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

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 dom/xul/test/398289-resource.xhtml                 |  49 ++++++++++
 dom/xul/test/chrome.toml                           |  42 ++++++++
 dom/xul/test/file_bug236853.rdf                    |  14 +++
 dom/xul/test/mochitest.toml                        |   3 +
 dom/xul/test/test_accesskey.xhtml                  |  57 +++++++++++
 .../test/test_bug1070049_throw_from_script.xhtml   |  40 ++++++++
 dom/xul/test/test_bug1290965.xhtml                 |  38 ++++++++
 dom/xul/test/test_bug1686822.xhtml                 |  35 +++++++
 dom/xul/test/test_bug199692.xhtml                  | 102 ++++++++++++++++++++
 dom/xul/test/test_bug311681.xhtml                  | 107 +++++++++++++++++++++
 dom/xul/test/test_bug391002.xhtml                  |  41 ++++++++
 dom/xul/test/test_bug398289.html                   |  41 ++++++++
 dom/xul/test/test_bug403868.xhtml                  |  83 ++++++++++++++++
 dom/xul/test/test_bug418216.xhtml                  |  46 +++++++++
 dom/xul/test/test_bug445177.xhtml                  |  66 +++++++++++++
 dom/xul/test/test_bug468176.xhtml                  |  84 ++++++++++++++++
 dom/xul/test/test_bug583948.xhtml                  |  41 ++++++++
 dom/xul/test/test_bug749367.xhtml                  |  39 ++++++++
 dom/xul/test/test_bug775972.xhtml                  |  35 +++++++
 dom/xul/test/test_disable_scroll_frame_plain.html  |  19 ++++
 dom/xul/test/test_html_template.xhtml              |  18 ++++
 dom/xul/test/test_import_xul_to_content.xhtml      |  68 +++++++++++++
 dom/xul/test/test_xul_tabindex_focus.xhtml         |  44 +++++++++
 dom/xul/test/window_bug1686822.xhtml               |   7 ++
 dom/xul/test/window_bug583948.xhtml                |   8 ++
 25 files changed, 1127 insertions(+)
 create mode 100644 dom/xul/test/398289-resource.xhtml
 create mode 100644 dom/xul/test/chrome.toml
 create mode 100644 dom/xul/test/file_bug236853.rdf
 create mode 100644 dom/xul/test/mochitest.toml
 create mode 100644 dom/xul/test/test_accesskey.xhtml
 create mode 100644 dom/xul/test/test_bug1070049_throw_from_script.xhtml
 create mode 100644 dom/xul/test/test_bug1290965.xhtml
 create mode 100644 dom/xul/test/test_bug1686822.xhtml
 create mode 100644 dom/xul/test/test_bug199692.xhtml
 create mode 100644 dom/xul/test/test_bug311681.xhtml
 create mode 100644 dom/xul/test/test_bug391002.xhtml
 create mode 100644 dom/xul/test/test_bug398289.html
 create mode 100644 dom/xul/test/test_bug403868.xhtml
 create mode 100644 dom/xul/test/test_bug418216.xhtml
 create mode 100644 dom/xul/test/test_bug445177.xhtml
 create mode 100644 dom/xul/test/test_bug468176.xhtml
 create mode 100644 dom/xul/test/test_bug583948.xhtml
 create mode 100644 dom/xul/test/test_bug749367.xhtml
 create mode 100644 dom/xul/test/test_bug775972.xhtml
 create mode 100644 dom/xul/test/test_disable_scroll_frame_plain.html
 create mode 100644 dom/xul/test/test_html_template.xhtml
 create mode 100644 dom/xul/test/test_import_xul_to_content.xhtml
 create mode 100644 dom/xul/test/test_xul_tabindex_focus.xhtml
 create mode 100644 dom/xul/test/window_bug1686822.xhtml
 create mode 100644 dom/xul/test/window_bug583948.xhtml

(limited to 'dom/xul/test')

diff --git a/dom/xul/test/398289-resource.xhtml b/dom/xul/test/398289-resource.xhtml
new file mode 100644
index 0000000000..6702027ef1
--- /dev/null
+++ b/dom/xul/test/398289-resource.xhtml
@@ -0,0 +1,49 @@
+<?xml version="1.0"?>
+
