+    let tell_opener = new URL("file_tell_opener.html", location.href);
+    // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+    let xorigin_url = new URL(tell_opener.pathname, "http://example.com");
+
+    let resolveStartedUnload;
+    let startedUnload = new Promise(resolve => {
+      resolveStartedUnload = resolve;
+    });
+    let didFinishUnload = false;
+
+    let finishUnload = false;
+    popup.addEventListener("unload", function() {
+      resolveStartedUnload();
+      try {
+        // Spin a nested event loop in unload until we set `finishUnload`.
+        SpecialPowers.Services.tm.spinEventLoopUntil(
+          "Test(test_switch_back_nested.html)", () => finishUnload);
+      } finally {
+        info("exiting from unload nested event loop...");
+        didFinishUnload = true;
+      }
+    });
+
+    info("wait for message from popup");
+    let messagePromise = new Promise(resolve => {
+      addEventListener("message", evt => {
+        resolve();
+      }, { once: true });
+    });
+    popup.location = xorigin_url.href;
+    await messagePromise;
+
+    info("popup loaded, ensuring we're in unload");
+    await startedUnload;
+    is(didFinishUnload, false, "unload shouldn't have finished");
+
+    let switchStarted = SpecialPowers.spawnChrome([], async () => {
+      await new Promise(resolve => {
+        async function observer(subject, topic) {
+          is(topic, "http-on-examine-response");
+
+          let uri = subject.QueryInterface(Ci.nsIChannel).URI;
+          if (!uri.filePath.endsWith("file_tell_opener.html")) {
+            return;
+          }
+
+          Services.obs.removeObserver(observer, "http-on-examine-response");
+
+          // spin the event loop a few times to ensure we resolve after the process switch
+          for (let i = 0; i < 10; ++i) {
+            await new Promise(res => Services.tm.dispatchToMainThread(res));
+          }
+
+          info("resolving!");
+          resolve();
+        }
+        Services.obs.addObserver(observer, "http-on-examine-response");
+      });
+    });
+
+    info("Navigating back to the current process");
+    await SpecialPowers.spawn(popup, [tell_opener.href], (href) => {
+      content.location.href = href;
+    });
+
+    let messagePromise2 = new Promise(resolve => {
+      addEventListener("message", evt => {
+        resolve();
+      }, { once: true });
+    });
+
+    info("Waiting for the process switch to start");
+    await switchStarted;
+
+    // Finish unloading, and wait for the unload to complete
+    is(didFinishUnload, false, "unload shouldn't be finished");
+    finishUnload = true;
+    await new Promise(resolve => setTimeout(resolve, 0));
+    is(didFinishUnload, true, "unload should be finished");
+
+    info("waiting for navigation to complete");
+    await messagePromise2;
+
+    info("closing popup");
+    popup.close();
+
+    ok(true, "Didn't crash");
+  });
+</script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_bug1706090.html b/docshell/test/navigation/test_bug1706090.html
new file mode 100644
index 0000000000..293148b9c6
--- /dev/null
+++ b/docshell/test/navigation/test_bug1706090.html
@@ -0,0 +1,49 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Bug 1706090</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
+  <script>
+  SimpleTest.waitForExplicitFinish();
+
+  var bc = new BroadcastChannel("bug1706090");
+  var pageshowCount = 0;
+  bc.onmessage = function(event) {
+    if (event.data.type == "pageshow") {
+      ++pageshowCount;
+      if (pageshowCount == 1) {
+        is(event.data.persisted, false, "Shouldn't have persisted the initial load.");
+        bc.postMessage("sameOrigin");
+      } else if (pageshowCount == 2) {
+        bc.postMessage("back");
+      } else if (pageshowCount == 3) {
+        is(event.data.persisted, false, "Shouldn't have persisted same origin load.");
+        bc.postMessage("crossOrigin");
+      } else if (pageshowCount == 4) {
+        is(event.data.persisted, true, "Should have persisted cross origin load.");
+        bc.postMessage("sameSite");
+      } else if (pageshowCount == 5) {
+        is(event.data.persisted, false, "Shouldn't have persisted same site load.");
+        bc.postMessage("close");
+      }
+    } else if (event.data == "closed") {
+      bc.close();
+      SimpleTest.finish();
+    }
+  };
+
+  function runTest() {
+    SpecialPowers.pushPrefEnv({set: [["docshell.shistory.bfcache.allow_unload_listeners", true]]}, () => {
+      window.open("file_bug1706090.html", "", "noopener");
+    });
+  }
+  </script>
+</head>
+<body onload="runTest()">
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+<pre id="test"></pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_bug1745638.html b/docshell/test/navigation/test_bug1745638.html
new file mode 100644
index 0000000000..594c464da3
--- /dev/null
+++ b/docshell/test/navigation/test_bug1745638.html
@@ -0,0 +1,40 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>bug 1745638</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
+  <script>
+  // This test triggers an assertion in the old session history
+  // implementation.
+  SimpleTest.expectAssertions(0, 1);
+
+  SimpleTest.waitForExplicitFinish();
+  var testWindow;
+  var loadCount = 0;
+  function test() {
+    testWindow = window.open("file_bug1745638.html");
+  }
+
+  function pageLoaded() {
+    ++loadCount;
+    is(testWindow.document.getElementById('testFrame').contentDocument.body.innerHTML,
+       "passed",
+       "Iframe's textual content should be 'passed'.");
+    if (loadCount == 1) {
+      testWindow.history.go(0);
+    } else {
+      testWindow.close();
+      SimpleTest.finish();
+    }
+  }
+
+  </script>
+</head>
+<body onload="test()">
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+<pre id="test"></pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_bug1747019.html b/docshell/test/navigation/test_bug1747019.html
new file mode 100644
index 0000000000..c7995737df
--- /dev/null
+++ b/docshell/test/navigation/test_bug1747019.html
@@ -0,0 +1,48 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Test session history and caching</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
+  <script>
+    SimpleTest.waitForExplicitFinish();
+
+    var win;
+    var loadCount = 0;
+    var initialContent;
+    // The test loads first a page in a new window, then using
+    // form submission loads another page and then using form submission
+    // again loads third page. That page triggers history.go(-1).
+    // The second page is loaded now again and should have the same content
+    // as it had before.
+    function test() {
+      win = window.open("cache_control_max_age_3600.sjs?initial");
+      window.onmessage = (e) => {
+        is(e.data, "loaded", "Should get load message 'loaded'");
+        ++loadCount;
+        if (loadCount == 1) {
+          win.document.forms[0].submit();
+        } else if (loadCount == 2) {
+          initialContent = win.document.body.textContent;
+          info("The initial content is [" + initialContent + "].");
+          win.document.forms[0].submit();
+        } else if (loadCount == 3) {
+          let newContent = win.document.body.textContent;
+          info("The new content is [" + newContent + "].");
+          win.close();
+          is(initialContent, newContent, "Should have loaded the page from cache.");
+          SimpleTest.finish();
+        } else {
+          ok(false, "Unexpected load count.");
+        }
+      }
+    }
+  </script>
+</head>
+<body onload="test()">
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+<pre id="test"></pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_bug1750973.html b/docshell/test/navigation/test_bug1750973.html
new file mode 100644
index 0000000000..9f87075b90
--- /dev/null
+++ b/docshell/test/navigation/test_bug1750973.html
@@ -0,0 +1,20 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>The layout state restoration when reframing the root element</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
+  <script>
+    SimpleTest.waitForExplicitFinish();
+    function test() {
+      window.open("file_bug1750973.html");
+    }
+  </script>
+</head>
+<body onload="setTimeout(test)">
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+<pre id="test"></pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_bug1758664.html b/docshell/test/navigation/test_bug1758664.html
new file mode 100644
index 0000000000..662242e44a
--- /dev/null
+++ b/docshell/test/navigation/test_bug1758664.html
@@ -0,0 +1,21 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Bug 1758664</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
+  <script>
+    SimpleTest.waitForExplicitFinish();
+
+    function test() {
+      window.open("file_bug1758664.html");
+    }
+  </script>
+</head>
+<body onload="test()">
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+<pre id="test"></pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_bug270414.html b/docshell/test/navigation/test_bug270414.html
new file mode 100644
index 0000000000..0635e32888
--- /dev/null
+++ b/docshell/test/navigation/test_bug270414.html
@@ -0,0 +1,103 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <script src="/tests/SimpleTest/SimpleTest.js"></script>
+    <script src="/tests/SimpleTest/EventUtils.js"></script>
+    <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+    <script type="text/javascript" src="NavigationUtils.js"></script>
+    <style type="text/css">
+      iframe { width: 90%; height: 50px; }
+    </style>
+<script>
+/* eslint-disable no-useless-concat */
+/* global window0:true, window1:true, window2:true, window3:true */
+var headerHTML = "<html><head>" +
+                 "<script src='/tests/SimpleTest/EventUtils.js'><\/script>" +
+                 "<script src='NavigationUtils.js'><\/script>" +
+                 "</head><body>";
+var footerHTML = "</body></html>";
+
+function testChild0() {
+  if (!window.window0) {
+    window0 = window.open("", "window0", "width=10,height=10");
+    window0.document.open();
+    // eslint-disable-next-line no-unsanitized/method
+    window0.document.write(headerHTML);
+    window0.document.write("<script>navigateByLocation(opener.frames[0])<\/script>");
+    // eslint-disable-next-line no-unsanitized/method
+    window0.document.write(footerHTML);
+    window0.document.close();
+  }
+}
+
+function testChild1() {
+  if (!window.window1) {
+    window1 = window.open("", "window1", "width=10,height=10");
+    window1.document.open();
+    // eslint-disable-next-line no-unsanitized/method
+    window1.document.write(headerHTML);
+    window1.document.write("<script>navigateByOpen('child1');<\/script>");
+    // eslint-disable-next-line no-unsanitized/method
+    window1.document.write(footerHTML);
+    window1.document.close();
+  }
+}
+
+function testChild2() {
+  if (!window.window2) {
+    window2 = window.open("", "window2", "width=10,height=10");
+    window2.document.open();
+    // eslint-disable-next-line no-unsanitized/method
+    window2.document.write(headerHTML);
+    window2.document.write("<script>navigateByForm('child2');<\/script>");
+    // eslint-disable-next-line no-unsanitized/method
+    window2.document.write(footerHTML);
+    window2.document.close();
+  }
+}
+
+function testChild3() {
+  if (!window.window3) {
+    window3 = window.open("", "window3", "width=10,height=10");
+    window3.document.open();
+    // eslint-disable-next-line no-unsanitized/method
+    window3.document.write(headerHTML);
+    window3.document.write("<script>navigateByHyperlink('child3');<\/script>");
+    // eslint-disable-next-line no-unsanitized/method
+    window3.document.write(footerHTML);
+    window3.document.close();
+  }
+}
+
+add_task(async function() {
+  await waitForFinishedFrames(4);
+
+  await isNavigated(frames[0], "Should be able to navigate on-domain opener's children by setting location.");
+  await isNavigated(frames[1], "Should be able to navigate on-domain opener's children by calling window.open.");
+  await isNavigated(frames[2], "Should be able to navigate on-domain opener's children by submitting form.");
+  await isNavigated(frames[3], "Should be able to navigate on-domain opener's children by targeted hyperlink.");
+
+  window0.close();
+  window1.close();
+  window2.close();
+  window3.close();
+
+  await cleanupWindows();
+});
+
+</script>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=270414">Mozilla Bug 270414</a>
+<div id="frames">
+<iframe onload="testChild0();" name="child0" src="http://test1.example.org:80/tests/docshell/test/navigation/blank.html"></iframe>
+<iframe onload="testChild1();" name="child1" src="http://test1.example.org:80/tests/docshell/test/navigation/blank.html"></iframe>
+<iframe onload="testChild2();" name="child2" src="http://test1.example.org:80/tests/docshell/test/navigation/blank.html"></iframe>
+<iframe onload="testChild3();" name="child3" src="http://test1.example.org:80/tests/docshell/test/navigation/blank.html"></iframe>
+</div>
+<pre id="test">
+<script type="text/javascript">
+</script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_bug278916.html b/docshell/test/navigation/test_bug278916.html
new file mode 100644
index 0000000000..9e2335721e
--- /dev/null
+++ b/docshell/test/navigation/test_bug278916.html
@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <script src="/tests/SimpleTest/SimpleTest.js"></script>
+    <script src="/tests/SimpleTest/EventUtils.js"></script>
+    <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+    <script type="text/javascript" src="NavigationUtils.js"></script>
+<script>
+window.onload = async function() {
+  document.getElementById("link0").href = target_url;
+  sendMouseEvent({type: "click"}, "link0");
+
+  await waitForFinishedFrames(1);
+
+  var array_of_frames = await getFramesByName("window0");
+  is(array_of_frames.length, 1, "Should only open one window using a fancy hyperlink.");
+
+  for (var i = 0; i < array_of_frames.length; ++i)
+    array_of_frames[i].close();
+
+  await cleanupWindows();
+  SimpleTest.finish();
+};
+</script>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=278916">Mozilla Bug 278916</a>
+<div id="links">
+<a id="link0" target="window0" onclick="window.open('', 'window0', 'width=10,height=10');">This is a fancy hyperlink</a>
+</div>
+<pre id="test">
+<script type="text/javascript">
+SimpleTest.waitForExplicitFinish();
+</script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_bug279495.html b/docshell/test/navigation/test_bug279495.html
new file mode 100644
index 0000000000..245ed14ed4
--- /dev/null
+++ b/docshell/test/navigation/test_bug279495.html
@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <script src="/tests/SimpleTest/SimpleTest.js"></script>
+    <script src="/tests/SimpleTest/EventUtils.js"></script>
+    <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+    <script type="text/javascript" src="NavigationUtils.js"></script>
+<script>
+window.onload = async function() {
+  document.getElementById("link0").href = target_url;
+  document.getElementById("link1").href = target_url;
+
+  sendMouseEvent({type: "click"}, "link0");
+  sendMouseEvent({type: "click"}, "link1");
+
+  await waitForFinishedFrames(2);
+  await countAndClose("window0", 1);
+  await countAndClose("window1", 1);
+
+  await cleanupWindows();
+  SimpleTest.finish();
+};
+
+async function countAndClose(name, expected_count) {
+  var array_of_frames = await getFramesByName(name);
+  is(array_of_frames.length, expected_count,
+     "Should only open " + expected_count +
+     " window(s) with name " + name + " using a fancy hyperlink.");
+}
+</script>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=279495">Mozilla Bug 279495</a>
+<div id="links">
+<a id="link0" target="window0" onclick="window.open('blank.html', 'window0', 'width=10,height=10');">This is a fancy hyperlink</a>
+<a id="link1" target="window1" onclick="window.open('https://test1.example.org/tests/docshell/test/navigation/blank.html', 'window1', 'width=10,height=10');">This is a fancy hyperlink</a>
+</div>
+<pre id="test">
+<script type="text/javascript">
+SimpleTest.waitForExplicitFinish();
+</script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_bug344861.html b/docshell/test/navigation/test_bug344861.html
new file mode 100644
index 0000000000..5ab8809d27
--- /dev/null
+++ b/docshell/test/navigation/test_bug344861.html
@@ -0,0 +1,35 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=344861
+-->
+<head>
+  <title>Test for Bug 344861</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>        
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=344861">Mozilla Bug 344861</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+  
+</div>
+<pre id="test">
+<script class="testbody" type="text/javascript">
+
+/** Test for Bug 344861 */
+SimpleTest.waitForExplicitFinish();
+
+var newwindow = window.open("/", "testwindow", "width=200,height=200");
+newwindow.onload = function() {
+  is(newwindow.innerHeight, 200, "window.open has correct height dimensions");
+  is(newwindow.innerWidth, 200, "window.open has correct width dimensions");
+  SimpleTest.finish();
+  newwindow.close();
+};
+</script>
+</pre>
+</body>
+</html>
+
+   
diff --git a/docshell/test/navigation/test_bug386782.html b/docshell/test/navigation/test_bug386782.html
new file mode 100644
index 0000000000..f6ad85f5a6
--- /dev/null
+++ b/docshell/test/navigation/test_bug386782.html
@@ -0,0 +1,122 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=386782
+-->
+<head>
+  <title>Test for Bug 386782</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="/tests/SimpleTest/EventUtils.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+
+  <script>
+
+    // This tests if we can load a document whose root is in designMode,
+    // edit it, navigate to a new page, navigate back, still edit, and still
+    // undo/redo. Note that this is different from the case where the
+    // designMode document is in a frame inside the window, as this means
+    // the editable region is not in the root docshell (a less complicated case).
