diff --git a/browser/base/content/test/general/browser_backButtonFitts.js b/browser/base/content/test/general/browser_backButtonFitts.js
index 5b08eb360139..996a155a79ba 100644
--- a/browser/base/content/test/general/browser_backButtonFitts.js
+++ b/browser/base/content/test/general/browser_backButtonFitts.js
@@ -22,7 +22,8 @@ add_task(async function() {
 
   let popStatePromise = BrowserTestUtils.waitForContentEvent(
     gBrowser.selectedBrowser,
-    "popstate"
+    "popstate",
+    true
   );
   EventUtils.synthesizeMouseAtPoint(xPixel, yPixel, {}, window);
   await popStatePromise;
diff --git a/browser/components/sessionstore/test/browser_async_duplicate_tab.js b/browser/components/sessionstore/test/browser_async_duplicate_tab.js
index 3c57c1432742..3cf041ced599 100644
--- a/browser/components/sessionstore/test/browser_async_duplicate_tab.js
+++ b/browser/components/sessionstore/test/browser_async_duplicate_tab.js
@@ -21,7 +21,7 @@ add_task(async function test_duplicate() {
       docShell.chromeEventHandler.addEventListener(
         "hashchange",
         () => resolve(),
-        { once: true }
+        { once: true, capture: true }
       );
 
       // Click the link.
@@ -60,7 +60,7 @@ add_task(async function test_duplicate_remove() {
       docShell.chromeEventHandler.addEventListener(
         "hashchange",
         () => resolve(),
-        { once: true }
+        { once: true, capture: true }
       );
 
       // Click the link.
diff --git a/browser/components/sessionstore/test/browser_async_flushes.js b/browser/components/sessionstore/test/browser_async_flushes.js
index 584cc092f61f..ad3b27ed4e33 100644
--- a/browser/components/sessionstore/test/browser_async_flushes.js
+++ b/browser/components/sessionstore/test/browser_async_flushes.js
@@ -25,7 +25,7 @@ add_task(async function test_flush() {
       docShell.chromeEventHandler.addEventListener(
         "hashchange",
         () => resolve(),
-        { once: true }
+        { once: true, capture: true }
       );
 
       // Click the link.
@@ -64,7 +64,7 @@ add_task(async function test_crash() {
       docShell.chromeEventHandler.addEventListener(
         "hashchange",
         () => resolve(),
-        { once: true }
+        { once: true, capture: true }
       );
 
       // Click the link.
@@ -107,7 +107,7 @@ add_task(async function test_remove() {
       docShell.chromeEventHandler.addEventListener(
         "hashchange",
         () => resolve(),
-        { once: true }
+        { once: true, capture: true }
       );
 
       // Click the link.
diff --git a/browser/components/sessionstore/test/content.js b/browser/components/sessionstore/test/content.js
index c77427c9441c..67fa53e7b3b1 100644
--- a/browser/components/sessionstore/test/content.js
+++ b/browser/components/sessionstore/test/content.js
@@ -48,9 +48,13 @@ if (sessionHistory) {
  * to modify and query docShell data when running with multiple processes.
  */
 
-addEventListener("hashchange", function() {
-  sendAsyncMessage("ss-test:hashchange");
-});
+addEventListener(
+  "hashchange",
+  function() {
+    sendAsyncMessage("ss-test:hashchange");
+  },
+  true
+);
 
 addMessageListener("ss-test:getStyleSheets", function(msg) {
   let sheets = content.document.styleSheets;
diff --git a/browser/components/urlbar/tests/browser/browser_switchToTabHavingURI_aOpenParams.js b/browser/components/urlbar/tests/browser/browser_switchToTabHavingURI_aOpenParams.js
index aa6360163973..6f9722776b75 100644
--- a/browser/components/urlbar/tests/browser/browser_switchToTabHavingURI_aOpenParams.js
+++ b/browser/components/urlbar/tests/browser/browser_switchToTabHavingURI_aOpenParams.js
@@ -17,7 +17,7 @@ add_task(async function test_ignoreFragment() {
     tabRefAboutHome.linkedBrowser,
     [],
     async function() {
-      await ContentTaskUtils.waitForEvent(this, "hashchange", false);
+      await ContentTaskUtils.waitForEvent(this, "hashchange", true);
     }
   );
   switchTab("about:home#2", true, {
diff --git a/docshell/test/mochitest/test_bug385434.html b/docshell/test/mochitest/test_bug385434.html
index dc7c511749e7..8c3ea4a266d9 100644
--- a/docshell/test/mochitest/test_bug385434.html
+++ b/docshell/test/mochitest/test_bug385434.html
@@ -186,8 +186,8 @@ function* run_test() {
      "Event type should be 'hashchange'.");
   is(gSampleEvent.cancelable, false,
      "The hashchange event shouldn't be cancelable.");
-  is(gSampleEvent.bubbles, true,
-     "The hashchange event should bubble.");
+  is(gSampleEvent.bubbles, false,
+     "The hashchange event should not bubble.");
 
   /*
    * TEST 3 tests that:
diff --git a/dom/base/nsGlobalWindowInner.cpp b/dom/base/nsGlobalWindowInner.cpp
index 2a8ba106b695..d17fcecb210b 100644
--- a/dom/base/nsGlobalWindowInner.cpp
+++ b/dom/base/nsGlobalWindowInner.cpp
@@ -4243,8 +4243,6 @@ nsresult nsGlobalWindowInner::FireHashchange(const nsAString& aOldURL,
   NS_ENSURE_STATE(IsCurrentInnerWindow());
 
   HashChangeEventInit init;
-  init.mBubbles = true;
-  init.mCancelable = false;
   init.mNewURL = aNewURL;
   init.mOldURL = aOldURL;
 
@@ -4284,8 +4282,6 @@ nsresult nsGlobalWindowInner::DispatchSyncPopState() {
   NS_ENSURE_TRUE(result, NS_ERROR_FAILURE);
 
   RootedDictionary<PopStateEventInit> init(cx);
-  init.mBubbles = true;
-  init.mCancelable = false;
   init.mState = stateJSValue;
 
   RefPtr<PopStateEvent> event =
diff --git a/testing/web-platform/meta/html/browsers/browsing-the-web/history-traversal/hashchange_event.html.ini b/testing/web-platform/meta/html/browsers/browsing-the-web/history-traversal/hashchange_event.html.ini
deleted file mode 100644
index 50074f691ea7..000000000000
--- a/testing/web-platform/meta/html/browsers/browsing-the-web/history-traversal/hashchange_event.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[hashchange_event.html]
-  [Queue a task to fire hashchange event]
-    expected: FAIL
-
diff --git a/testing/web-platform/meta/html/browsers/browsing-the-web/history-traversal/popstate_event.html.ini b/testing/web-platform/meta/html/browsers/browsing-the-web/history-traversal/popstate_event.html.ini
deleted file mode 100644
index 7124dbe254fe..000000000000
--- a/testing/web-platform/meta/html/browsers/browsing-the-web/history-traversal/popstate_event.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[popstate_event.html]
-  [Queue a task to fire popstate event]
-    expected: FAIL
-
diff --git a/testing/web-platform/meta/html/browsers/browsing-the-web/scroll-to-fragid/004.html.ini b/testing/web-platform/meta/html/browsers/browsing-the-web/scroll-to-fragid/004.html.ini
deleted file mode 100644
index 90b9dc9074bf..000000000000
--- a/testing/web-platform/meta/html/browsers/browsing-the-web/scroll-to-fragid/004.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[004.html]
-  [Fragment Navigation: hashchange event]
-    expected: FAIL
-