+<?xml-stylesheet href="chrome://global/skin/global.css" type="text/css"?>
+
+<window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
+<dialog buttonlabelaccept="OK"
+        buttonlabelcancel="Cancel">
+  <style xmlns="http://www.w3.org/1999/xhtml">
+    .tab-middle { outline: none !important }
+  </style>
+
+  <script>
+    document.addEventListener("dialogaccept", function() { alert('OK') });
+    document.addEventListener("dialogcancel", function() { alert('Cancel') });
+  </script>
+
+  <tabbox id="test" flex="1" persist="selectedIndex">
+
+    <tabs>
+      <tab label="One"/>
+      <tab label="Two"/>
+    </tabs>
+
+    <tabpanels flex="1">
+
+      <vbox flex="1">
+        <description>Text for tab ONE</description>
+        <description class="text-link"
+                     onclick="window.open('https://bugzilla.mozilla.org/show_bug.cgi?id=398289');">(test case for bug 398289)</description>
+        <tree>
+          <treecols>
+            <treecol label="Header" flex="1"/>
+          </treecols>
+        </tree>
+      </vbox>
+
+      <vbox flex="1">
+        <description>Text for tab TWO</description>
+        <description>(When the document is reloaded, this content gets replaced by the one from the first tab.)</description>
+      </vbox>
+
+    </tabpanels>
+
+  </tabbox>
+
+  <box height="1000"/> <!-- Push dialog buttons out of sight so that the animated default button isn't part of the snapshot -->
+
+</dialog>
+</window>
diff --git a/dom/xul/test/chrome.toml b/dom/xul/test/chrome.toml
new file mode 100644
index 0000000000..3e239fe1d9
--- /dev/null
+++ b/dom/xul/test/chrome.toml
@@ -0,0 +1,42 @@
+[DEFAULT]
+support-files = [
+  "398289-resource.xhtml",
+  "window_bug583948.xhtml",
+]
+
+["test_accesskey.xhtml"]
+
+["test_bug199692.xhtml"]
+
+["test_bug311681.xhtml"]
+
+["test_bug391002.xhtml"]
+
+["test_bug398289.html"]
+
+["test_bug403868.xhtml"]
+
+["test_bug418216.xhtml"]
+
+["test_bug445177.xhtml"]
+
+["test_bug468176.xhtml"]
+
+["test_bug583948.xhtml"]
+
+["test_bug749367.xhtml"]
+
+["test_bug775972.xhtml"]
+
+["test_bug1070049_throw_from_script.xhtml"]
+
+["test_bug1290965.xhtml"]
+
+["test_bug1686822.xhtml"]
+support-files = ["window_bug1686822.xhtml"]
+
+["test_html_template.xhtml"]
+
+["test_import_xul_to_content.xhtml"]
+
+["test_xul_tabindex_focus.xhtml"]
diff --git a/dom/xul/test/file_bug236853.rdf b/dom/xul/test/file_bug236853.rdf
new file mode 100644
index 0000000000..8d17bf6912
--- /dev/null
+++ b/dom/xul/test/file_bug236853.rdf
@@ -0,0 +1,14 @@
+<?xml version="1.0"?>
+<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+	xmlns:ex="http://www.ex.org/ex-rdf#">
+
+	<rdf:Description about="urn:root">
+		<ex:nodes>
+			<rdf:Bag about="http://www.ex.org/nodes">
+				<rdf:li>
+					<rdf:Description about="http://www.ex.org/nodes/A"/>
+				</rdf:li>
+			</rdf:Bag>
+		</ex:nodes>
+	</rdf:Description>		
+</rdf:RDF>
diff --git a/dom/xul/test/mochitest.toml b/dom/xul/test/mochitest.toml
new file mode 100644
index 0000000000..70c4690b01
--- /dev/null
+++ b/dom/xul/test/mochitest.toml
@@ -0,0 +1,3 @@
+[DEFAULT]
+
+["test_disable_scroll_frame_plain.html"]
diff --git a/dom/xul/test/test_accesskey.xhtml b/dom/xul/test/test_accesskey.xhtml
new file mode 100644
index 0000000000..c71fcf78a0
--- /dev/null
+++ b/dom/xul/test/test_accesskey.xhtml
@@ -0,0 +1,57 @@
+<?xml version="1.0"?>
+<?xml-stylesheet type="text/css" href="chrome://global/skin"?>
+<?xml-stylesheet href="chrome://mochikit/content/tests/SimpleTest/test.css" type="text/css"?>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=1699284