+
+    var gTests = [
+      {
+        // <html><body><p>designModeDocument</p></body></html>
+        url: "file_bug386782_designmode.html",
+        name: "designModeNavigate",
+        onload(doc) { doc.designMode = "on"; },
+        expectedBodyBeforeEdit: "<p>designModeDocument</p>",
+        expectedBodyAfterEdit:  "<p>EDITED designModeDocument</p>",
+        expectedBodyAfterSecondEdit: "<p>EDITED TWICE designModeDocument</p>",
+      },
+      {
+        // <html><body contentEditable="true"><p>contentEditable</p></body></html>
+        url: "file_bug386782_contenteditable.html",
+        name: "contentEditableNavigate",
+        expectedBodyBeforeEdit: "<p>contentEditable</p>",
+        expectedBodyAfterEdit:  "EDITED <br><p>contentEditable</p>",
+        expectedBodyAfterSecondEdit: "EDITED TWICE <br><p>contentEditable</p>",
+      },
+    ];
+
+    var gTest = null;
+
+    add_task(async () => {
+      while (gTests.length) {
+        gTest = gTests.shift();
+        await runTest();
+      }
+    });
+
+    async function runTest() {
+      gTest.window = window.open(gTest.url, gTest.name, "width=500,height=500");
+      let e = await new Promise(r => window.onmessage = r);
+      is(e.data.persisted, false, "Initial load cannot be persisted");
+      if ("onload" in gTest) {
+        gTest.onload(gTest.window.document);
+      }
+      await SimpleTest.promiseFocus(gTest.window);
+
+      gTest.window.document.body.focus();
+
+      // WARNING: If the following test fails, give the setTimeout() in the onload()
+      // a bit longer; the doc hasn't had enough time to setup its editor.
+      is(gTest.window.document.body.innerHTML, gTest.expectedBodyBeforeEdit, "Is doc setup yet");
+      sendString("EDITED ", gTest.window);
+      is(gTest.window.document.body.innerHTML, gTest.expectedBodyAfterEdit, "Editing failed.");
+
+      gTest.window.location = "about:blank";
+      await new Promise(r => gTest.window.onpagehide = r);
+      // The active document is updated synchronously after "pagehide" (and
+      // its associated microtasks), so, after waiting for the next global
+      // task, gTest.window will be proxying the realm associated with the
+      // "about:blank" document.
+      // https://html.spec.whatwg.org/multipage/browsing-the-web.html#update-the-session-history-with-the-new-page
+      await new Promise(r => setTimeout(r));
+      is(gTest.window.location.href, "about:blank", "location.href");
+      await SimpleTest.promiseFocus(gTest.window, true);
+
+      gTest.window.history.back();
+      e = await new Promise(r => window.onmessage = r);
+      // Skip the test if the page is not loaded from the bf-cache when going back.
+      if (e.data.persisted) {
+        checkStillEditable();
+      }
+      gTest.window.close();
+    }
+
+    function checkStillEditable() {
+      // Check that the contents are correct.
+      is(gTest.window.document.body.innerHTML, gTest.expectedBodyAfterEdit, "Edited contents still correct?");
+
+      // Check that we can undo/redo and the contents are correct.
+      gTest.window.document.execCommand("undo", false, null);
+      is(gTest.window.document.body.innerHTML, gTest.expectedBodyBeforeEdit, "Can we undo?");
+
+      gTest.window.document.execCommand("redo", false, null);
+      is(gTest.window.document.body.innerHTML, gTest.expectedBodyAfterEdit, "Can we redo?");
+
+      // Check that we can still edit the page.
+      gTest.window.document.body.focus();
+      sendString("TWICE ", gTest.window);
+      is(gTest.window.document.body.innerHTML, gTest.expectedBodyAfterSecondEdit, "Can we still edit?");
+    }
+
+  </script>
+
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=386782">Mozilla Bug 386782</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+
+</div>
+<pre id="test">
+<script class="testbody" type="text/javascript">
+
+/** Test for Bug 386782 */
+
+SimpleTest.waitForExplicitFinish();
+
+</script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_bug430624.html b/docshell/test/navigation/test_bug430624.html
new file mode 100644
index 0000000000..49afb023b9
--- /dev/null
+++ b/docshell/test/navigation/test_bug430624.html
@@ -0,0 +1,57 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=430624
+-->
+<head>
+  <title>Test for Bug 430624</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+  <script src="/tests/SimpleTest/EventUtils.js"></script>  
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=430624">Mozilla Bug 430624</a>
+<p id="display"></p>
+
+
+
+<div id="content" style="display: none">
+  
+</div>
+<pre id="test">
+<script class="testbody" type="text/javascript">
+
+/** Test for Bug 430624 */
+
+function onLoad() {
+  window.frames[0].frameElement.onload = onReload;
+  // eslint-disable-next-line no-self-assign
+  window.frames[0].frameElement.srcdoc = window.frames[0].frameElement.srcdoc;
+}
+
+function onReload() {
+  var iframe = window.frames[0].frameElement;
+  SimpleTest.waitForFocus(doTest, iframe.contentWindow);
+  iframe.contentDocument.body.focus();
+}
+
+function doTest() {
+  var bodyElement = window.frames[0].frameElement.contentDocument.body;
+  bodyElement.focus();
+  sendString("Still ", window.frames[0].frameElement.contentWindow);
+
+  is(bodyElement.innerHTML, "Still contentEditable", "Check we're contentEditable after reload");
+
+  SimpleTest.finish();
+}
+
+SimpleTest.waitForExplicitFinish();
+
+</script>
+</pre>
+
+<iframe onload="onLoad()" srcdoc="<body contenteditable>contentEditable</body>"></iframe>
+
+</body>
+</html>
+
diff --git a/docshell/test/navigation/test_bug430723.html b/docshell/test/navigation/test_bug430723.html
new file mode 100644
index 0000000000..dd85c7fb08
--- /dev/null
+++ b/docshell/test/navigation/test_bug430723.html
@@ -0,0 +1,124 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=430723
+-->
+<head>
+  <title>Test for Bug 430723</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="/tests/SimpleTest/EventUtils.js"></script>  
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=430723">Mozilla Bug 430723</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+  
+</div>
+<pre id="test">
+<script class="testbody" type="text/javascript">
+// <![CDATA[
+
+/** Test for Bug 430723 */
+
+var BASE_URI = "http://mochi.test:8888/tests/docshell/test/navigation/";
+var gTallRedBoxURI = BASE_URI + "redbox_bug430723.html";
+var gTallBlueBoxURI = BASE_URI + "bluebox_bug430723.html";
+
+window.onload = runTest;
+
+var testWindow;
+var testNum = 0;
+
+var smoothScrollPref = "general.smoothScroll";
+function runTest() {
+  SpecialPowers.pushPrefEnv({"set": [[smoothScrollPref, false]]}, function() {
+    testWindow = window.open(gTallRedBoxURI, "testWindow", "width=300,height=300,location=yes,scrollbars=yes");
+  });
+}
+
+var nextTest = function() {
+  testNum++;
+  switch (testNum) {
+    case 1: setTimeout(step1, 0); break;
+    case 2: setTimeout(step2, 0); break;
+    case 3: setTimeout(step3, 0); break;
+  }
+};
+
+var step1 = function() {
+  window.is(String(testWindow.location), gTallRedBoxURI, "Ensure red page loaded.");
+
+  // Navigate down and up.
+  is(testWindow.document.body.scrollTop, 0,
+     "Page1: Ensure the scrollpane is at the top before we start scrolling.");
+  testWindow.addEventListener("scroll", function() {
+    isnot(testWindow.document.body.scrollTop, 0,
+          "Page1: Ensure we can scroll down.");
+    SimpleTest.executeSoon(step1_2);
+  }, {capture: true, once: true});
+  sendKey("DOWN", testWindow);
+
+  function step1_2() {
+    testWindow.addEventListener("scroll", function() {
+      is(testWindow.document.body.scrollTop, 0,
+         "Page1: Ensure we can scroll up, back to the top.");
+
+      // Nav to blue box page. This should fire step2.
+      testWindow.location = gTallBlueBoxURI;
+    }, {capture: true, once: true});
+    sendKey("UP", testWindow);
+  }
+};
+
+
+var step2 = function() {
+  window.is(String(testWindow.location), gTallBlueBoxURI, "Ensure blue page loaded.");
+
+  // Scroll around a bit.
+  is(testWindow.document.body.scrollTop, 0,
+     "Page2: Ensure the scrollpane is at the top before we start scrolling.");
+
+  var scrollTest = function() {
+    if (++count < 2) {
+      SimpleTest.executeSoon(function() { sendKey("DOWN", testWindow); });
+    } else {
+      testWindow.removeEventListener("scroll", scrollTest, true);
+
+      isnot(testWindow.document.body.scrollTop, 0,
+            "Page2: Ensure we could scroll.");
+
+      // Navigate backwards. This should fire step3.
+      testWindow.history.back();
+    }
+  };
+
+  var count = 0;
+  testWindow.addEventListener("scroll", scrollTest, true);
+  sendKey("DOWN", testWindow);
+};
+
+var step3 = function() {
+  window.is(String(testWindow.location), gTallRedBoxURI,
+            "Ensure red page restored from history.");
+
+  // Check we can still scroll with the keys.
+  is(testWindow.document.body.scrollTop, 0,
+     "Page1Again: Ensure scroll pane at top before we scroll.");
+  testWindow.addEventListener("scroll", function() {
+    isnot(testWindow.document.body.scrollTop, 0,
+          "Page2Again: Ensure we can still scroll.");
+
+    testWindow.close();
+    window.SimpleTest.finish();
+  }, {capture: true, once: true});
+  sendKey("DOWN", testWindow);
+};
+
+SimpleTest.waitForExplicitFinish();
+
+// ]]>
+</script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_child.html b/docshell/test/navigation/test_child.html
new file mode 100644
index 0000000000..87237471cd
--- /dev/null
+++ b/docshell/test/navigation/test_child.html
@@ -0,0 +1,47 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <script src="/tests/SimpleTest/SimpleTest.js"></script>
+    <script src="/tests/SimpleTest/EventUtils.js"></script>
+    <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+    <script type="text/javascript" src="NavigationUtils.js"></script>
+    <style type="text/css">
+      iframe { width: 90%; height: 50px; }
+    </style>
+<script>
+if (!navigator.platform.startsWith("Win")) {
+  SimpleTest.expectAssertions(0, 1);
+}
+
+window.onload = async function() {
+  navigateByLocation(frames[0]);
+  navigateByOpen("child1");
+  navigateByForm("child2");
+  navigateByHyperlink("child3");
+
+  await waitForFinishedFrames(4);
+  await isNavigated(frames[0], "Should be able to navigate off-domain child by setting location.");
+  await isNavigated(frames[1], "Should be able to navigate off-domain child by calling window.open.");
+  await isNavigated(frames[2], "Should be able to navigate off-domain child by submitting form.");
+  await isNavigated(frames[3], "Should be able to navigate off-domain child by targeted hyperlink.");
+
+  await cleanupWindows();
+  SimpleTest.finish();
+};
+</script>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=408052">Mozilla Bug 408052</a>
+<div id="frames">
+<iframe name="child0" src="http://test1.example.org:80/tests/docshell/test/navigation/blank.html"></iframe>
+<iframe name="child1" src="http://test1.example.org:80/tests/docshell/test/navigation/blank.html"></iframe>
+<iframe name="child2" src="http://test1.example.org:80/tests/docshell/test/navigation/blank.html"></iframe>
+<iframe name="child3" src="http://test1.example.org:80/tests/docshell/test/navigation/blank.html"></iframe>
+</div>
+<pre id="test">
+<script type="text/javascript">
+SimpleTest.waitForExplicitFinish();
+</script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_contentpolicy_block_window.html b/docshell/test/navigation/test_contentpolicy_block_window.html
new file mode 100644
index 0000000000..7ce337c131
--- /dev/null
+++ b/docshell/test/navigation/test_contentpolicy_block_window.html
@@ -0,0 +1,98 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=1329288
+-->
+<head>
+  <title>Test for Bug 1329288</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>        
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1329288">Mozilla Bug 1329288</a>
+
+
+<!-- have a testlink which we can use for the test to open a new window -->
+<a href="http://test1.example.org/tests/docshell/test/navigation/file_contentpolicy_block_window.html"
+   target="_blank"
+   id="testlink">This is a link</a>
+
+<script class="testbody" type="text/javascript">
+/*
+ * Description of the test:
+ * The test tries to open a new window and makes sure that a registered contentPolicy
+ * gets called with the right (a non null) 'context' for the TYPE_DOCUMENT load.
+ */
+
+const Ci = SpecialPowers.Ci;
+
+var categoryManager = SpecialPowers.Services.catMan;
+var componentManager = SpecialPowers.Components.manager
+                       .QueryInterface(Ci.nsIComponentRegistrar);
+
+// Content policy / factory implementation for the test
+var policyID = SpecialPowers.wrap(SpecialPowers.Components).ID("{b80e19d0-878f-d41b-2654-194714a4115c}");
+var policyName = "@mozilla.org/testpolicy;1";
+var policy = {
+  // nsISupports implementation
+  // eslint-disable-next-line mozilla/use-chromeutils-generateqi
+  QueryInterface(iid) {
+    iid = SpecialPowers.wrap(iid);
+    if (iid.equals(Ci.nsISupports) ||
+        iid.equals(Ci.nsIFactory) ||
+        iid.equals(Ci.nsIContentPolicy))
+      return this;
+    throw SpecialPowers.Cr.NS_ERROR_NO_INTERFACE;
+  },
+
+  // nsIFactory implementation
+  createInstance(iid) {
+    return this.QueryInterface(iid);
+  },
+
+  // nsIContentPolicy implementation
+  shouldLoad(contentLocation, loadInfo, mimeTypeGuess) {
+    let contentType = loadInfo.externalContentPolicyType;
+    let context = loadInfo.loadingContext;
+
+    if (SpecialPowers.wrap(contentLocation).spec !== document.getElementById("testlink").href) {
+      // not the URI we are looking for, allow the load
+      return Ci.nsIContentPolicy.ACCEPT;
+    }
+
+    is(contentType, Ci.nsIContentPolicy.TYPE_DOCUMENT,
+       "needs to be type document load");
+    ok(context, "context is not allowed to be null");
+    ok(context.name.endsWith("test_contentpolicy_block_window.html"),
+       "context should be the current window");
+
+    // remove the policy and finish test.
+    categoryManager.deleteCategoryEntry("content-policy", policyName, false);
+
+    setTimeout(function() {
+      // Component must be unregistered delayed, otherwise other content
+      // policy will not be removed from the category correctly
+      componentManager.unregisterFactory(policyID, policy);
+    }, 0);
+
+    SimpleTest.finish();
+    return Ci.nsIContentPolicy.REJECT_REQUEST;
+  },
+
+  shouldProcess(contentLocation, loadInfo, mimeTypeGuess) {
+    return Ci.nsIContentPolicy.ACCEPT;
+  },
+};
+
+policy = SpecialPowers.wrapCallbackObject(policy);
+componentManager.registerFactory(policyID, "Test content policy", policyName, policy);
+categoryManager.addCategoryEntry("content-policy", policyName, policyName, false, true);
+
+SimpleTest.waitForExplicitFinish();
+
+// now everything is set up, let's start the test
+document.getElementById("testlink").click();
+
+</script>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_docshell_gotoindex.html b/docshell/test/navigation/test_docshell_gotoindex.html
new file mode 100644
index 0000000000..992c9c9dbe
--- /dev/null
+++ b/docshell/test/navigation/test_docshell_gotoindex.html
@@ -0,0 +1,29 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Bug 1684310</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
+  <script>
+    SimpleTest.waitForExplicitFinish();
+    function test() {
+      /*
+       * This test is for nsIWebNavigation.gotoIndex.
+       *
+       * The test
+       * - opens a new window
+       * - loads a page there
+       * - loads another page
+       * - navigates to some fragments in the page
+       * - goes back to one of the fragments
+       * - tries to go back to the initial page.