+-->
+<window title="Mozilla Bug 1699284"
+        xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
+<script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+<script src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"></script>
+<body>
+<label id="label1" accesskey="a">Label 1</label><button id="button1" accesskey="a">Button 1</button>
+<label id="label2" accesskey="a" tabindex="0">Label 2</label><button id="button2">Button 2</button>
+<label id="label3">Label 3</label><button id="button3" accesskey="a">Button 3</button>
+<label id="label4" accesskey="a" control="button4">Label 4</label><button id="button4" disabled="true">Button 4</button>
+<label id="label5" accesskey="a" control="button5">Label 5</label><button id="button5">Button 5</button>
+<!-- Tests code -->
+<script type="application/javascript">
+<![CDATA[
+
+/** Test for Bug 1699284 **/
+
+function PerformAccessKey(aKey) {
+  synthesizeKey(aKey, navigator.platform.includes("Mac") ? { altKey: true, ctrlKey: true }
+                                                         : { altKey: true, shiftKey: true });
+};
+
+add_task(async function test_accesskey() {
+  let [label1, label2, label3, label4, label5] = document.querySelectorAll("label");
+  let [button1, button2, button3, button4, button5] = document.querySelectorAll("button");
+
+  [
+    label1, label2, label3, label4, label5, button1, button2, button3, button4, button5
+  ].forEach(function(ele) {
+    ele.addEventListener("click", function(e) {
+      ok(false, `${e.target.id} should not receive click event`);
+    });
+  });
+
+  PerformAccessKey("a");
+  is(document.activeElement.id, button1.id, `focus should move to ${button1.id}`);
+
+  PerformAccessKey("a");
+  is(document.activeElement.id, button3.id, `focus should move to ${button3.id}`);
+
+  PerformAccessKey("a");
+  is(document.activeElement.id, button5.id, `focus should move to ${button5.id}`);
+
+  // Cycle back to first element
+  PerformAccessKey("a");
+  is(document.activeElement.id, button1.id, `focus should move to ${button1.id}`);
+});
+
+]]>
+</script>
+</body>
+</window>
diff --git a/dom/xul/test/test_bug1070049_throw_from_script.xhtml b/dom/xul/test/test_bug1070049_throw_from_script.xhtml
new file mode 100644
index 0000000000..d5fb83e6ff
--- /dev/null
+++ b/dom/xul/test/test_bug1070049_throw_from_script.xhtml
@@ -0,0 +1,40 @@
+<?xml version="1.0"?>
+<?xml-stylesheet type="text/css" href="chrome://global/skin"?>
+<?xml-stylesheet type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"?>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=1070049
+-->
+<window title="Mozilla Bug 1070049"
+        xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"/>
+
+  <!-- test code goes here -->
+  <script type="application/javascript">
+  <![CDATA[
+
+  /** Test for Bug 1070049 **/
+  SimpleTest.waitForExplicitFinish();
+  addLoadEvent(function() {
+    // Prevent the test from failing when the exception hits onerror.
+    SimpleTest.expectUncaughtException();
+
+    // Tell the test to expect exactly one console error with the given parameters,
+    // with SimpleTest.finish as a continuation function.
+    SimpleTest.monitorConsole(SimpleTest.finish, [{errorMessage: new RegExp('flimfniffle')}]);
+
+    // Schedule the console accounting (and continuation) to run next, right
+    // after we throw (below).
+    SimpleTest.executeSoon(SimpleTest.endMonitorConsole);
+
+    // Throw.
+    throw new Error("flimfniffle");
+  });
+  ]]>
+  </script>
+
+  <!-- test results are displayed in the html:body -->
+  <body xmlns="http://www.w3.org/1999/xhtml">
+  <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=1070049"
+     target="_blank">Mozilla Bug 1070049</a>
+  </body>
+</window>
diff --git a/dom/xul/test/test_bug1290965.xhtml b/dom/xul/test/test_bug1290965.xhtml
new file mode 100644
index 0000000000..dbef1df844
--- /dev/null
+++ b/dom/xul/test/test_bug1290965.xhtml
@@ -0,0 +1,38 @@
+<?xml version="1.0"?>
+<?xml-stylesheet href="chrome://global/skin/global.css" type="text/css"?>
+<window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul" xmlns:html="http://www.w3.org/1999/xhtml">
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js" />
+  <toolbarbutton oncommand="++countera;" id="a">A</toolbarbutton>
+  <toolbarbutton oncommand="++counterb;" id="b">B</toolbarbutton>
+  <script>
+  //<![CDATA[
+    let aEl = document.getElementById('a');
+    let bEl = document.getElementById('b');
+    let countera = 0;
+    let counterb = 0;
+
+    aEl.addEventListener('click', function (aEvent) {
+      aEvent.preventDefault();
+      let cmdEvent = document.createEvent("xulcommandevent");
+      cmdEvent.initCommandEvent("command", true, true, window, 0,
+                                aEvent.ctrlKey, aEvent.altKey, aEvent.shiftKey,
+                                aEvent.metaKey, 0, null, aEvent.inputSource);
+      aEvent.currentTarget.dispatchEvent(cmdEvent);
+    });
+
+    bEl.addEventListener('click', function (aEvent) {
+      let cmdEvent = document.createEvent("xulcommandevent");
+      cmdEvent.initCommandEvent("command", true, true, window, 0,
+                                aEvent.ctrlKey, aEvent.altKey, aEvent.shiftKey,
+                                aEvent.metaKey, 0, null, aEvent.inputSource);
+      aEvent.currentTarget.dispatchEvent(cmdEvent);
+    });
+
+    bEl.click();
+    aEl.click();
+
+    is(countera, 1, "Counter should be one as event fires once");
+    is(counterb, 2, "Counter should be two as event fires twice");
+  //]]>
+  </script>
+</window>
diff --git a/dom/xul/test/test_bug1686822.xhtml b/dom/xul/test/test_bug1686822.xhtml
new file mode 100644
index 0000000000..cdad585d00
--- /dev/null
+++ b/dom/xul/test/test_bug1686822.xhtml
@@ -0,0 +1,35 @@
+<?xml version="1.0"?>
+<?xml-stylesheet href="chrome://global/skin/global.css" type="text/css"?>
+<window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul" xmlns:html="http://www.w3.org/1999/xhtml">
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js" />
+  <html:script><![CDATA[
+    SimpleTest.waitForExplicitFinish();
+    let chromeWindow = browsingContext.topChromeWindow;
+
+    let resolve;
+    let i = 0;
+    chromeWindow.moduleScriptRan = function() {
+      ok(true, "Module script executed: " + ++i)
+      resolve();
+      resolve = null;
+    }
+
+    function testOnce() {
+      let currentWin;
+      return new Promise(r => {
+        currentWin = chromeWindow.open("window_bug1686822.xhtml", "", "chrome");
+        resolve = r;
+      }).then(function() {
+        currentWin.close();
+      });
+    }
+
+    (async function() {
+      // The first and second loads are different so make sure we test both code paths.
+      await testOnce();
+      await testOnce();
+      delete chromeWindow.moduleScriptRan;
+      SimpleTest.finish();
+    }());
+  ]]></html:script>
+</window>
diff --git a/dom/xul/test/test_bug199692.xhtml b/dom/xul/test/test_bug199692.xhtml
new file mode 100644
index 0000000000..6d8b9efe4e
--- /dev/null
+++ b/dom/xul/test/test_bug199692.xhtml
@@ -0,0 +1,102 @@
+<?xml version="1.0"?>
+<?xml-stylesheet href="chrome://global/skin" type="text/css"?>
+<?xml-stylesheet href="chrome://mochikit/content/tests/SimpleTest/test.css" type="text/css"?>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=199692
+-->
+<window title="Test for Bug 199692"
+  id="test_bug199692.xhtml"
+  xmlns:html="http://www.w3.org/1999/xhtml"
+  xmlns:xul="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+  xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="text/javascript">
+  <![CDATA[
+  customElements.define("test-xul-element", class CustomElement extends XULElement {
+    constructor() {
+      super();
+      const template = document.getElementById("template");
+      this.attachShadow({mode: "open"})
+        .appendChild(template.content.cloneNode(true));
+    }
+  });
+  ]]>
+  </script>
+<body id="body" xmlns="http://www.w3.org/1999/xhtml">
+<template id="template">
+  <xul:label id="anon-label" value="ANON"/>
+</template>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=199692">Mozilla Bug 199692</a>
+
+<vbox id="content" style="position: relative;"
+xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
+  <xul:label id="non-anon-label" value="a textbox!:" control="textbox"/>
+  <html:textarea id="textbox" rows="4"/>
+  <xul:radiogroup style="outline: 2px solid orange;">
+    <xul:radio id="unselected-radio" label="Orange" style="outline: 2px solid red;"/>
+    <xul:radio id="selected-radio" label="Violet" selected="true"/>
+    <xul:radio id="disabled-radio" label="Yellow" disabled="true"/>
+  </xul:radiogroup>
+  <test-xul-element id="bound" style="border: 2px solid green;"></test-xul-element>
+</vbox>
+<pre id="test">
+  <script class="testbody" type="text/javascript">
+<![CDATA[
+  SimpleTest.waitForExplicitFinish();
+
+  // Before onload, XUL docs have no root frame.