+      */
+      window.open("file_docshell_gotoindex.html");
+    }
+  </script>
+</head>
+<body onload="test()">
+<p id="display"></p>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_dynamic_frame_forward_back.html b/docshell/test/navigation/test_dynamic_frame_forward_back.html
new file mode 100644
index 0000000000..f3a349e09a
--- /dev/null
+++ b/docshell/test/navigation/test_dynamic_frame_forward_back.html
@@ -0,0 +1,35 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=
+-->
+<head>
+  <title>Test for Bug 508537</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body onload="runTest()">
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=508537">Mozilla Bug 508537</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+
+</div>
+<pre id="test">
+  <script type="application/javascript">
+    SimpleTest.waitForExplicitFinish();
+
+    var testWindow;
+    function runTest() {
+        testWindow = window.open("file_bug508537_1.html", "", "width=360,height=480");
+        testWindow.onunload = function() { }; // to prevent bfcache
+    }
+
+    function finishTest() {
+      testWindow.close();
+      SimpleTest.finish();
+    }
+
+  </script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_evict_from_bfcache.html b/docshell/test/navigation/test_evict_from_bfcache.html
new file mode 100644
index 0000000000..0b1eb2fca4
--- /dev/null
+++ b/docshell/test/navigation/test_evict_from_bfcache.html
@@ -0,0 +1,63 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Evict a page from bfcache</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
+  <script>
+  /*
+   * This test checks that a page can be evicted from bfcache. Sending a
+   * message to an open BroadcastChannel is used for this.
+   *
+   * First the test opens a window and loads a page there. Another page is then
+   * loaded and then session history is navigated back to check if bfcache is
+   * enabled. If not, close message is sent to close the opened window and this
+   * controller page will finish the test.
+   * If bfcache is enabled, session history goes forward, but the
+   * BroadcastChannel in the page isn't closed. Then sending the message to go
+   * back again should evict the bfcached page.
+   * Close message is sent and window closed and test finishes.
+   */
+
+  SimpleTest.waitForExplicitFinish();
+  var bc = new BroadcastChannel("evict_from_bfcache");
+  var pageshowCount = 0;
+  bc.onmessage = function(event) {
+    if (event.data.type == "pageshow") {
+      ++pageshowCount;
+      info("pageshow " + pageshowCount);
+      if (pageshowCount == 1) {
+        bc.postMessage("nextpage");
+      } else if (pageshowCount == 2) {
+        bc.postMessage("back");
+      } else if (pageshowCount == 3) {
+        if (!event.data.persisted) {
+          ok(true, "BFCache isn't enabled.");
+          bc.postMessage("close");
+        } else {
+          bc.postMessage("forward");
+        }
+      } else if (pageshowCount == 4) {
+        bc.postMessage("back");
+      } else if (pageshowCount == 5) {
+        ok(!event.data.persisted,
+           "The page should have been evicted from BFCache");
+        bc.postMessage("close");
+      }
+    } else if (event.data == "closed") {
+      SimpleTest.finish();
+    }
+  }
+
+  function runTest() {
+    window.open("file_evict_from_bfcache.html", "", "noopener");
+  }
+  </script>
+</head>
+<body onload="runTest()">
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+<pre id="test"></pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_fragment_handling_during_load.html b/docshell/test/navigation/test_fragment_handling_during_load.html
new file mode 100644
index 0000000000..9c082c2ecf
--- /dev/null
+++ b/docshell/test/navigation/test_fragment_handling_during_load.html
@@ -0,0 +1,35 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=
+-->
+<head>
+  <title>Test for fragment navigation during load</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body onload="runTest()">
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=978408">Mozilla Bug 978408</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+
+</div>
+<pre id="test">
+  <script type="application/javascript">
+    SimpleTest.waitForExplicitFinish();
+
+    var testWindow;
+    function runTest() {
+      testWindow = window.open("file_fragment_handling_during_load.html", "", "width=360,height=480");
+      testWindow.onunload = function() { }; // to prevent bfcache
+    }
+
+    function finishTest() {
+      testWindow.close();
+      SimpleTest.finish();
+    }
+
+  </script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_grandchild.html b/docshell/test/navigation/test_grandchild.html
new file mode 100644
index 0000000000..10cf610664
--- /dev/null
+++ b/docshell/test/navigation/test_grandchild.html
@@ -0,0 +1,47 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <script src="/tests/SimpleTest/SimpleTest.js"></script>
+    <script src="/tests/SimpleTest/EventUtils.js"></script>
+    <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+    <script type="text/javascript" src="NavigationUtils.js"></script>
+    <style type="text/css">
+      iframe { width: 90%; height: 200px; }
+    </style>
+<script>
+if (!navigator.platform.startsWith("Win")) {
+  SimpleTest.expectAssertions(0, 1);
+}
+
+window.onload = async function() {
+  navigateByLocation(frames[0].frames[0]);
+  navigateByOpen("child1_child0");
+  navigateByForm("child2_child0");
+  navigateByHyperlink("child3_child0");
+
+  await waitForFinishedFrames(4);
+  await isNavigated(frames[0].frames[0], "Should be able to navigate off-domain grandchild by setting location.");
+  await isNavigated(frames[1].frames[0], "Should be able to navigate off-domain grandchild by calling window.open.");
+  await isNavigated(frames[2].frames[0], "Should be able to navigate off-domain grandchild by submitting form.");
+  await isNavigated(frames[3].frames[0], "Should be able to navigate off-domain grandchild by targeted hyperlink.");
+
+  await cleanupWindows();
+  SimpleTest.finish();
+};
+</script>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=408052">Mozilla Bug 408052</a>
+<div id="frames">
+<iframe name="child0" src="http://test1.example.org:80/tests/docshell/test/navigation/parent.html"></iframe>
+<iframe name="child1" src="http://test1.example.org:80/tests/docshell/test/navigation/parent.html"></iframe>
+<iframe name="child2" src="http://test1.example.org:80/tests/docshell/test/navigation/parent.html"></iframe>
+<iframe name="child3" src="http://test1.example.org:80/tests/docshell/test/navigation/parent.html"></iframe>
+</div>
+<pre id="test">
+<script type="text/javascript">
+SimpleTest.waitForExplicitFinish();
+</script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_load_history_entry.html b/docshell/test/navigation/test_load_history_entry.html
new file mode 100644
index 0000000000..8ca3fcb913
--- /dev/null
+++ b/docshell/test/navigation/test_load_history_entry.html
@@ -0,0 +1,196 @@
+
+<!DOCTYPE HTML>
+<html>
+<head>
+    <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+    <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+    <script type="application/javascript" src="/tests/SimpleTest/SpecialPowers.js"></script>
+    <script type="application/javascript">
+    /*
+     * Perform the following steps.
+     * 1) Go to file_load_history_entry_page_with_two_links.html, which contains two links, 'link1' and 'link2'
+     * 2) Click on 'link1' to be taken to file_load_history_entry_page_with_two_links.html#1
+     * 3) Click on 'link2' to be taken to file_load_history_entry_page_with_two_links.html#2
+     * 4) Go to file_load_history_entry_page_with_one_link.html
+     * 5) Push state to go to file_load_history_entry_page_with_one_link.html#1
+     *
+     * After each step
+     * - Check the number of session history entries
+     * - Reload the document and do the above again
+     * - Navigate back and check the correct history index
+     * - Navigate forward and check the correct history index and location
+     */
+    async function test() {
+        let testWin;
+        var promise;
+        var previousLocation;
+        var numSHEntries = 0;
+
+        // Step 1. Open a new tab and load a document with two links inside
+        // Now we are at file_load_history_entry_page_with_two_links.html
+        numSHEntries++;
+        promise = waitForLoad();
+        testWin = window.open("file_load_history_entry_page_with_two_links.html");
+        await promise;
+
+        let shistory = SpecialPowers.wrap(testWin)
+                       .docShell
+                       .QueryInterface(SpecialPowers.Ci.nsIWebNavigation)
+                       .sessionHistory;
+
+        // Step 2. Navigate the document by clicking on the 1st link
+        // Now we are at file_load_history_entry_page_with_two_links.html#1
+        numSHEntries++;
+        previousLocation = testWin.location.href;
+        await clickLink(testWin, "link1");
+        await doAfterEachTest(testWin, shistory, numSHEntries, previousLocation);
+
+        // Step 3. Navigate the document by clicking the 2nd link
+        // Now we are file_load_history_entry_page_with_two_links.html#2
+        numSHEntries++;
+        previousLocation = testWin.location.href;
+        await clickLink(testWin, "link2");
+        await doAfterEachTest(testWin, shistory, numSHEntries, previousLocation);
+
+        // Step 4. Navigate the document to a different page
+        // Now we are at file_load_history_entry_page_with_one_link.html
+        numSHEntries++;
+        previousLocation = testWin.location.href;
+        promise = waitForLoad();
+        testWin.location = "file_load_history_entry_page_with_one_link.html";
+        await promise;
+        await doAfterEachTest(testWin, shistory, numSHEntries, previousLocation,
+                true /* isCrossDocumentLoad */, false /* hashChangeExpected */);
+
+        // Step 5. Push some state
+        // Now we are at file_load_history_entry_page_with_one_link.html#1
+        numSHEntries++;
+        previousLocation = testWin.location.href;
+        testWin.history.pushState({foo: "bar"}, "", "#1");
+        is(testWin.history.length, numSHEntries, "Session history's length is correct after pushing state");
+        is(shistory.index, numSHEntries - 1 /* we haven't switched to new history entry yet*/,
+                            "Session history's index is correct after pushing state");
+        await doAfterEachTest(testWin, shistory, numSHEntries, previousLocation);
+
+        // We are done with the test
+        testWin.close();
+        SimpleTest.finish();
+    }
+
+    /*
+     * @prevLocation
+     *       if undefined, it is because there is no page to go back to
+     *
+     * @isCrossDocumentLoad
+     *       did we just open a different document
+     * @hashChangeExpected
+     *       Would we get a hash change event if we navigated backwards and forwards in history?
+     *       This is framed with respect to the previous step, e.g. in the previous step was the
+     *       hash different from the location we have navigated to just before calling this function?
+     *       When we navigate forwards or backwards, we need to wait for this event
+     *       because clickLink() also waits for hashchange event and
+     *       if this function gets called before clickLink(), sometimes hashchange
+     *       events from this function will leak to clickLink.
+     */
+    async function doAfterEachTest(testWin, shistory, expectedNumSHEntries, prevLocation,
+                                   isCrossDocumentLoad = false, hashChangeExpected = true) {
+        var initialLocation = testWin.location.href;
+        var initialSHIndex = shistory.index;
+        var promise;
+        is(testWin.history.length, expectedNumSHEntries, "Session history's length is correct");
+
+        // Reload the document
+        promise = waitForLoad();
+        testWin.location.reload(true);
+        await promise;
+        is(testWin.history.length, expectedNumSHEntries, "Session history's length is correct after reloading");
+
+        if (prevLocation == undefined) {
+            return;
+        }
+
+        var hashChangePromise;
+        if (hashChangeExpected) {
+            hashChangePromise = new Promise(resolve => {
+                testWin.addEventListener("hashchange", resolve, {once: true});
+            });
+        }
+        // Navigate backwards
+        if (isCrossDocumentLoad) {
+            // Current page must have been a cross document load, so we just need to wait for
+            // document load to complete after we navigate the history back
+            // because popstate event will not be fired in this case
+            promise = waitForLoad();
+        } else {
+            promise = waitForPopstate(testWin);
+        }
+        testWin.history.back();
+        await promise;
+        if (hashChangeExpected) {
+            await hashChangePromise;
+        }
+        is(testWin.location.href, prevLocation, "Window location is correct after navigating back in history");
+        is(shistory.index, initialSHIndex - 1, "Session history's index is correct after navigating back in history");
+
+        // Navigate forwards
+        if (isCrossDocumentLoad) {
+            promise = waitForLoad();
+        } else {
+            promise = waitForPopstate(testWin);
+        }
+        if (hashChangeExpected) {
+            hashChangePromise = new Promise(resolve => {
+                testWin.addEventListener("hashchange", resolve, {once: true});
+            });
+        }
+        testWin.history.forward();
+        await promise;
+        if (hashChangeExpected) {
+            await hashChangePromise;
+        }
+        is(testWin.location.href, initialLocation, "Window location is correct after navigating forward in history");
+        is(shistory.index, initialSHIndex, "Session history's index is correct after navigating forward in history");
+    }
+
+    async function waitForLoad() {
+        return new Promise(resolve => {
+            window.bodyOnLoad = function() {
+                setTimeout(resolve, 0);
+                window.bodyOnLoad = undefined;
+            };
+        });
+    }
+
+    async function waitForPopstate(win) {
+        return new Promise(resolve => {
+            win.addEventListener("popstate", (e) => {
+                setTimeout(resolve, 0);
+            }, {once: true});
+        });
+    }
+
+    async function clickLink(win, id) {
+        var link = win.document.getElementById(id);
+        let clickPromise = new Promise(resolve => {
+            win.addEventListener("hashchange", resolve, {once: true});
+        });
+        link.click();
+        await clickPromise;
+    }
+
+    </script>
+</head>
+
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1539482">Bug 1539482</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+</div>
+<pre id="test">
+<script type="text/javascript">
+SimpleTest.waitForExplicitFinish();
+</script>
+</pre>
+<body onload="test()">
+</body>
+</html>
+
diff --git a/docshell/test/navigation/test_meta_refresh.html b/docshell/test/navigation/test_meta_refresh.html
new file mode 100644
index 0000000000..bda9a9fe73
--- /dev/null
+++ b/docshell/test/navigation/test_meta_refresh.html
@@ -0,0 +1,42 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Test meta refresh</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
+  <script>
+    SimpleTest.waitForExplicitFinish();
+
+    let hasLoadedInitialOnce = false;
+    let bc = new BroadcastChannel("test_meta_refresh");
+    bc.onmessage = function(event) {
+      info(event.data.load || event.data);
+      if (event.data.load == "initial") {
+        if (!hasLoadedInitialOnce) {
+          hasLoadedInitialOnce = true;
+          bc.postMessage("loadnext");
+        } else {
+          bc.postMessage("ensuremetarefresh");
+        }
+      } else if (event.data.load == "nextpage") {
+        bc.postMessage("back");
+      } else if (event.data.load == "refresh") {
+        bc.postMessage("close");
+      } else if (event.data == "closed") {
+        ok(true, "Meta refresh page was loaded.");
+        SimpleTest.finish();
+      }
+    }
+
+    function test() {
+      window.open("file_meta_refresh.html?initial", "", "noopener");
+    }
+  </script>
+</head>
+<body onload="test()">
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+<pre id="test"></pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_navigation_type.html b/docshell/test/navigation/test_navigation_type.html
new file mode 100644
index 0000000000..75ea88bcbd
--- /dev/null
+++ b/docshell/test/navigation/test_navigation_type.html
@@ -0,0 +1,47 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>performance.navigation.type</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
+  <script>
+    SimpleTest.waitForExplicitFinish();
+    let bc = new BroadcastChannel("navigation_type");
+    let pageshowCount = 0;
+    bc.onmessage = function(event) {
+      if (event.data == "closed") {
+        bc.close();
+        SimpleTest.finish();
+        return;
+      }
+
+      ++pageshowCount;
+      if (pageshowCount == 1) {
+        is(event.data.navigationType, PerformanceNavigation.TYPE_NAVIGATE,
+           "Should have navigation type TYPE_NAVIGATE.");
+        bc.postMessage("loadNewPage");
+      } else if (pageshowCount == 2) {
+        is(event.data.navigationType, PerformanceNavigation.TYPE_NAVIGATE,
+           "Should have navigation type TYPE_NAVIGATE.");
+        bc.postMessage("back");
+      } else if (pageshowCount == 3) {
+        is(event.data.navigationType, PerformanceNavigation.TYPE_BACK_FORWARD ,
+           "Should have navigation type TYPE_BACK_FORWARD .");
+        bc.postMessage("close");
+      } else {
+        ok(false, "Unexpected load");
+      }
+    }
+
+    function test() {
+      window.open("file_navigation_type.html", "", "noopener");
+    }
+  </script>
+</head>
+<body onload="test()">
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+<pre id="test"></pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_nested_frames.html b/docshell/test/navigation/test_nested_frames.html
new file mode 100644
index 0000000000..c3b49e0e23
--- /dev/null
+++ b/docshell/test/navigation/test_nested_frames.html
@@ -0,0 +1,35 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=
+-->
+<head>
+  <title>Test for Bug 1090918</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body onload="runTest()">
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1090918">Mozilla Bug 1090918</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+
+</div>
+<pre id="test">
+  <script type="application/javascript">
+    SimpleTest.waitForExplicitFinish();
+
+    var testWindow;
+    function runTest() {
+        testWindow = window.open("file_nested_frames.html", "", "width=360,height=480");
+        testWindow.onunload = function() { }; // to prevent bfcache
+    }
+
+    function finishTest() {
+      testWindow.close()
+      SimpleTest.finish();
+    }
+
+  </script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_new_shentry_during_history_navigation.html b/docshell/test/navigation/test_new_shentry_during_history_navigation.html
new file mode 100644
index 0000000000..0c9adc5280
--- /dev/null
+++ b/docshell/test/navigation/test_new_shentry_during_history_navigation.html
@@ -0,0 +1,90 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Test adding new session history entries while navigating to another one</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
+  <script>
+    SimpleTest.waitForExplicitFinish();
+
+    var win;
+
+    function waitForMessage(msg) {
+      return new Promise(
+        function(resolve) {
+          window.addEventListener("message",
+            function(event) {
+              is(event.data, msg, "Got the expected message " + msg);
+              resolve();
+            }, { once: true }
+          );
+        }
+      );
+    }
+
+    async function test() {
+
+      let loadPromise = waitForMessage("load");
+      win = window.open("file_new_shentry_during_history_navigation_1.html");
+      await loadPromise;
+
+      loadPromise = waitForMessage("load");
+      win.location.href = "file_new_shentry_during_history_navigation_2.html";
+      await loadPromise;
+
+      let beforeunloadPromise = waitForMessage("beforeunload");
+      win.history.back();
+      await beforeunloadPromise;
+      await waitForMessage("load");
+
+      win.history.back();
+      SimpleTest.requestFlakyTimeout("Test that history.back() does not work on the initial entry.");
+      setTimeout(function() {
+          win.onmessage = null;
+          win.close();
+          testBfcache();
+      }, 500);
+      window.onmessage = function(event) {
+        ok(false, "Should not get a message " + event.data);
+      }
+    }
+
+    async function testBfcache() {
+      let bc = new BroadcastChannel("new_shentry_during_history_navigation");
+      let pageshowCount = 0;
+      bc.onmessage = function(event) {
+        if (event.data.type == "pageshow") {
+          ++pageshowCount;
+          info("pageshow: " + pageshowCount + ", page: " + event.data.page);
+          if (pageshowCount == 1) {
+            ok(!event.data.persisted, "The page should not be bfcached.");
+            bc.postMessage("loadnext");
+          } else if (pageshowCount == 2) {
+            ok(!event.data.persisted, "The page should not be bfcached.");
+            bc.postMessage("loadnext");
+          } else if (pageshowCount == 3) {
+            ok(!event.data.persisted, "The page should not be bfcached.");
+            bc.postMessage("back");
+          } else if (pageshowCount == 4) {
+            ok(event.data.persisted, "The page should be bfcached.");
+            bc.postMessage("forward");
+          } else if (pageshowCount == 5) {
+            ok(event.data.page.includes("v2"), "Should have gone forward.");
+            bc.postMessage("close");
+            SimpleTest.finish();
+          }
+        }
+      };
+      win = window.open("file_new_shentry_during_history_navigation_3.html", "", "noopener");
+
+    }
+
+  </script>
+</head>
+<body onload="test()">
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+<pre id="test"></pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_not-opener.html b/docshell/test/navigation/test_not-opener.html
new file mode 100644
index 0000000000..acdb9473e6
--- /dev/null
+++ b/docshell/test/navigation/test_not-opener.html
@@ -0,0 +1,56 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <script src="/tests/SimpleTest/SimpleTest.js"></script>
+    <script src="/tests/SimpleTest/EventUtils.js"></script>
+    <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+    <script type="text/javascript" src="NavigationUtils.js"></script>
+    <style type="text/css">
+      iframe { width: 90%; height: 50px; }
+    </style>
+<script>
+if (!navigator.platform.startsWith("Win")) {
+  SimpleTest.expectAssertions(0, 1);
+}
+
+window.onload = async function() {
+  // navigateByLocation(window0);  // Don't have a handle to the window.