+  is(document.elementFromPoint(10,10), null,
+     "Calls to elementFromPoint before onload should return null");
+
+  var d = 10;
+  function middle(e) {
+    return { "x": e.getBoundingClientRect().x + e.getBoundingClientRect().width/2,
+             "y": e.getBoundingClientRect().y + e.getBoundingClientRect().height/2 };
+  }
+  function lower_right(e) {
+    return { "x": e.getBoundingClientRect().x + e.getBoundingClientRect().width - d,
+             "y": e.getBoundingClientRect().y + e.getBoundingClientRect().height - d };
+  }
+  function upper_left(e) {
+    return { "x": e.getBoundingClientRect().x + d,
+             "y": e.getBoundingClientRect().y + d };
+  }
+  function scrollbar_button(e) { // a bit down from upper right
+    return { "x": e.getBoundingClientRect().x + e.getBoundingClientRect().width - d,
+             "y": e.getBoundingClientRect().y + d + 15 };
+  }
+
+  function test(ptFunc, id, message) {
+    var pt = ptFunc($(id));
+    var e = document.elementFromPoint(pt.x, pt.y);
+    ok(e != null, message + " (returned null)");
+    is(e.id, id, message);
+  }
+
+  function do_test() {
+    // Avoid hardcoding x,y pixel values, to better deal with differing default
+    // font sizes or other layout defaults.
+
+    test(middle, 'textbox', "Point within textbox should return textbox element");
+    test(lower_right, 'textbox', "Point on textbox's scrollbar should return textbox element");
+    test(scrollbar_button, 'textbox', "Point on textbox's scrollbar button should return textbox element");
+    test(middle, 'non-anon-label', "Point on label should return label");
+    test(upper_left, 'bound', "Point on custom element content should return custom element");
+
+    SimpleTest.finish();
+  }
+  $("textbox").setAttribute("value",
+      "lorem ipsum dolor sit amet " +
+      "lorem ipsum dolor sit amet " +
+      "lorem ipsum dolor sit amet " +
+      "lorem ipsum dolor sit amet " +
+      "lorem ipsum dolor sit amet " +
+      "lorem ipsum dolor sit amet " +
+      "lorem ipsum dolor sit amet "); // force scrollbars to appear
+  addLoadEvent(do_test);
+]]>
+  </script>
+</pre>
+</body>
+</window>
diff --git a/dom/xul/test/test_bug311681.xhtml b/dom/xul/test/test_bug311681.xhtml
new file mode 100644
index 0000000000..8caef2ca5b
--- /dev/null
+++ b/dom/xul/test/test_bug311681.xhtml
@@ -0,0 +1,107 @@
+<?xml version="1.0"?>
+<?xml-stylesheet href="chrome://global/skin" type="text/css"?>
+<?xml-stylesheet href="chrome://mochikit/content/tests/SimpleTest/test.css" type="text/css"?>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=311681
+-->
+<window title="Mozilla Bug 311681"
+  xmlns:html="http://www.w3.org/1999/xhtml"
+  xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>      
+
+<body  xmlns="http://www.w3.org/1999/xhtml">
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=311681">Mozilla Bug 311681</a>
+<script class="testbody" type="text/javascript">
+<![CDATA[
+  // Setup script
+  SimpleTest.waitForExplicitFinish();
+
+  // Make sure to trigger the hashtable case by asking for enough elements
+  // by ID.
+  for (var i = 0; i < 256; ++i) {
+    var x = document.getElementById(i);
+  }
+
+  // save off the document.getElementById function, since getting it as a
+  // property off the document it causes a content flush.      
+  var fun = document.getElementById;
+
+  // Slot for our initial element with id "content"
+  var testNode;
+
+  function getCont() {
+    return fun.call(document, "content");
+  }
+  
+  function testClone() {
+    // Test to make sure that if we have multiple nodes with the same ID in
+    // a document we don't forget about one of them when the other is
+    // removed.
+    var newParent = $("display");
+    var node = testNode.cloneNode(true);
+    isnot(node, testNode, "Clone should be a different node");
+
+    newParent.appendChild(node);
+
+    // Check what getElementById returns, no flushing
+    is(getCont(), node, "Should be getting new node pre-flush 1")
+    
+    // Trigger a layout flush, just in case.
+    let itemHeight = newParent.offsetHeight/10;
+
+    // Check what getElementById returns now.
+    is(getCont(), node, "Should be getting new node post-flush 1")
+    
+    clear(newParent);
+    
+    // Check what getElementById returns, no flushing
+    is(getCont(), testNode, "Should be getting orig node pre-flush 2");
+    
+    // Trigger a layout flush, just in case.
+    itemHeight = newParent.offsetHeight/10;
+
+    // Check what getElementById returns now.
+    is(getCont(), testNode, "Should be getting orig node post-flush 2");
+
+    node = testNode.cloneNode(true);
+    newParent.appendChild(node);
+    testNode.remove();
+
+    // Check what getElementById returns, no flushing
+    is(getCont(), node, "Should be getting clone pre-flush");
+    
+    // Trigger a layout flush, just in case.
+    // eslint-disable-next-line no-unused-vars
+    itemHeight = newParent.offsetHeight/10;
+
+    // Check what getElementById returns now.
+    is(getCont(), node, "Should be getting clone post-flush");
+
+  }
+
+  function clear(node) {
+    while (node.hasChildNodes()) {
+      node.firstChild.remove();
+    }
+  }
+
+  addLoadEvent(testClone);
+  addLoadEvent(SimpleTest.finish);
+]]>
+</script>
+<p id="display"></p>
+<div id="content" style="display: none">
+  <script class="testbody" type="text/javascript">
+  <![CDATA[
+    testNode = fun.call(document, "content");
+    // Needs incremental XML parser
+    isnot(testNode, null, "Should have node here");
+  ]]>
+  </script>  
+</div>
+<pre id="test">
+</pre>
+</body>
+
+</window>
diff --git a/dom/xul/test/test_bug391002.xhtml b/dom/xul/test/test_bug391002.xhtml
new file mode 100644
index 0000000000..da8c8b4d35
--- /dev/null
+++ b/dom/xul/test/test_bug391002.xhtml
@@ -0,0 +1,41 @@
+<?xml version="1.0"?>
+<?xml-stylesheet href="chrome://global/skin" type="text/css"?>
+<?xml-stylesheet href="chrome://mochikit/content/tests/SimpleTest/test.css" type="text/css"?>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=391002
+-->
+<window title="Mozilla Bug 391002"
+  xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"/>
+
+  <!-- test results are displayed in the html:body -->
+  <body xmlns="http://www.w3.org/1999/xhtml">
+  <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=391002"
+     target="_blank">Mozilla Bug 391002</a>
+  </body>
+
+  <button id="btn1" command="cmd1"/>
+
+  <button id="btn2">
+    <observes id="observes" element="cmd1" attribute="label"/>
+  </button>
+
+  <commandset>
+    <command id="cmd1" label="cmd1"/>
+    <command id="cmd2" label="cmd2"/>
+  </commandset>
+
+  <!-- test code goes here -->
+  <script type="application/javascript"><![CDATA[
+
+    /** Test for Bug 391002 **/
+
+    $("btn1").setAttribute("command", "cmd2");
+    is($("btn1").getAttribute("label"), $("cmd2").getAttribute("label"))
+
+    $("observes").setAttribute("element", "cmd2");
+    is($("btn2").getAttribute("label"), $("cmd2").getAttribute("label"))
+
+  ]]></script>
+</window>
+
diff --git a/dom/xul/test/test_bug398289.html b/dom/xul/test/test_bug398289.html
new file mode 100644
index 0000000000..c4873fe2b2
--- /dev/null
+++ b/dom/xul/test/test_bug398289.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<html style="height: 100%">
+<head>
+  <title>Test for bug 398289</title>
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="chrome://mochikit/content/tests/SimpleTest/WindowSnapshot.js"></script>
+  <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+</head>
+<body style="height: 100%; margin: 0; overflow: hidden;" onload="setTimeout(onBodyLoad, 0);">
+  <iframe id="test" style="border: 0; width: 100%; height: 100%" scrolling="no" src="398289-resource.xhtml"></iframe>