+  navigateByOpen("window1");
+  navigateByForm("window2");
+  navigateByHyperlink("window3");
+
+  await waitForFinishedFrames(6);
+
+  is((await getFramesByName("window1")).length, 2, "Should not be able to navigate popup's popup by calling window.open.");
+  is((await getFramesByName("window2")).length, 2, "Should not be able to navigate popup's popup by submitting form.");
+  is((await getFramesByName("window3")).length, 2, "Should not be able to navigate popup's popup by targeted hyperlink.");
+
+  // opener0.close();
+  opener1.close();
+  opener2.close();
+  opener3.close();
+
+  info("here")
+  await cleanupWindows();
+  info("there")
+  SimpleTest.finish();
+};
+
+// opener0 = window.open("http://test1.example.org:80/tests/docshell/test/navigation/open.html#window0", "_blank", "width=10,height=10");
+// eslint-disable-next-line @microsoft/sdl/no-insecure-url
+let opener1 = window.open("http://test1.example.org:80/tests/docshell/test/navigation/open.html#window1", "_blank", "width=10,height=10");
+// eslint-disable-next-line @microsoft/sdl/no-insecure-url
+let opener2 = window.open("http://test1.example.org:80/tests/docshell/test/navigation/open.html#window2", "_blank", "width=10,height=10");
+// eslint-disable-next-line @microsoft/sdl/no-insecure-url
+let opener3 = window.open("http://test1.example.org:80/tests/docshell/test/navigation/open.html#window3", "_blank", "width=10,height=10");
+</script>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=408052">Mozilla Bug 408052</a>
+<pre id="test">
+<script type="text/javascript">
+SimpleTest.waitForExplicitFinish();
+</script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_online_offline_bfcache.html b/docshell/test/navigation/test_online_offline_bfcache.html
new file mode 100644
index 0000000000..4ad90fd52e
--- /dev/null
+++ b/docshell/test/navigation/test_online_offline_bfcache.html
@@ -0,0 +1,101 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Online/Offline with BFCache</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
+  <script>
+
+    /*
+     * The test is designed to work with and without bfcache.
+     * (1) First the test opens a window which then loads another page which
+     * goes back to the original page to detect if bfcache is enabled. If
+     * bfcache isn't enabled, close message is sent to the opened window and it
+     * closes itself and sends a message back and the test finishes.
+     * (2) The browser is set to offline mode. The opened page sends message
+     * that it has received offline event. This controller page then asks the
+     * page to go forward. The page which comes out from the bfcache gets
+     * offline event and sends message about that to this controller.
+     * (3) Browser is set to online mode. Similar cycle as with offline happens.
+     * (4) Controller page sends close message to the opened window and it
+     * closes itself and sends a message back and the test finishes.
+     */
+
+    function offlineOnline(online) {
+      function offlineFn() {
+        /* eslint-env mozilla/chrome-script */
+        Services.io.offline = true;
+      }
+      function onlineFn() {
+        /* eslint-env mozilla/chrome-script */
+        Services.io.offline = false;
+      }
+      SpecialPowers.loadChromeScript(online ? onlineFn : offlineFn);
+    }
+
+    var bc = new BroadcastChannel("online_offline_bfcache");
+    var pageshowCount = 0;
+    var offlineCount = 0;
+    var onlineCount = 0;
+
+    bc.onmessage = function(event) {
+      if (event.data.event == "pageshow") {
+        ++pageshowCount;
+        info("pageshow " + pageshowCount);
+        if (pageshowCount == 1) {
+          ok(!event.data.persisted);
+          bc.postMessage("nextpage");
+        } else if (pageshowCount == 2) {
+          ok(!event.data.persisted);
+          bc.postMessage("back");
+        } else if (pageshowCount == 3) {
+          if (!event.data.persisted) {
+            info("BFCache is not enabled, return early");
+            bc.postMessage("close");
+          } else {
+            offlineOnline(false);
+          }
+        }
+      } else if (event.data == "offline") {
+        ++offlineCount;
+        info("offline " + offlineCount);
+        if (offlineCount == 1) {
+          bc.postMessage("forward");
+        } else if (offlineCount == 2) {
+          offlineOnline(true);
+        } else {
+          ok(false, "unexpected offline event");
+        }
+      }  else if (event.data == "online") {
+        ++onlineCount;
+        info("online " + onlineCount);
+        if (onlineCount == 1) {
+          bc.postMessage("back");
+        } else if (onlineCount == 2) {
+          bc.postMessage("close");
+        } else {
+          ok(false, "unexpected online event");
+        }
+      } else if ("closed") {
+        ok(true, "Did pass the test");
+        bc.close();
+        SimpleTest.finish();
+      }
+    };
+
+    function runTest() {
+      SpecialPowers.pushPrefEnv({"set": [["network.manage-offline-status", false]]}, function() {
+          window.open("file_online_offline_bfcache.html", "", "noopener");
+      });
+    }
+
+    SimpleTest.waitForExplicitFinish();
+  </script>
+</head>
+<body onload="runTest()">
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+<pre id="test"></pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_open_javascript_noopener.html b/docshell/test/navigation/test_open_javascript_noopener.html
new file mode 100644
index 0000000000..81a6b70d61
--- /dev/null
+++ b/docshell/test/navigation/test_open_javascript_noopener.html
@@ -0,0 +1,44 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
+  </head>
+  <body>
+  <script>
+
+add_task(async function test_open_javascript_noopener() {
+  const topic = "test-javascript-was-run";
+  function jsuri(version) {
+    return `javascript:SpecialPowers.notifyObservers(null, "${topic}", "${version}");window.close()`;
+  }
+
+  let seen = [];
+  function observer(_subject, _topic, data) {
+    info(`got notification ${data}`);
+    seen.push(data);
+  }
+  SpecialPowers.addObserver(observer, topic);
+
+  isDeeply(seen, [], "seen no test notifications");
+  window.open(jsuri("1"));
+
+  // Bounce off the parent process to make sure the JS will have run.
+  await SpecialPowers.spawnChrome([], () => {});
+
+  isDeeply(seen, ["1"], "seen the opener notification");
+
+  window.open(jsuri("2"), "", "noopener");
+
+  // Bounce off the parent process to make sure the JS will have run.
+  await SpecialPowers.spawnChrome([], () => {});
+
+  isDeeply(seen, ["1"], "didn't get a notification from the noopener popup");
+
+  SpecialPowers.removeObserver(observer, topic);
+});
+
+  </script>
+  </body>
+</html>
diff --git a/docshell/test/navigation/test_opener.html b/docshell/test/navigation/test_opener.html
new file mode 100644
index 0000000000..ce966b897d
--- /dev/null
+++ b/docshell/test/navigation/test_opener.html
@@ -0,0 +1,56 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <script src="/tests/SimpleTest/SimpleTest.js"></script>
+    <script src="/tests/SimpleTest/EventUtils.js"></script>
+    <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+    <script type="text/javascript" src="NavigationUtils.js"></script>
+    <style type="text/css">
+      iframe { width: 90%; height: 50px; }
+    </style>
+<script>
+if (navigator.platform.startsWith("Linux")) {
+  SimpleTest.expectAssertions(0, 1);
+}
+
+window.onload = async function() {
+  navigateByLocation(window0);
+  navigateByOpen("window1");
+  navigateByForm("window2");
+  navigateByHyperlink("window3");
+
+  await waitForFinishedFrames(4);
+  await isNavigated(window0, "Should be able to navigate popup by setting location.");
+  await isNavigated(window1, "Should be able to navigate popup by calling window.open.");
+  await isNavigated(window2, "Should be able to navigate popup by submitting form.");
+  await isNavigated(window3, "Should be able to navigate popup by targeted hyperlink.");
+
+  window0.close();
+  window1.close();
+  window2.close();
+  window3.close();
+
+  await cleanupWindows();
+
+  SimpleTest.finish();
+};
+
+// eslint-disable-next-line @microsoft/sdl/no-insecure-url
+var window0 = window.open("http://test1.example.org:80/tests/docshell/test/navigation/blank.html", "window0", "width=10,height=10");
+// eslint-disable-next-line @microsoft/sdl/no-insecure-url
+var window1 = window.open("http://test1.example.org:80/tests/docshell/test/navigation/blank.html", "window1", "width=10,height=10");
+// eslint-disable-next-line @microsoft/sdl/no-insecure-url
+var window2 = window.open("http://test1.example.org:80/tests/docshell/test/navigation/blank.html", "window2", "width=10,height=10");
+// eslint-disable-next-line @microsoft/sdl/no-insecure-url
+var window3 = window.open("http://test1.example.org:80/tests/docshell/test/navigation/blank.html", "window3", "width=10,height=10");
+</script>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=408052">Mozilla Bug 408052</a>
+<pre id="test">
+<script type="text/javascript">
+SimpleTest.waitForExplicitFinish();
+</script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_performance_navigation.html b/docshell/test/navigation/test_performance_navigation.html
new file mode 100644
index 0000000000..75abbdd767
--- /dev/null
+++ b/docshell/test/navigation/test_performance_navigation.html
@@ -0,0 +1,41 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=145971
+-->
+<head>
+  <title>Test for Bug 145971</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body onload="runTest()">
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=145971">Mozilla Bug 145971</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+  
+</div>
+<pre id="test">
+<script type="application/javascript">
+var testWindow;
+var bc = new BroadcastChannel("bug145971");
+bc.onmessage = function(msgEvent) {
+  var result = msgEvent.data.result;
+  if (result == undefined) {
+    info("Got unexpected message from BroadcastChannel");
+    return;
+  }
+  ok(result, "Bug 145971: Navigation type does not equal 2 when restoring document from session history.");
+  SimpleTest.finish();
+};
+
+function runTest() {
+  // If Fission is disabled, the pref is no-op.
+  SpecialPowers.pushPrefEnv({set: [["fission.bfcacheInParent", true]]}, () => {
+    window.open("test_bug145971.html", "", "width=360,height=480,noopener");
+  });
+}
+
+</script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_popup-navigates-children.html b/docshell/test/navigation/test_popup-navigates-children.html
new file mode 100644
index 0000000000..82d69e7982
--- /dev/null
+++ b/docshell/test/navigation/test_popup-navigates-children.html
@@ -0,0 +1,69 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <script src="/tests/SimpleTest/SimpleTest.js"></script>
+    <script src="/tests/SimpleTest/EventUtils.js"></script>
+    <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+    <script type="text/javascript" src="NavigationUtils.js"></script>
+    <style type="text/css">
+      iframe { width: 90%; height: 50px; }
+    </style>
+<script>
+
+let window0 = null;
+let window1 = null;
+let window2 = null;
+let window3 = null;
+
+function testChild0() {
+  if (!window.window0)
+    window0 = window.open("navigate.html#opener.frames[0],location", "window0", "width=10,height=10");
+}
+
+function testChild1() {
+  if (!window.window1)
+    window1 = window.open("navigate.html#child1,open", "window1", "width=10,height=10");
+}
+
+function testChild2() {
+  if (!window.window2)
+    window2 = window.open("navigate.html#child2,form", "window2", "width=10,height=10");
+}
+
+function testChild3() {
+  if (!window.window3)
+    window3 = window.open("navigate.html#child3,hyperlink", "window3", "width=10,height=10");
+}
+
+window.onload = async function() {
+  await waitForFinishedFrames(4);
+  await isNavigated(frames[0], "Should be able to navigate on-domain opener's children by setting location.");
+  await isNavigated(frames[1], "Should be able to navigate on-domain opener's children by calling window.open.");
+  await isNavigated(frames[2], "Should be able to navigate on-domain opener's children by submitting form.");
+  await isNavigated(frames[3], "Should be able to navigate on-domain opener's children by targeted hyperlink.");
+
+  window0.close();
+  window1.close();
+  window2.close();
+  window3.close();
+
+  await cleanupWindows();
+  SimpleTest.finish();
+};
+
+</script>
+</head>
+<body>
+<div id="frames">
+<iframe onload="testChild0()" name="child0" src="http://test1.example.org:80/tests/docshell/test/navigation/blank.html"></iframe>
+<iframe onload="testChild1()" name="child1" src="http://test1.example.org:80/tests/docshell/test/navigation/blank.html"></iframe>
+<iframe onload="testChild2()" name="child2" src="http://test1.example.org:80/tests/docshell/test/navigation/blank.html"></iframe>
+<iframe onload="testChild3()" name="child3" src="http://test1.example.org:80/tests/docshell/test/navigation/blank.html"></iframe>
+</div>
+<pre id="test">
+<script type="text/javascript">
+SimpleTest.waitForExplicitFinish();
+</script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_rate_limit_location_change.html b/docshell/test/navigation/test_rate_limit_location_change.html
new file mode 100644
index 0000000000..b1b51b92dd
--- /dev/null
+++ b/docshell/test/navigation/test_rate_limit_location_change.html
@@ -0,0 +1,100 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=1314912
+-->
+<head>
+  <meta charset="utf-8">
+  <title>Test for Bug 1314912</title>
+  <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+  <script type="application/javascript">
+
+  /** Test for Bug 1314912 */
+
+  const RATE_LIMIT_COUNT = 90;
+  const RATE_LIMIT_TIME_SPAN = 3;
+
+  async function setup() {
+    await SpecialPowers.pushPrefEnv({set: [
+      ["dom.navigation.locationChangeRateLimit.count", RATE_LIMIT_COUNT],
+      ["dom.navigation.locationChangeRateLimit.timespan", RATE_LIMIT_TIME_SPAN]]});
+  }
+
+  let inc = 0;
+
+  const rateLimitedFunctions = (win) => ({
+    "history.replaceState": () => win.history.replaceState(null, "test", `${win.location.href}#${inc++}`),
+    "history.pushState":  () => win.history.pushState(null, "test", `${win.location.href}#${inc++}`),
+    "history.back": () => win.history.back(),
+    "history.forward": () => win.history.forward(),
+    "history.go": () => win.history.go(-1),
+    "location.href": () => win.location.href = win.location.href + "",
+    "location.hash": () => win.location.hash = inc++,
+    "location.host": () => win.location.host = win.location.host + "",
+    "location.hostname": () => win.location.hostname = win.location.hostname + "",
+    "location.pathname": () => win.location.pathname = win.location.pathname + "",
+    "location.port": () => win.location.port = win.location.port + "",
+    "location.protocol": () => win.location.protocol = win.location.protocol + "",
+    "location.search": () => win.location.search = win.location.search + "",
+    "location.assign": () => win.location.assign(`${win.location.href}#${inc++}`),
+    "location.replace": () => win.location.replace(`${win.location.href}#${inc++}`),
+    "location.reload": () => win.location.reload(),
+  });
+
+  async function test() {
+    await setup();
+
+    // Open new window and wait for it to load
+    let win = window.open("blank.html");
+    await new Promise((resolve) => SimpleTest.waitForFocus(resolve, win))
+
+    // Execute the history and location functions
+    Object.entries(rateLimitedFunctions(win)).forEach(([name, fn]) => {
+      // Reset the rate limit for the next run.
+      info("Reset rate limit.");
+      SpecialPowers.wrap(win).browsingContext.resetLocationChangeRateLimit();
+
+      info(`Calling ${name} ${RATE_LIMIT_COUNT} times to reach the rate limit.`);
+      for(let i = 0; i< RATE_LIMIT_COUNT; i++) {
+        fn.call(this);
+      }
+      // Next calls should throw because we're above the rate limit
+      for(let i = 0; i < 5; i++)  {
+        SimpleTest.doesThrow(() => fn.call(this), `Call #${RATE_LIMIT_COUNT + i + 1} to ${name} should throw.`);
+      }
+    })
+
+    // We didn't reset the rate limit after the last loop iteration above.
+    // Wait for the rate limit timer to expire.
+    SimpleTest.requestFlakyTimeout("Waiting to trigger rate limit reset.");
+    await new Promise((resolve) => setTimeout(resolve, 5000));
+
+    // Calls should be allowed again.
+    Object.entries(rateLimitedFunctions(win)).forEach(([name, fn]) => {
+      let didThrow = false;
+      try {
+        fn.call(this);
+      } catch(error) {
+        didThrow = true;
+      }
+      is(didThrow, false, `Call to ${name} must not throw.`)
+    });
+
+    // Cleanup
+    win.close();
+    SpecialPowers.wrap(win).browsingContext.resetLocationChangeRateLimit();
+    SimpleTest.finish();
+  }
+
+  </script>
+</head>
+<body onload="setTimeout(test, 0);">
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1314912">Mozilla Bug 1314912</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+</div>
+<pre id="test">
+</pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_recursive_frames.html b/docshell/test/navigation/test_recursive_frames.html
new file mode 100644
index 0000000000..3ccc09dd14
--- /dev/null
+++ b/docshell/test/navigation/test_recursive_frames.html
@@ -0,0 +1,167 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Test for Recursive Loads</title>
+  <meta charset="utf-8">
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1597427">Mozilla Bug 1597427</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+
+</div>
+<pre id="test">
+  <script type="application/javascript">
+  const TEST_CASES = [
+    { // too many recursive iframes
+      frameId: "recursiveFrame",
+      expectedLocations: [
+        // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+        "http://example.com/tests/docshell/test/navigation/frame_recursive.html",
+        // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+        "http://example.com/tests/docshell/test/navigation/frame_recursive.html",
+        "about:blank",
+      ],
+    },
+    { // too many recursive iframes
+      frameId: "twoRecursiveIframes",
+      expectedLocations: [
+        // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+        "http://example.com/tests/docshell/test/navigation/frame_load_as_example_com.html",
+        // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+        "http://example.org/tests/docshell/test/navigation/frame_load_as_example_org.html",
+        // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+        "http://example.com/tests/docshell/test/navigation/frame_load_as_example_com.html",
+        // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+        "http://example.org/tests/docshell/test/navigation/frame_load_as_example_org.html",
+        "about:blank",
+      ],
+    },
+    { // too many recursive iframes
+      frameId: "threeRecursiveIframes",
+      expectedLocations: [
+        // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+        "http://sub1.test1.mochi.test:8888/tests/docshell/test/navigation/frame_load_as_host1.html",
+        // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+        "http://example.com/tests/docshell/test/navigation/frame_load_as_host2.html",
+        // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+        "http://test1.mochi.test:8888/tests/docshell/test/navigation/frame_load_as_host3.html",
+        // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+        "http://sub1.test1.mochi.test:8888/tests/docshell/test/navigation/frame_load_as_host1.html",
+        // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+        "http://example.com/tests/docshell/test/navigation/frame_load_as_host2.html",
+        // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+        "http://test1.mochi.test:8888/tests/docshell/test/navigation/frame_load_as_host3.html",
+        "about:blank",
+      ],
+    },
+    { // too many nested iframes
+      frameId: "sixRecursiveIframes",
+      expectedLocations: [
+        // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+        "http://example.com/tests/docshell/test/navigation/frame_1_out_of_6.html",
+        // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+        "http://test1.mochi.test:8888/tests/docshell/test/navigation/frame_2_out_of_6.html",
+        // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+        "http://sub1.test1.mochi.test:8888/tests/docshell/test/navigation/frame_3_out_of_6.html",
+        // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+        "http://sub2.xn--lt-uia.mochi.test:8888/tests/docshell/test/navigation/frame_4_out_of_6.html",
+        // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+        "http://test2.mochi.test:8888/tests/docshell/test/navigation/frame_5_out_of_6.html",
+        // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+        "http://example.org/tests/docshell/test/navigation/frame_6_out_of_6.html",
+        // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+        "http://example.com/tests/docshell/test/navigation/frame_1_out_of_6.html",
+        // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+        "http://test1.mochi.test:8888/tests/docshell/test/navigation/frame_2_out_of_6.html",
+      ],
+    },
+    { // too many recursive objects
+      frameId: "recursiveObject",
+      expectedLocations: [
+        // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+        "http://sub2.xn--lt-uia.mochi.test:8888/tests/docshell/test/navigation/object_recursive_load.html",
+        // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+        "http://sub2.xn--lt-uia.mochi.test:8888/tests/docshell/test/navigation/object_recursive_load.html",
+      ],
+    },
+    { // 3 nested srcdocs, should show all of them
+      frameId: "nestedSrcdoc",
+      expectedLocations: [
+        "about:srcdoc",
+        // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+        "http://example.com/tests/docshell/test/navigation/file_nested_srcdoc.html",
+        "about:srcdoc",
+        "about:srcdoc",
+      ],
+    },
+  ];
+
+  async function checkRecursiveLoad(level) {
+    let el = content.document.getElementById("static");
+    let documentURI = await SpecialPowers.spawn(
+      el,
+      [],
+      () => this.content.document.documentURI
+    );
+    if (documentURI == "about:blank") {
+      // If we had too many recursive frames, the most inner iframe's uri will be about:blank
+      return [documentURI];
+    }
+    if (documentURI == "about:srcdoc" && level == 3) {
+      // Check that we have the correct most inner srcdoc iframe
+      let innerText = await SpecialPowers.spawn(
+        el,
+        [],
+        () => this.content.document.body.innerText
+      );
+      is(innerText, "Third nested srcdoc", "correct most inner srcdoc iframe");
+    }
+    let nestedIfrOrObjectURI = [];
+    try {
+      // Throws an error when we have too many nested frames/objects, because we
+      // claim to have no content window for the inner most frame/object.
+      nestedIfrOrObjectURI = await SpecialPowers.spawn(
+        el,
+        [level + 1],
+        checkRecursiveLoad
+      );
+    } catch (err) {
+      info(
+        `Tried to spawn another task in the iframe/object, but got err: ${err}, must have had too many nested iframes/objects\n`
+      );
+    }
+    return [documentURI, ...nestedIfrOrObjectURI];
+  }
+
+  add_task(async () => {
+    for (const testCase of TEST_CASES) {
+      let el = document.getElementById(testCase.frameId);
+      let loc = await SpecialPowers.spawn(
+        el,
+        [],
+        () => this.content.location.href
+      );
+      let locations = await SpecialPowers.spawn(el, [1], checkRecursiveLoad);
+      isDeeply(
+        [loc, ...locations],
+        testCase.expectedLocations,
+        "iframes/object loaded in correct order"
+      );
+    }
+  });
+
+  </script>
+</pre>
+<div>
+  <iframe style="height: 100vh; width:25%;" id="recursiveFrame" src="http://example.com/tests/docshell/test/navigation/frame_recursive.html"></iframe>
+  <iframe style="height: 100vh; width:25%;" id="twoRecursiveIframes" src="http://example.com/tests/docshell/test/navigation/frame_load_as_example_com.html"></iframe>
+  <iframe style="height: 100vh; width:25%;" id="threeRecursiveIframes" src="http://sub1.test1.mochi.test:8888/tests/docshell/test/navigation/frame_load_as_host1.html"></iframe>
+  <iframe style="height: 100vh; width:25%;" id="sixRecursiveIframes" src="http://example.com/tests/docshell/test/navigation/frame_1_out_of_6.html"></iframe>
+  <object width="400" height="300" id="recursiveObject" data="http://sub2.xn--lt-uia.mochi.test:8888/tests/docshell/test/navigation/object_recursive_load.html"></object> 
+  <iframe id="nestedSrcdoc" srcdoc="Srcdoc that will embed an iframe &lt;iframe id=&quot;static&quot; src=&quot;http://example.com/tests/docshell/test/navigation/file_nested_srcdoc.html&quot;&gt;&lt;/iframe&gt;"></iframe>
+</div>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_reload.html b/docshell/test/navigation/test_reload.html
new file mode 100644
index 0000000000..7e75c7c035
--- /dev/null
+++ b/docshell/test/navigation/test_reload.html
@@ -0,0 +1,42 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Ensure a page which is otherwise bfcacheable doesn't crash on reload</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
+  <script>
+    SimpleTest.waitForExplicitFinish();
+    let pageshowCount = 0;
+    let bc = new BroadcastChannel("test_reload");
+    bc.onmessage = function(event) {
+      info("MessageEvent: " + event.data);
+      if (event.data == "pageshow") {
+        ++pageshowCount;
+        info("pageshow: " + pageshowCount);
+        if (pageshowCount < 3) {
+          info("Sending reload");
+          bc.postMessage("reload");
+        } else {
+          info("Sending close");
+          bc.postMessage("close");
+        }
+      } else if (event.data == "closed") {
+        info("closed");
+        bc.close();
+        ok(true, "Passed");
+        SimpleTest.finish();
+      }
+    }
+
+    function test() {
+      window.open("file_reload.html", "", "noopener");
+    }
+  </script>
+</head>
+<body onload="test()">
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+<pre id="test"></pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_reload_large_postdata.html b/docshell/test/navigation/test_reload_large_postdata.html
new file mode 100644
index 0000000000..15fae33ac3
--- /dev/null
+++ b/docshell/test/navigation/test_reload_large_postdata.html
@@ -0,0 +1,61 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<p id="display"></p>
+
+<form id="form" action="file_reload_large_postdata.sjs" target="_blank" rel="opener" method="POST">
+  <input id="input" name="payload" type="hidden" value=""/>
+</form>
+
+<pre id="test">
+<script>
+// This is derived from `kTooLargeStream` in `IPCStreamUtils.cpp`.
+const kTooLargeStream = 1024 * 1024;
+
+function waitForPopup(expected) {
+  return new Promise(resolve => {
+    addEventListener("message", evt => {
+      info("got message!");
+      is(evt.source.opener, window, "the event source's opener should be this window");
+      is(evt.data, expected, "got the expected data from the popup");
+      resolve(evt.source);
+    }, { once: true });
+  });
+}
+
+add_task(async function() {
+  await SpecialPowers.pushPrefEnv({"set": [["dom.confirm_repost.testing.always_accept", true]]});
+  let form = document.getElementById("form");
+  let input = document.getElementById("input");
+
+  // Create a very large value to include in the post payload. This should
+  // ensure that the value isn't sent directly over IPC, and is instead sent as
+  // an async inputstream.
+  let payloadSize = kTooLargeStream;
+
+  let popupReady = waitForPopup(payloadSize);
+  input.value = "A".repeat(payloadSize);
+  form.submit();
+
+  let popup = await popupReady;
+  try {
+    let popupReady2 = waitForPopup(payloadSize);
+    info("reloading popup");
+    popup.location.reload();
+    let popup2 = await popupReady2;
+    is(popup, popup2);
+  } finally {
+    popup.close();
+  }
+});
+
+// The .sjs server can time out processing the 1mb payload in debug builds.
+SimpleTest.requestLongerTimeout(2);
+</script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_reload_nonbfcached_srcdoc.html b/docshell/test/navigation/test_reload_nonbfcached_srcdoc.html
new file mode 100644
index 0000000000..2399a0ad7d
--- /dev/null
+++ b/docshell/test/navigation/test_reload_nonbfcached_srcdoc.html
@@ -0,0 +1,40 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Test srcdoc handling when reloading a page.</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
+  <script>
+    // The old session history implementation asserts in
+    // https://searchfox.org/mozilla-central/rev/b822a27de3947d3f4898defac6164e52caf1451b/docshell/shistory/nsSHEntry.cpp#670-672
+    SimpleTest.expectAssertions(0, 1);
+    SimpleTest.waitForExplicitFinish();
+
+    var win;
+    function test() {
+      window.onmessage = function(event) {
+        if (event.data == "pageload:") {
+          // Trigger a similar reload as what the reload button does.