+
+  <script class="testbody">
+    var snap1, snap2;
+    SimpleTest.waitForExplicitFinish();
+
+    async function onBodyLoad() {
+      window.frames[0].document.getElementById("test").selectedIndex = 0;
+      window.frames[0].document.getElementById("test").selectedIndex = 1;
+
+      frames[0].scrollTo(0, 0);
+      scrollTo(0, 0);
+      snap1 = await snapshotWindow(window);
+
+      document.getElementById("test").onload = onFrameLoad;
+      window.frames[0].location.reload();
+    }
+
+    async function onFrameLoad() {
+      frames[0].scrollTo(0, 0);
+      scrollTo(0, 0);
+      snap2 = await snapshotWindow(window);
+
+      var equal, str1, str2;
+      [equal, str1, str2] = compareSnapshots(snap1, snap2, true);
+
+      ok(equal, "persistent attribute in tab box broken, expected: "+str1+" got: "+str2);
+      SimpleTest.finish();
+    }
+  </script>
+</body>
+</html>
diff --git a/dom/xul/test/test_bug403868.xhtml b/dom/xul/test/test_bug403868.xhtml
new file mode 100644
index 0000000000..c2427bb644
--- /dev/null
+++ b/dom/xul/test/test_bug403868.xhtml
@@ -0,0 +1,83 @@
+<?xml version="1.0"?>
+<?xml-stylesheet href="chrome://global/skin" type="text/css"?>
+<?xml-stylesheet href="chrome://mochikit/content/tests/SimpleTest/test.css" type="text/css"?>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=403868
+-->
+<window title="Mozilla Bug 403868"
+  xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"/>
+
+  <!-- test results are displayed in the html:body -->
+  <body xmlns="http://www.w3.org/1999/xhtml">
+  <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=403868"
+     target="_blank">Mozilla Bug 403868</a>
+    <div id="content" style="display: none"/>
+  </body>
+
+  <!-- test code goes here -->
+  <script type="application/javascript"><![CDATA[
+
+    /** Test for Bug 403868 **/
+function createSpan(id, insertionPoint) {
+  var s = document.createElementNS("http://www.w3.org/1999/xhtml", "span");
+  s.id = id;
+  $("content").insertBefore(s, insertionPoint);
+  return s;
+}
+
+var s1a = createSpan("test1", null);
+is(document.getElementById("test1"), s1a,
+   "Only one span with id=test1 in the tree; should work!");
+
+var s2a = createSpan("test1", null);
+is(document.getElementById("test1"), s1a,
+   "Appending span with id=test1 doesn't change which one comes first");
+
+var s3a = createSpan("test1", s2a);
+is(document.getElementById("test1"), s1a,
+   "Inserting span with id=test1 not at the beginning; doesn't matter");
+
+var s4a = createSpan("test1", s1a);
+is(document.getElementById("test1"), s4a,
+   "Inserting span with id=test1 at the beginning changes which one is first");
+
+s4a.remove();
+is(document.getElementById("test1"), s1a,
+   "First-created span with id=test1 is first again");
+
+s1a.remove();
+is(document.getElementById("test1"), s3a,
+   "Third-created span with id=test1 is first now");
+
+// Start the id hashtable
+for (var i = 0; i < 256; ++i) {
+  document.getElementById("no-such-id-in-the-document" + i);
+}
+
+var s1b = createSpan("test2", null);
+is(document.getElementById("test2"), s1b,
+   "Only one span with id=test2 in the tree; should work!");
+
+var s2b = createSpan("test2", null);
+is(document.getElementById("test2"), s1b,
+   "Appending span with id=test2 doesn't change which one comes first");
+
+var s3b = createSpan("test2", s2b);
+is(document.getElementById("test2"), s1b,
+   "Inserting span with id=test2 not at the beginning; doesn't matter");
+
+var s4b = createSpan("test2", s1b);
+is(document.getElementById("test2"), s4b,
+   "Inserting span with id=test2 at the beginning changes which one is first");
+
+s4b.remove();
+is(document.getElementById("test2"), s1b,
+   "First-created span with id=test2 is first again");
+
+s1b.remove();
+is(document.getElementById("test2"), s3b,
+   "Third-created span with id=test2 is first now");
+
+  ]]></script>
+</window>
diff --git a/dom/xul/test/test_bug418216.xhtml b/dom/xul/test/test_bug418216.xhtml