+          SpecialPowers.wrap(win)
+                       .docShell
+                       .QueryInterface(SpecialPowers.Ci.nsIWebNavigation)
+                       .sessionHistory
+                       .reload(0);
+        } else if (event.data == "pageload:second") {
+          ok(true, "srcdoc iframe was updated.");
+          win.close();
+          SimpleTest.finish();
+        }
+      }
+      win = window.open("file_reload_nonbfcached_srcdoc.sjs");
+    }
+
+  </script>
+</head>
+<body onload="test()">
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+<pre id="test"></pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_reserved.html b/docshell/test/navigation/test_reserved.html
new file mode 100644
index 0000000000..0242f3941b
--- /dev/null
+++ b/docshell/test/navigation/test_reserved.html
@@ -0,0 +1,92 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <script src="/tests/SimpleTest/SimpleTest.js"></script>
+    <script src="/tests/SimpleTest/EventUtils.js"></script>
+    <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+    <script type="text/javascript" src="NavigationUtils.js"></script>
+    <style type="text/css">
+      iframe { width: 90%; height: 200px; }
+    </style>
+<script>
+if (navigator.platform.startsWith("Mac")) {
+  SimpleTest.expectAssertions(0, 2);
+}
+
+async function testTop() {
+  let window0 = window.open("iframe.html#http://test1.example.org:80/tests/docshell/test/navigation/navigate.html#top,location", "_blank", "width=10,height=10");
+
+  await waitForFinishedFrames(1);
+  isInaccessible(window0, "Should be able to navigate off-domain top by setting location.");
+  window0.close();
+  await cleanupWindows();
+
+  let window1 = window.open("iframe.html#http://test1.example.org:80/tests/docshell/test/navigation/navigate.html#_top,open", "_blank", "width=10,height=10");
+
+  await waitForFinishedFrames(1);
+  isInaccessible(window1, "Should be able to navigate off-domain top by calling window.open.");
+  window1.close();
+  await cleanupWindows();
+
+  let window2 = window.open("iframe.html#http://test1.example.org:80/tests/docshell/test/navigation/navigate.html#_top,form", "_blank", "width=10,height=10");
+
+  await waitForFinishedFrames(1);
+  isInaccessible(window2, "Should be able to navigate off-domain top by submitting form.");
+  window2.close();
+  await cleanupWindows();
+
+  let window3 = window.open("iframe.html#http://test1.example.org:80/tests/docshell/test/navigation/navigate.html#_top,hyperlink", "_blank", "width=10,height=10");
+
+  await waitForFinishedFrames(1);
+  isInaccessible(window3, "Should be able to navigate off-domain top by targeted hyperlink.");
+  window3.close();
+  await cleanupWindows();
+
+  await testParent();
+}
+
+async function testParent() {
+  document.getElementById("frames").innerHTML = '<iframe src="iframe.html#http://test1.example.org:80/tests/docshell/test/navigation/navigate.html#parent,location"></iframe>';
+
+  await waitForFinishedFrames(1);
+  isAccessible(frames[0], "Should not be able to navigate off-domain parent by setting location.");
+  await cleanupWindows();
+
+  document.getElementById("frames").innerHTML = '<iframe src="iframe.html#http://test1.example.org:80/tests/docshell/test/navigation/navigate.html#_parent,open"></iframe>';
+
+  await waitForFinishedFrames(1);
+  isAccessible(frames[0], "Should not be able to navigate off-domain parent by calling window.open.");
+  await cleanupWindows();
+
+  document.getElementById("frames").innerHTML = '<iframe src="iframe.html#http://test1.example.org:80/tests/docshell/test/navigation/navigate.html#_parent,form"></iframe>';
+
+  await waitForFinishedFrames(1);
+  isAccessible(frames[0], "Should not be able to navigate off-domain parent by submitting form.");
+  await cleanupWindows();
+
+  document.getElementById("frames").innerHTML = '<iframe src="iframe.html#http://test1.example.org:80/tests/docshell/test/navigation/navigate.html#_parent,hyperlink"></iframe>';
+
+  await waitForFinishedFrames(1);
+  isAccessible(frames[0], "Should not be able to navigate off-domain parent by targeted hyperlink.");
+  await cleanupWindows();
+
+  document.getElementById("frames").innerHTML = "";
+  SimpleTest.finish();
+}
+
+window.onload = async function() {
+  await testTop();
+};
+</script>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=408052">Mozilla Bug 408052</a>
+<div id="frames">
+</div>
+<pre id="test">
+<script type="text/javascript">
+SimpleTest.waitForExplicitFinish();
+</script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_same_url.html b/docshell/test/navigation/test_same_url.html
new file mode 100644
index 0000000000..820caa7005
--- /dev/null
+++ b/docshell/test/navigation/test_same_url.html
@@ -0,0 +1,56 @@
+
+<!DOCTYPE HTML>
+<html>
+<head>
+    <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+    <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+    <script type="application/javascript" src="/tests/SimpleTest/SpecialPowers.js"></script>
+    <script type="application/javascript">
+    // Since BFCache in parent requires no opener, use BroadcastChannel
+    // to communicate with file_same_url.html.
+    let bc = new BroadcastChannel("test_same_url");
+    async function test() {
+        var promise;
+        let historyLength;
+
+        promise = waitForLoad();
+        window.open("file_same_url.html", "_blank", "noopener=yes");
+        historyLength = await promise;
+        is(historyLength, 1, "before same page navigation");
+
+        promise = waitForLoad();
+        bc.postMessage("linkClick");
+        historyLength = await promise;
+        is(historyLength, 1, "after same page navigation");
+        bc.postMessage("closeWin");
+
+        SimpleTest.finish();
+    }
+
+    async function waitForLoad() {
+        return new Promise(resolve => {
+            let listener = e => {
+                if (e.data.bodyOnLoad) {
+                    bc.removeEventListener("message", listener);
+                    setTimeout(() => resolve(e.data.bodyOnLoad), 0);
+                }
+            };
+            bc.addEventListener("message", listener);
+        });
+    }
+    </script>
+</head>
+
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1745730">Bug 1745730</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+</div>
+<pre id="test">
+<script type="text/javascript">
+SimpleTest.waitForExplicitFinish();
+</script>
+</pre>
+<body onload="test()">
+</body>
+</html>
+
diff --git a/docshell/test/navigation/test_scrollRestoration.html b/docshell/test/navigation/test_scrollRestoration.html
new file mode 100644
index 0000000000..d31598f391
--- /dev/null
+++ b/docshell/test/navigation/test_scrollRestoration.html
@@ -0,0 +1,214 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=
+-->
+<head>
+  <title>Test for Bug 1155730</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body onload="runTest()">
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1155730">Mozilla Bug 1155730</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+
+</div>
+<pre id="test">
+  <script type="application/javascript">
+    SimpleTest.waitForExplicitFinish();
+    SimpleTest.requestFlakyTimeout("untriaged");
+
+    function assertCheck(data) {
+      if (data.assertIs) {
+        for (const args of data.assertIs) {
+          is(args[0], args[1], args[2]);
+        }
+      }
+      if (data.assertOk) {
+        for (const args of data.assertOk) {
+          ok(args[0], args[1]);
+        }
+      }
+      if (data.assertIsNot) {
+        for (const args of data.assertIsNot) {
+          isnot(args[0], args[1], args[2]);
+        }
+      }
+    }
+
+    var bc1, currentCase = 0;
+    function test1() {
+      bc1 = new BroadcastChannel("bug1155730_part1");
+      bc1.onmessage = (msgEvent) => {
+        var msg = msgEvent.data;
+        var command = msg.command;
+        if (command == "pageshow") {
+          currentCase++;
+          var persisted = msg.persisted;
+          is(persisted, false, "Shouldn't have persisted session history entry.");
+          bc1.postMessage({command: "test", currentCase});
+        } else if (command == "asserts") {
+          is(msg.currentCase, currentCase, "correct case");
+          info(`Checking asserts for case ${msg.currentCase}`);
+          assertCheck(msg);
+          if (currentCase == 3) {
+            // move on to the next test
+            bc1.close();
+            test2();
+          }
+        }
+      }
+      window.open("file_scrollRestoration_part1_nobfcache.html", "", "width=360,height=480,noopener");
+    }
+
+    var bc2, bc2navigate;
+    function test2() {
+      currentCase = 0;
+      bc2 = new BroadcastChannel("bug1155730_part2");
+      bc2.onmessage = (msgEvent) => {
+        var msg = msgEvent.data;
+        var command = msg.command;
+        if (command == "pageshow") {
+          currentCase++;
+          var persisted = msg.persisted;
+          switch (currentCase) {
+            case 1:
+              is(persisted, false, "Shouldn't have persisted session history entry.");
+              break;
+            case 2:
+              is(persisted, true, "Should have persisted session history entry.");
+          }
+          bc2.postMessage({command: "test", currentCase});
+        } else if (command == "asserts") {
+          is(msg.currentCase, currentCase, "correct case");
+          info(`Checking asserts for case ${msg.currentCase}`);
+          assertCheck(msg);
+          if (currentCase == 3) {
+            // move on to the next test
+            bc2.close();
+            test3();
+          }
+        } else if (command == "nextCase") {
+          currentCase++;
+        }
+      }
+
+      bc2navigate = new BroadcastChannel("navigate");
+      bc2navigate.onmessage = (event) => {
+        if (event.data.command == "loaded") {
+          bc2navigate.postMessage({command: "back"})
+          bc2navigate.close();
+        }
+      }
+      window.open("file_scrollRestoration_part2_bfcache.html", "", "width=360,height=480,noopener");
+    }
+
+    var bc3, bc3navigate;
+    function test3() {
+      currentCase = 0;
+      bc3 = new BroadcastChannel("bug1155730_part3");
+      bc3.onmessage = (msgEvent) => {
+        var msg = msgEvent.data;
+        var command = msg.command;
+        if (command == "pageshow") {
+          currentCase++;
+          if (currentCase == 3) {
+            var persisted = msg.persisted;
+            is(persisted, false, "Shouldn't have persisted session history entry.");
+          }
+
+          bc3.postMessage({command: "test", currentCase});
+        } else if (command == "asserts") {
+          is(msg.currentCase, currentCase, "correct case");
+          info(`Checking asserts for case ${msg.currentCase}`);
+          assertCheck(msg);
+        } else if (command == "nextCase") {
+          currentCase++;
+        } else if (command == "finishing") {
+          bc3.close();
+          test4();
+        }
+      }
+
+      bc3navigate = new BroadcastChannel("navigate");
+      bc3navigate.onmessage = (event) => {
+        if (event.data.command == "loaded") {
+          is(event.data.scrollRestoration, 'auto', "correct scroll restoration");
+          bc3navigate.postMessage({command: "back"})
+          bc3navigate.close();
+        }
+      }
+      window.open("file_scrollRestoration_part3_nobfcache.html", "", "width=360,height=480,noopener");
+    }
+
+    // test4 opens a new page which can enter bfcache. That page then loads
+    // another page which can't enter bfcache. That second page then scrolls
+    // down. History API is then used to navigate back and forward. When the
+    // second page loads again, it should scroll down automatically.
+    var bc4a, bc4b;
+    var scrollYCounter = 0;
+    function test4() {
+      currentCase = 0;
+      bc4a = new BroadcastChannel("bfcached");
+      bc4a.onmessage = (msgEvent) => {
+        var msg = msgEvent.data;
+        var command = msg.command;
+        if (command == "pageshow") {
+          ++currentCase;
+          if (currentCase == 1) {
+            ok(!msg.persisted, "The first page should not be persisted initially.");
+            bc4a.postMessage("loadNext");
+          } else if (currentCase == 3) {
+            ok(msg.persisted, "The first page should be persisted.");
+            bc4a.postMessage("forward");
+            bc4a.close();
+          }
+        }
+      }
+
+      bc4b = new BroadcastChannel("notbfcached");
+      bc4b.onmessage = (event) => {
+        var msg = event.data;
+        var command = msg.command;
+        if (command == "pageshow") {
+          ++currentCase;
+          if (currentCase == 2) {
+            ok(!msg.persisted, "The second page should not be persisted.");
+            bc4b.postMessage("getScrollY");
+            bc4b.postMessage("scroll");
+            bc4b.postMessage("getScrollY");
+            bc4b.postMessage("back");
+          } else if (currentCase == 4) {
+            ok(!msg.persisted, "The second page should not be persisted.");
+            bc4b.postMessage("getScrollY");
+          }
+        } else if (msg == "closed") {
+          bc4b.close();
+          SimpleTest.finish();
+        } else if ("scrollY" in msg) {
+          ++scrollYCounter;
+          if (scrollYCounter == 1) {
+            is(msg.scrollY, 0, "The page should be initially scrolled to top.");
+          } else if (scrollYCounter == 2) {
+            isnot(msg.scrollY, 0, "The page should be then scrolled down.");
+          } else if (scrollYCounter == 3) {
+            isnot(msg.scrollY, 0, "The page should be scrolled down after being restored from the session history.");
+            bc4b.postMessage("close");
+          }
+        }
+      }
+      window.open("file_scrollRestoration_bfcache_and_nobfcache.html", "", "width=360,height=480,noopener");
+    }
+
+    function runTest() {
+      // If Fission is disabled, the pref is no-op.
+      SpecialPowers.pushPrefEnv({set: [["fission.bfcacheInParent", true]]}, () => {
+        test1();
+      });
+    }
+
+  </script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_session_history_entry_cleanup.html b/docshell/test/navigation/test_session_history_entry_cleanup.html
new file mode 100644
index 0000000000..a55de0d6c3
--- /dev/null
+++ b/docshell/test/navigation/test_session_history_entry_cleanup.html
@@ -0,0 +1,35 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=
+-->
+<head>
+  <title>Test for Bug 534178</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body onload="runTest()">
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=534178">Mozilla Bug 534178</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+
+</div>
+<pre id="test">
+  <script type="application/javascript">
+    SimpleTest.waitForExplicitFinish();
+
+    var testWindow;
+    function runTest() {
+        testWindow = window.open("file_bug534178.html", "", "width=360,height=480");
+        testWindow.onunload = function() { }; // to prevent bfcache
+    }
+
+    function finishTest() {
+      testWindow.close();
+      SimpleTest.finish();
+    }
+
+  </script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_session_history_on_redirect.html b/docshell/test/navigation/test_session_history_on_redirect.html
new file mode 100644
index 0000000000..a303f81536
--- /dev/null
+++ b/docshell/test/navigation/test_session_history_on_redirect.html
@@ -0,0 +1,92 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Session history on redirect</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
+  <script>
+    /*
+     * The test opens a new window and loads a page there. Then another document
+     * is loaded to the window. The initial load of that second page doesn't do
+     * a redirect. Now another non-redirecting page is loaded. Then
+     * history.go(-2) and history.forward() are called. The second time
+     * the second page is loaded, it does a redirect. history.back() and
+     * history.forward() are called again. The page which did the redirect
+     * shouldn't be accessed, but the page which it redirected to.
+     * Finally history.forward() is called again and the third page should be
+     * loaded and history.length should have the same value as it had when the
+     * third page was loaded the first time.
+     */
+
+    SimpleTest.waitForExplicitFinish();
+    var win;
+    var finalHistoryLength = 0;
+
+    function run() {
+      win = window.open("file_session_history_on_redirect.html");
+    }
+
+    var pageshowCounter = 0;
+    async function pageshow() {
+      // Need to trigger new loads asynchronously after page load, otherwise
+      // new loads are treated as replace loads.
+      await new Promise((r) => setTimeout(r));
+      ++pageshowCounter;
+      info("Page load: " + win.location.href);
+      switch (pageshowCounter) {
+        case 1:
+          ok(win.location.href.includes("file_session_history_on_redirect.html"));
+          win.location.href = "redirect_handlers.sjs";
+          break;
+        case 2:
+          ok(win.location.href.includes("redirect_handlers.sjs"));
+          // Put the initial page also as the last entry in the session history.
+          win.location.href = "file_session_history_on_redirect.html";
+          break;
+        case 3:
+          ok(win.location.href.includes("file_session_history_on_redirect.html"));
+          finalHistoryLength = win.history.length;
+          win.history.go(-2);
+          break;
+        case 4:
+          ok(win.location.href.includes("file_session_history_on_redirect.html"));
+          win.history.forward();
+          break;
+        case 5:
+          ok(win.location.href.includes("file_session_history_on_redirect_2.html"));
+          win.history.back();
+          break;
+        case 6:
+          ok(win.location.href.includes("file_session_history_on_redirect.html"));
+          win.history.forward();
+          break;
+        case 7:
+          ok(win.location.href.includes("file_session_history_on_redirect_2.html"));
+          is(win.history.length, finalHistoryLength, "Shouldn't have changed the history length.");
+          win.history.forward();
+          break;
+        case 8:
+          ok(win.location.href.includes("file_session_history_on_redirect.html"));
+          is(win.history.length, finalHistoryLength, "Shouldn't have changed the history length.");
+          win.onpagehide = null;
+          finishTest();
+          break;
+        default:
+            ok(false, "unexpected pageshow");
+      }
+    }
+
+    function finishTest() {
+      win.close()
+      SimpleTest.finish();
+    }
+
+  </script>
+</head>
+<body onload="run()">
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+<pre id="test"></pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_sessionhistory.html b/docshell/test/navigation/test_sessionhistory.html
new file mode 100644
index 0000000000..2254ec876b
--- /dev/null
+++ b/docshell/test/navigation/test_sessionhistory.html
@@ -0,0 +1,48 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=
+-->
+<head>
+  <title>Test for Bug 462076</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body onload="nextTest()">
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=462076">Mozilla Bug 462076</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+
+</div>
+<pre id="test">
+  <script type="application/javascript">
+    var testFiles =
+      [ "file_bug462076_1.html",         // Dynamic frames before onload
+        "file_bug462076_2.html",         // Dynamic frames when handling onload
+        "file_bug462076_3.html",         // Dynamic frames after onload
+      ];
+    var testCount = 0; // Used by the test files.
+
+    SimpleTest.waitForExplicitFinish();
+
+    var testWindow;
+    function nextTest_() {
+      if (testFiles.length) {
+        testCount = 0;
+        let nextFile = testFiles.shift();
+        info("Running " + nextFile);
+        testWindow = window.open(nextFile, "", "width=360,height=480");
+        testWindow.onunload = function() { }; // to prevent bfcache
+      } else {
+        SimpleTest.finish();
+      }
+    }
+
+    function nextTest() {
+      setTimeout(nextTest_, 0);
+    }
+
+  </script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_sessionhistory_document_write.html b/docshell/test/navigation/test_sessionhistory_document_write.html
new file mode 100644
index 0000000000..2a48a8154e
--- /dev/null
+++ b/docshell/test/navigation/test_sessionhistory_document_write.html
@@ -0,0 +1,34 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=
+-->
+<head>
+  <title>Test for Session history + document.write</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body onload="runTest()">
+<p id="display"></p>
+<div id="content" style="display: none">
+
+</div>
+<pre id="test">
+  <script type="application/javascript">
+    SimpleTest.waitForExplicitFinish();
+
+    var testWindow;
+    function runTest() {
+      testWindow = window.open("file_document_write_1.html", "", "width=360,height=480");
+      testWindow.onunload = function() { }; // to prevent bfcache
+    }
+
+    function finishTest() {
+      testWindow.close();
+      SimpleTest.finish();
+    }
+
+  </script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_sessionhistory_iframe_removal.html b/docshell/test/navigation/test_sessionhistory_iframe_removal.html
new file mode 100644
index 0000000000..242e3baade
--- /dev/null
+++ b/docshell/test/navigation/test_sessionhistory_iframe_removal.html
@@ -0,0 +1,33 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=
+-->
+<head>
+  <title>Test for Session history + document.write</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body onload="runTest()">
+<p id="display"></p>
+<div id="content" style="display: none">
+
+</div>
+<pre id="test">
+  <script type="application/javascript">
+    SimpleTest.waitForExplicitFinish();
+
+    var testWindow;
+    function runTest() {
+      testWindow = window.open("file_sessionhistory_iframe_removal.html", "", "width=360,height=480");
+    }
+
+    function finishTest() {
+      testWindow.close();
+      SimpleTest.finish();
+    }
+
+  </script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_shiftReload_and_pushState.html b/docshell/test/navigation/test_shiftReload_and_pushState.html
new file mode 100644
index 0000000000..7525e2e21f
--- /dev/null
+++ b/docshell/test/navigation/test_shiftReload_and_pushState.html
@@ -0,0 +1,35 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=
+-->
+<head>
+  <title>Test for Bug 1003100</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body onload="runTest()">
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1003100">Mozilla Bug 1003100</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+
+</div>
+<pre id="test">
+  <script type="application/javascript">
+    SimpleTest.waitForExplicitFinish();
+
+    var testWindow;
+    function runTest() {
+        testWindow = window.open("file_shiftReload_and_pushState.html", "", "width=360,height=480");
+        testWindow.onunload = function() { }; // to prevent bfcache
+    }
+
+    function finishTest() {
+      testWindow.close();
+      SimpleTest.finish();
+    }
+
+  </script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_ship_beforeunload_fired.html b/docshell/test/navigation/test_ship_beforeunload_fired.html
new file mode 100644
index 0000000000..e43711676b
--- /dev/null
+++ b/docshell/test/navigation/test_ship_beforeunload_fired.html
@@ -0,0 +1,63 @@
+<html>
+  <head>
+    <title>
+      Test that ensures beforeunload is fired when session-history-in-parent is enabled
+    </title>
+    <script src="/tests/SimpleTest/SimpleTest.js"></script>
+    <link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
+  </head>
+  <script>
+    SimpleTest.waitForExplicitFinish();
+
+    /*
+     * This test ensures beforeunload is fired on the current page
+     * when it is entering BFCache and the next page is coming out
+     * from BFCache
+     *
+     * (1) The controller page opens a new window, and page A is loaded there.
+     * (2) Page A then navigates to page B, and a beforeunload event
+     *     listener is registered on page B.
+     * (3) Page B then navigates back to page A, and the beforeunload handler
+     *     should send a message to the controller page.
+     * (4) Page A then navigates back to page B to check if page B has
+     *     been successfully added to BFCache.
+     */
+
+    var bc = new BroadcastChannel("ship_beforeunload");
+    var pageshowCount = 0;
+    var beforeUnloadFired = false;
+    bc.onmessage = function(event) {
+      if (event.data.type == "pageshow") {
+        ++pageshowCount;
+        if (pageshowCount == 1) {
+          bc.postMessage({action: "navigate_to_page_b"});
+        } else if (pageshowCount == 2) {
+          ok(!event.data.persisted, "?pageb shouldn't in BFCache because it's the first navigation");
+          bc.postMessage({action: "register_beforeunload", loadNextPageFromSessionHistory: true});
+        } else if (pageshowCount == 3) {
+          ok(event.data.persisted, "navigated back to page A that was in BFCacache from page B");
+          ok(beforeUnloadFired, "beforeunload has fired on page B");
+          bc.postMessage({action: "back_to_page_b", forwardNavigateToPageB: true});
+        } else if (pageshowCount == 4) {
+          ok(event.data.persisted, "page B has beforeunload fired and also entered BFCache");
+          bc.postMessage({action: "close"});
+          SimpleTest.finish();
+        }
+      } else if (event.data == "beforeunload_fired") {
+        beforeUnloadFired = true;
+      }
+    }
+
+    function runTest() {
+      SpecialPowers.pushPrefEnv({"set": [
+          ["fission.bfcacheInParent", true],
+          ["docshell.shistory.bfcache.ship_allow_beforeunload_listeners", true]
+        ]},
+        function() {
+          window.open("file_ship_beforeunload_fired.html", "", "noopener");
+        }
+      );
+    }
+  </script>
+  <body onload="runTest()"></body>
+</html>
diff --git a/docshell/test/navigation/test_ship_beforeunload_fired_2.html b/docshell/test/navigation/test_ship_beforeunload_fired_2.html
new file mode 100644
index 0000000000..93669502a5
--- /dev/null
+++ b/docshell/test/navigation/test_ship_beforeunload_fired_2.html
@@ -0,0 +1,65 @@
+<html>
+  <head>
+    <title>
+      Test that ensures beforeunload is fired when session-history-in-parent is enabled
+    </title>
+    <script src="/tests/SimpleTest/SimpleTest.js"></script>
+    <link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
+  </head>
+  <script>
+    SimpleTest.waitForExplicitFinish();
+
+    /*
+     * This test ensures beforeunload is fired on the current page
+     * when it is entering BFCache, and the next page is not coming from
+     * session history and also not coming out from BFCache.
+     *
+     * (1) The controller page opens a new window, and page A is loaded there.
+     * (2) Page A then navigates to page B, and a beforeunload event
+     *     listener is registered on page B.
+     * (3) Page B then navigates to page C, and the beforeunload handler
+     *     should send a message to the controller page.
+     * (4) Page C then navigates back to page B to check if page B has
+     *     been successfully added to BFCache.
+     */
+
+    var bc = new BroadcastChannel("ship_beforeunload");
+    var pageshowCount = 0;
+
+    var beforeUnloadFired = false;
+    bc.onmessage = function(event) {
+      if (event.data.type == "pageshow") {
+        ++pageshowCount;
+        if (pageshowCount == 1) {
+          bc.postMessage({action: "navigate_to_page_b"});
+        } else if (pageshowCount == 2) {
+          ok(!event.data.persisted, "?page B shouldn't in BFCache because it's the first navigation");
+          bc.postMessage({action: "register_beforeunload",
+            loadNextPageFromSessionHistory: false});
+        } else if (pageshowCount == 3) {
+          ok(!event.data.persisted, "navigated to page C that was a new page");
+          ok(beforeUnloadFired, "beforeUnload should be fired on page B");
+          bc.postMessage({action: "back_to_page_b", forwardNavigateToPageB: false});
+        } else if (pageshowCount == 4) {
+          ok(event.data.persisted, "page B has been successfully added to BFCache");
+          bc.postMessage({action: "close"});
+          SimpleTest.finish();
+        }
+      } else if (event.data == "beforeunload_fired") {
+        beforeUnloadFired = true;
+      }
+    }
+
+    function runTest() {
+      SpecialPowers.pushPrefEnv({"set": [
+          ["fission.bfcacheInParent", true],
+          ["docshell.shistory.bfcache.ship_allow_beforeunload_listeners", true]
+        ]},
+        function() {
+          window.open("file_ship_beforeunload_fired.html", "", "noopener");
+        }
+      );
+    }
+  </script>
+  <body onload="runTest()"></body>
+</html>
diff --git a/docshell/test/navigation/test_ship_beforeunload_fired_3.html b/docshell/test/navigation/test_ship_beforeunload_fired_3.html
new file mode 100644
index 0000000000..8951f269c5
--- /dev/null
+++ b/docshell/test/navigation/test_ship_beforeunload_fired_3.html
@@ -0,0 +1,65 @@
+<html>
+  <head>
+    <title>
+      Test that ensures beforeunload is fired when session-history-in-parent is enabled
+    </title>
+    <script src="/tests/SimpleTest/SimpleTest.js"></script>
+    <link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
+  </head>
+  <script>
+    SimpleTest.waitForExplicitFinish();
+
+    /*
+     * This test ensures beforeunload is fired on the current page
+     * when it is entering BFCache, and the next page is not coming out
+     * from BFCache, but coming from session history.
+     *
+     * (1) The controller page opens a new window, and page A is loaded there.
+     * (2) Page A then navigates to page B, and a beforeunload event
+     *     listener is registered on page B.
+     * (3) Page B then navigates back to page A, and the beforeunload handler
+     *     should send a message to the controller page.
+     * (4) Page A then navigates back to page B to check if page B has
+     *     been successfully added to BFCache.
+     */
+
+    var bc = new BroadcastChannel("ship_beforeunload");
+    var pageshowCount = 0;
+
+    var beforeUnloadFired = false;
+    bc.onmessage = function(event) {
+      if (event.data.type == "pageshow") {
+        ++pageshowCount;
+        if (pageshowCount == 1) {
+          bc.postMessage({action: "navigate_to_page_b", blockBFCache: true});
+        } else if (pageshowCount == 2) {
+          ok(!event.data.persisted, "?page B shouldn't in BFCache because it's the first navigation");
+          bc.postMessage({action: "register_beforeunload",
+          loadNextPageFromSessionHistory: true});
+        } else if (pageshowCount == 3) {
+          ok(!event.data.persisted, "navigated back to page A that was session history but not in BFCache");
+          ok(beforeUnloadFired, "beforeUnload should be fired on page B");
+          bc.postMessage({action: "back_to_page_b", forwardNavigateToPageB: true});
+        } else if (pageshowCount == 4) {
+          ok(event.data.persisted, "page B has been successfully added to BFCache");
+          bc.postMessage({action: "close"});
+          SimpleTest.finish();
+        }
+      } else if (event.data == "beforeunload_fired") {
+        beforeUnloadFired = true;
+      }
+    }
+
+    function runTest() {
+      SpecialPowers.pushPrefEnv({"set": [
+          ["fission.bfcacheInParent", true],
+          ["docshell.shistory.bfcache.ship_allow_beforeunload_listeners", true]
+        ]},
+        function() {
+          window.open("file_ship_beforeunload_fired.html", "", "noopener");
+        }
+      );
+    }
+  </script>
+  <body onload="runTest()"></body>
+</html>
diff --git a/docshell/test/navigation/test_sibling-matching-parent.html b/docshell/test/navigation/test_sibling-matching-parent.html
new file mode 100644
index 0000000000..3c1bc768db
--- /dev/null
+++ b/docshell/test/navigation/test_sibling-matching-parent.html
@@ -0,0 +1,46 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <script src="/tests/SimpleTest/SimpleTest.js"></script>
+    <script src="/tests/SimpleTest/EventUtils.js"></script>
+    <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+    <script type="text/javascript" src="NavigationUtils.js"></script>
+    <style type="text/css">
+      iframe { width: 90%; height: 50px; }
+    </style>
+<script>
+window.onload = async function() {
+  document.getElementById("active").innerHTML =
+      '<iframe src="navigate.html#parent.frames[0],location"></iframe>' +
+      '<iframe src="navigate.html#child1,open"></iframe>' +
+      '<iframe src="navigate.html#child2,form"></iframe>' +
+      '<iframe src="navigate.html#child3,hyperlink"></iframe>';
+
+  await waitForFinishedFrames(4);
+
+  await isNavigated(frames[0], "Should be able to navigate sibling with on-domain parent by setting location.");
+  await isNavigated(frames[1], "Should be able to navigate sibling with on-domain parent by calling window.open.");
+  await isNavigated(frames[2], "Should be able to navigate sibling with on-domain parent by submitting form.");
+  await isNavigated(frames[3], "Should be able to navigate sibling with on-domain parent by targeted hyperlink.");
+
+  await cleanupWindows();
+  SimpleTest.finish();
+};
+</script>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=408052">Mozilla Bug 408052</a>
+<div id="frames">
+<iframe name="child0" src="http://test1.example.org:80/tests/docshell/test/navigation/blank.html"></iframe>
+<iframe name="child1" src="http://test1.example.org:80/tests/docshell/test/navigation/blank.html"></iframe>
+<iframe name="child2" src="http://test1.example.org:80/tests/docshell/test/navigation/blank.html"></iframe>
+<iframe name="child3" src="http://test1.example.org:80/tests/docshell/test/navigation/blank.html"></iframe>
+</div>
+<div id="active"></div>
+<pre id="test">
+<script type="text/javascript">
+SimpleTest.waitForExplicitFinish();
+</script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_sibling-off-domain.html b/docshell/test/navigation/test_sibling-off-domain.html
new file mode 100644
index 0000000000..cd70d1ae91
--- /dev/null
+++ b/docshell/test/navigation/test_sibling-off-domain.html
@@ -0,0 +1,46 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <script src="/tests/SimpleTest/SimpleTest.js"></script>
+    <script src="/tests/SimpleTest/EventUtils.js"></script>
+    <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+    <script type="text/javascript" src="NavigationUtils.js"></script>
+    <style type="text/css">
+      iframe { width: 90%; height: 50px; }
+    </style>
+<script>
+window.onload = async function() {
+  document.getElementById("active").innerHTML =
+      '<iframe src="http://test1.example.org:80/tests/docshell/test/navigation/navigate.html#parent.frames[0],location"></iframe>' +
+      '<iframe src="http://test1.example.org:80/tests/docshell/test/navigation/navigate.html#child1,open"></iframe>' +
+      '<iframe src="http://test1.example.org:80/tests/docshell/test/navigation/navigate.html#child2,form"></iframe>' +
+      '<iframe src="http://test1.example.org:80/tests/docshell/test/navigation/navigate.html#child3,hyperlink"></iframe>';
+
+  await waitForFinishedFrames(4);
+
+  isBlank(frames[0], "Should not be able to navigate off-domain sibling by setting location.");
+  isBlank(frames[1], "Should not be able to navigate off-domain sibling by calling window.open.");
+  isBlank(frames[2], "Should not be able to navigate off-domain sibling by submitting form.");
+  isBlank(frames[3], "Should not be able to navigate off-domain sibling by targeted hyperlink.");
+
+  await cleanupWindows();
+  SimpleTest.finish();
+};
+</script>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=408052">Mozilla Bug 408052</a>
+<div id="frames">
+<iframe name="child0" src="blank.html"></iframe>
+<iframe name="child1" src="blank.html"></iframe>
+<iframe name="child2" src="blank.html"></iframe>
+<iframe name="child3" src="blank.html"></iframe>
+</div>
+<div id="active"></div>
+<pre id="test">
+<script type="text/javascript">
+SimpleTest.waitForExplicitFinish();
+</script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_state_size.html b/docshell/test/navigation/test_state_size.html
new file mode 100644
index 0000000000..f089a460ec
--- /dev/null
+++ b/docshell/test/navigation/test_state_size.html
@@ -0,0 +1,32 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Test the max size of the data parameter of push/replaceState</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
+  <script>
+    SimpleTest.waitForExplicitFinish();
+    function test() {
+      let tooLarge = SpecialPowers.getIntPref("browser.history.maxStateObjectSize");
+      let allowed = Math.floor(tooLarge / 2);
+
+      history.pushState(new Array(allowed).join("a"), "");
+      ok(true, "Adding a state should succeed.");
+
+      try {
+        history.pushState(new Array(tooLarge).join("a"), "");
+        ok(false, "Adding a too large state object should fail.");
+      } catch(ex) {
+        ok(true, "Adding a too large state object should fail.");
+      }
+      SimpleTest.finish();
+    }
+  </script>
+</head>
+<body onload="test()">
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+<pre id="test"></pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_static_and_dynamic.html b/docshell/test/navigation/test_static_and_dynamic.html
new file mode 100644
index 0000000000..ff72a8188c
--- /dev/null
+++ b/docshell/test/navigation/test_static_and_dynamic.html
@@ -0,0 +1,36 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=
+-->
+<head>
+  <title>Test for static and dynamic frames and forward-back </title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body onload="runTest()">
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=">Mozilla Bug </a>
+<p id="display"></p>
+<div id="content" style="display: none">
+
+</div>
+<pre id="test">
+  <script type="application/javascript">
+    var testCount = 0; // Used by the test files.
+
+    SimpleTest.waitForExplicitFinish();
+
+    var testWindow;
+    function runTest() {
+      testWindow = window.open("file_static_and_dynamic_1.html", "", "width=360,height=480");
+      testWindow.onunload = function() { }; // to prevent bfcache
+    }
+
+    function finishTest() {
+      testWindow.close();
+      SimpleTest.finish();
+    }
+  </script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_triggeringprincipal_frame_nav.html b/docshell/test/navigation/test_triggeringprincipal_frame_nav.html
new file mode 100644
index 0000000000..d7046e9236
--- /dev/null
+++ b/docshell/test/navigation/test_triggeringprincipal_frame_nav.html
@@ -0,0 +1,74 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Bug 1181370 - Test triggeringPrincipal for iframe navigations</title>
+  <!-- Including SimpleTest.js so we can use waitForExplicitFinish !-->
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<iframe style="width:100%;" id="testframe1"></iframe>
+<iframe style="width:100%;" id="testframe2"></iframe>
+
+<script class="testbody" type="text/javascript">
+
+/* Description of the test:
+ *
+ * +------------------------------------+
+ * |  +----------+   +--------------+   |
+ * |  | Frame 1  |   | Frame 2      |   |
+ * |  +----------+   |              |   |
+ * |                 | +----------+ |   |
+ * |                 | | Subframe | |   |
+ * |                 | +----------+ |   |
+ * |                 +--------------+   |
+ * +------------------------------------+
+ *
+ * Frame1:   test1.mochi.test
+ * Frame2:   test2.mochi.test
+ * Subframe: test2.mochi.test
+ *
+ * (*) Frame1 and Subframe set their document.domain to mochi.test
+ * (*) Frame1 navigates the Subframe
+ * (*) TriggeringPrincipal for the Subframe navigation should be
+ *     ==> test1.mochi.test
+ * (*) LoadingPrincipal for the Subframe navigation should be
+ *     ==> test2.mochi.test
+ */
+
+// eslint-disable-next-line @microsoft/sdl/no-insecure-url
+const BASEDOMAIN1 = "http://test1.mochi.test:8888/";
+// eslint-disable-next-line @microsoft/sdl/no-insecure-url
+const BASEDOMAIN2 = "http://test2.mochi.test:8888/";
+const PATH = "tests/docshell/test/navigation/";
+const BASEURL1 = BASEDOMAIN1 + PATH;
+const BASEURL2 = BASEDOMAIN2 + PATH;
+const TRIGGERINGPRINCIPALURI = BASEURL1 + "file_triggeringprincipal_frame_1.html";
+const LOADINGPRINCIPALURI = BASEURL2 + "file_triggeringprincipal_frame_2.html";
+
+SimpleTest.waitForExplicitFinish();
+
+window.addEventListener("message", receiveMessage);
+
+function receiveMessage(event) {
+  is(event.data.triggeringPrincipalURI, TRIGGERINGPRINCIPALURI,
+     "TriggeringPrincipal should be the navigating iframe (Frame 1)");
+  is(event.data.loadingPrincipalURI, LOADINGPRINCIPALURI,
+     "LoadingPrincipal should be the enclosing iframe (Frame 2)");
+  is(event.data.referrerURI, BASEDOMAIN1,
+     "The path of Referrer should be trimmed (Frame 1)");
+
+  window.removeEventListener("message", receiveMessage);
+  SimpleTest.finish();
+}
+
+var frame1 = document.getElementById("testframe1");
+frame1.src = BASEURL1 + "file_triggeringprincipal_frame_1.html";
+
+var frame2 = document.getElementById("testframe2");
+frame2.src = BASEURL2 + "file_triggeringprincipal_frame_2.html";
+
+</script>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_triggeringprincipal_frame_same_origin_nav.html b/docshell/test/navigation/test_triggeringprincipal_frame_same_origin_nav.html
new file mode 100644
index 0000000000..4483efb13e
--- /dev/null
+++ b/docshell/test/navigation/test_triggeringprincipal_frame_same_origin_nav.html
@@ -0,0 +1,63 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Bug 1639195 - Test triggeringPrincipal for iframe same-origin navigations</title>
+  <!-- Including SimpleTest.js so we can use waitForExplicitFinish !-->
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<iframe style="width:100%;" id="testframe" src="http://example.com/"></iframe>
+
+<script type="text/javascript">
+/* We load an third-party iframe which then gets navigated by the iframe's
+ * parent by calling iframe.setAttribute("src", same-origin url) later in the
+ * test. We then verify the TriggeringPrincipal and LoadingPrincipal of the
+ * navigated iframe.
+ *
+ * +------------------------------------------+
+ * |                                          |
+ * |  +------------------+                    |
+ * |  | testframe        |                    |
+ * |  +------------------+                    |
+ * |                                          |
+ * | iframe.setAttribute("src",               |
+ * |                     same-origin url)     |
+ * |                                          |
+ * +------------------------------------------+
+ */
+
+var testframe = document.getElementById("testframe");
+
+window.addEventListener("message", receiveMessage);
+
+const TRIGGERING_PRINCIPAL_URI =
+  "http://mochi.test:8888/tests/docshell/test/navigation/test_triggeringprincipal_frame_same_origin_nav.html";
+
+const LOADING_PRINCIPAL_URI = TRIGGERING_PRINCIPAL_URI;
+
+function receiveMessage(event) {
+  is(event.data.triggeringPrincipalURI.split("?")[0], TRIGGERING_PRINCIPAL_URI,
+     "TriggeringPrincipal should be the parent iframe");
+  is(event.data.loadingPrincipalURI.split("?")[0], TRIGGERING_PRINCIPAL_URI,
+     "LoadingPrincipal should be the parent iframe");
+
+  window.removeEventListener("message", receiveMessage);
+  SimpleTest.finish();
+}
+
+function performNavigation() {
+  testframe.removeEventListener("load", performNavigation);
+  // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+  testframe.setAttribute("src", "http://example.com/tests/docshell/test/navigation/file_triggeringprincipal_subframe_same_origin_nav.html");
+}
+
+// start the test
+SimpleTest.waitForExplicitFinish();
+
+testframe.addEventListener("load", performNavigation);
+</script>
+
+</body>
+</html>
diff --git a/docshell/test/navigation/test_triggeringprincipal_iframe_iframe_window_open.html b/docshell/test/navigation/test_triggeringprincipal_iframe_iframe_window_open.html
new file mode 100644
index 0000000000..115c5f4462
--- /dev/null
+++ b/docshell/test/navigation/test_triggeringprincipal_iframe_iframe_window_open.html
@@ -0,0 +1,87 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>        
+  <script src="/tests/SimpleTest/EventUtils.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+  <script type="text/javascript" src="NavigationUtils.js"></script>        
+</head>
+<body>
+
+<iframe name="framea" id="framea" src="file_triggeringprincipal_iframe_iframe_window_open_frame_a.html"></iframe>
+<iframe name="frameb" id="frameb"></iframe>
+
+<script type="text/javascript">
+
+/* We load an iframe (Frame A) which then gets navigated by another iframe (Frame B)
+ * by calling window.open("http://", "Frame A") later in the test. We then verify the
+ * TriggeringPrincipal and LoadingPrincipal of the navigated iframe (Frame A).
+ *
+ * +---------------------------------------+
+ * |   Parent                              |
+ * |                                       |
+ * |  +----------------------------+       |
+ * |  | Frame A                    |       |
+ * |  |                            |       |
+ * |  |                            |       |
+ * |  +----------------------------+       |
+ * |                                       |
+ * |  +----------------------------+       |
+ * |  | Frame B                    |       |
+ * |  |                            |       |
+ * |  | win.open("http://", "A")   |       |
+ * |  +----------------------------+       |
+ * |                                       |
+ * +---------------------------------------+
+ *
+ * Sequence of the test:
+ *   [1] load Frame A
+ *   [2] load Frame B which navigates A
+ *   [3] load navigated Frame A and check triggeringPrincipal and loadingPrincipal
+ */
+
+const TRIGGERING_PRINCIPAL_URI =
+  "http://mochi.test:8888/tests/docshell/test/navigation/file_triggeringprincipal_iframe_iframe_window_open_frame_b.html";
+
+const LOADING_PRINCIPAL_URI =
+  "http://mochi.test:8888/tests/docshell/test/navigation/test_triggeringprincipal_iframe_iframe_window_open.html";
+
+var frameA = document.getElementById("framea");
+
+function checkResults() {
+  frameA.removeEventListener("load", checkResults);
+
+  var channel = SpecialPowers.wrap(frameA.contentWindow).docShell.currentDocumentChannel;
+  var triggeringPrincipal = channel.loadInfo.triggeringPrincipal.asciiSpec;
+  var loadingPrincipal = channel.loadInfo.loadingPrincipal.asciiSpec;
+
+  is(triggeringPrincipal, TRIGGERING_PRINCIPAL_URI,
+    "TriggeringPrincipal for targeted window.open() should be the iframe triggering the load");
+
+  is(frameA.contentDocument.referrer, TRIGGERING_PRINCIPAL_URI,
+    "Referrer for targeted window.open() should be the principal of the iframe triggering the load");
+
+  is(loadingPrincipal.split("?")[0], LOADING_PRINCIPAL_URI,
+    "LoadingPrincipal for targeted window.open() should be the containing document");
+
+  SimpleTest.finish();
+}
+
+function performNavigation() {
+  frameA.removeEventListener("load", performNavigation);
+  frameA.addEventListener("load", checkResults);
+
+  // load Frame B which then navigates Frame A
+  var frameB = document.getElementById("frameb");
+  frameB.src = "file_triggeringprincipal_iframe_iframe_window_open_frame_b.html";
+}
+
+// start the test
+SimpleTest.waitForExplicitFinish();
+
+frameA.addEventListener("load", performNavigation);
+
+</script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_triggeringprincipal_parent_iframe_window_open.html b/docshell/test/navigation/test_triggeringprincipal_parent_iframe_window_open.html
new file mode 100644
index 0000000000..1611ebf479
--- /dev/null
+++ b/docshell/test/navigation/test_triggeringprincipal_parent_iframe_window_open.html
@@ -0,0 +1,70 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>        
+  <script src="/tests/SimpleTest/EventUtils.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+  <script type="text/javascript" src="NavigationUtils.js"></script>        
+</head>
+<body>
+
+<iframe name="testframe" id="testframe" src="file_triggeringprincipal_iframe_iframe_window_open_base.html"></iframe>
+
+<script type="text/javascript">
+
+/* We load an iframe which then gets navigated by the iframe's parent by calling
+ *  window.open("http://", iframe) later in the test. We then verify the
+ * TriggeringPrincipal and LoadingPrincipal of the navigated iframe.
+ *
+ * +------------------------------------------+
+ * |                                          |
+ * |  +------------------+                    |
+ * |  | testframe        |                    |
+ * |  +------------------+                    |
+ * |                                          |
+ * | window.open("http://", "testframe");     |
+ * |                                          |
+ * +------------------------------------------+
+ */
+
+const TRIGGERING_PRINCIPAL_URI =
+  "http://mochi.test:8888/tests/docshell/test/navigation/test_triggeringprincipal_parent_iframe_window_open.html";
+
+const LOADING_PRINCIPAL_URI = TRIGGERING_PRINCIPAL_URI;
+
+var testframe = document.getElementById("testframe");
+
+function checkResults() {
+  testframe.removeEventListener("load", checkResults);
+
+  var channel = SpecialPowers.wrap(testframe.contentWindow).docShell.currentDocumentChannel;
+  var triggeringPrincipal = channel.loadInfo.triggeringPrincipal.asciiSpec.split("?")[0];
+  var loadingPrincipal = channel.loadInfo.loadingPrincipal.asciiSpec.split("?")[0];
+
+  is(triggeringPrincipal, TRIGGERING_PRINCIPAL_URI,
+    "TriggeringPrincipal for targeted window.open() should be the principal of the document");
+
+  is(testframe.contentDocument.referrer.split("?")[0], TRIGGERING_PRINCIPAL_URI,
+    "Referrer for targeted window.open() should be the principal of the document");
+
+  is(loadingPrincipal, LOADING_PRINCIPAL_URI,
+    "LoadingPrincipal for targeted window.open() should be the <iframe>.ownerDocument");
+
+  SimpleTest.finish();
+}
+
+function performNavigation() {
+  testframe.removeEventListener("load", performNavigation);
+  testframe.addEventListener("load", checkResults);
+  window.open("file_triggeringprincipal_parent_iframe_window_open_nav.html", "testframe");
+}
+
+// start the test
+SimpleTest.waitForExplicitFinish();
+
+testframe.addEventListener("load", performNavigation);
+
+</script>
+</pre>
+</body>
+</html>
diff --git a/docshell/test/navigation/test_triggeringprincipal_window_open.html b/docshell/test/navigation/test_triggeringprincipal_window_open.html
new file mode 100644
index 0000000000..439a125f97
--- /dev/null
+++ b/docshell/test/navigation/test_triggeringprincipal_window_open.html
@@ -0,0 +1,79 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>        
+  <script src="/tests/SimpleTest/EventUtils.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+  <script type="text/javascript" src="NavigationUtils.js"></script>        
+</head>
+<body>
+
+<script type="text/javascript">
+
+/* We call window.open() using different URIs and make sure the triggeringPrincipal
+ * loadingPrincipal are correct.
+ * Test1: window.open(http:)
+ * Test2: window.open(javascript:)
+ */
+
+const TRIGGERING_PRINCIPAL_URI =
+  "http://mochi.test:8888/tests/docshell/test/navigation/test_triggeringprincipal_window_open.html";
+
+SimpleTest.waitForExplicitFinish();
+
+const NUM_TESTS = 2;
+var test_counter = 0;
+
+function checkFinish() {
+  test_counter++;
+  if (test_counter === NUM_TESTS) {
+    SimpleTest.finish();
+  }
+}
+
+// ----------------------------------------------------------------------------
+// Test 1: window.open(http:)
+var httpWin = window.open("file_triggeringprincipal_window_open.html", "_blank", "width=10,height=10");
+httpWin.onload = function() {
+  var httpChannel = SpecialPowers.wrap(httpWin).docShell.currentDocumentChannel;
+  var httpTriggeringPrincipal = httpChannel.loadInfo.triggeringPrincipal.asciiSpec;
+  var httpLoadingPrincipal = httpChannel.loadInfo.loadingPrincipal;
+
+  is(httpTriggeringPrincipal.split("?")[0], TRIGGERING_PRINCIPAL_URI,
+     "TriggeringPrincipal for window.open(http:) should be the principal of the document");
+
+  is(httpWin.document.referrer.split("?")[0], TRIGGERING_PRINCIPAL_URI,
+     "Referrer for window.open(http:) should be the principal of the document");
+
+  is(httpLoadingPrincipal, null,
+     "LoadingPrincipal for window.open(http:) should be null");
+
+  httpWin.close();
+  checkFinish();
+};
+
+// ----------------------------------------------------------------------------
+// Test 2: window.open(javascript:)
+var jsWin = window.open("javascript:'<html><body>js</body></html>';", "_blank", "width=10,height=10");
+jsWin.onload = function() {
+  var jsChannel = SpecialPowers.wrap(jsWin).docShell.currentDocumentChannel;
+  var jsTriggeringPrincipal = jsChannel.loadInfo.triggeringPrincipal.asciiSpec;
+  var jsLoadingPrincipal = jsChannel.loadInfo.loadingPrincipal;
+
+  is(jsTriggeringPrincipal.split("?")[0], TRIGGERING_PRINCIPAL_URI,
+     "TriggeringPrincipal for window.open(javascript:) should be the principal of the document");
+
+  is(jsWin.document.referrer, "",
+     "Referrer for window.open(javascript:) should be empty");
+
+  is(jsLoadingPrincipal, null,
+     "LoadingPrincipal for window.open(javascript:) should be null");
+
+  jsWin.close();
+  checkFinish();
+};
+
+</script>
+</pre>
+</body>
+</html>