new file mode 100644
index 0000000000..56e487faf2
--- /dev/null
+++ b/dom/xul/test/test_bug418216.xhtml
@@ -0,0 +1,46 @@
+<?xml version="1.0"?>
+<?xml-stylesheet href="chrome://global/skin" type="text/css"?>
+<?xml-stylesheet href="chrome://mochikit/content/tests/SimpleTest/test.css" type="text/css"?>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=418216
+-->
+<window title="Mozilla Bug 418216"
+  xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"/>
+
+  <!-- test results are displayed in the html:body -->
+  <body xmlns="http://www.w3.org/1999/xhtml">
+  <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=418216"
+     target="_blank">Mozilla Bug 418216</a>
+  </body>
+
+  <!-- test code goes here -->
+  <script type="application/javascript"><![CDATA[
+
+    /** Test for Bug 418216 **/
+  SimpleTest.waitForExplicitFinish();
+  window.onload = function onload() {
+    var element = $("item");
+    $("container").removeChild($("item"));
+    $("broadcaster").removeAttribute("disabled");
+    $("container").appendChild(element);
+    is($("item").hasAttribute("disabled"), $("broadcaster").hasAttribute("disabled"));
+    SimpleTest.finish();
+  }
+
+
+
+
+  ]]></script>
+
+<box id="container">
+<box id="item">
+    <observes element="broadcaster" attribute="disabled"/>
+</box>
+</box>
+
+<broadcasterset>
+    <broadcaster id="broadcaster" disabled="true"/>
+</broadcasterset>
+
+</window>
diff --git a/dom/xul/test/test_bug445177.xhtml b/dom/xul/test/test_bug445177.xhtml
new file mode 100644
index 0000000000..d188f19241
--- /dev/null
+++ b/dom/xul/test/test_bug445177.xhtml
@@ -0,0 +1,66 @@
+<?xml version="1.0"?>
+<?xml-stylesheet href="chrome://global/skin" type="text/css"?>
+<?xml-stylesheet href="chrome://mochikit/content/tests/SimpleTest/test.css" type="text/css"?>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=445177
+-->
+<window title="Test for Bug 445177"
+  id="test_bug445177.xhtml"
+  xmlns:html="http://www.w3.org/1999/xhtml"
+  xmlns:xul="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+  xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+
+<body id="body" xmlns="http://www.w3.org/1999/xhtml">
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=445177">Mozilla Bug 445177</a>
+
+
+<xul:hbox id="b1" value="foo"/>
+<xul:hbox id="o1" observes="b1"/>
+
+<pre id="test">
+  <script class="testbody" type="text/javascript">
+<![CDATA[
+  SimpleTest.waitForExplicitFinish();
+  function do_test() {
+    var b1 = document.getElementById("b1");
+    var o1 = document.getElementById("o1");
+
+    is(o1.getAttribute("value"), b1.getAttribute("value"), "Wrong value (1)");
+
+    b1.setAttribute("value", "bar");
+    is(o1.getAttribute("value"), b1.getAttribute("value"), "Wrong value (2)");
+
+    b1.removeAttribute("value");
+    is(o1.hasAttribute("value"), b1.hasAttribute("value"), "Wrong value (3)");
+
+    o1.setAttribute("value", "foo");
+    isnot(o1.getAttribute("value"), b1.getAttribute("value"), "Wrong value (4)");
+
+    b1.setAttribute("value", "foobar");
+    is(o1.getAttribute("value"), b1.getAttribute("value"), "Wrong value (5)");
+
+    //After removing listener, changes to broadcaster shouldn't have any effect.
+    o1.remove();
+    b1.setAttribute("value", "foo");
+    isnot(o1.getAttribute("value"), b1.getAttribute("value"), "Wrong value (6)");
+
+    b1.parentNode.appendChild(o1);
+    is(o1.getAttribute("value"), b1.getAttribute("value"), "Wrong value (7)");
+
+    o1.remove();
+    o1.removeAttribute("observes");
+    o1.removeAttribute("value");
+    b1.parentNode.appendChild(o1);
+    isnot(o1.getAttribute("value"), b1.getAttribute("value"), "Wrong value (8)");
+
+    SimpleTest.finish();
+  }
+
+  addLoadEvent(do_test);
+]]>
+  </script>
+</pre>
+</body>
+</window>
diff --git a/dom/xul/test/test_bug468176.xhtml b/dom/xul/test/test_bug468176.xhtml
new file mode 100644
index 0000000000..f21c1bcde3
--- /dev/null
+++ b/dom/xul/test/test_bug468176.xhtml
@@ -0,0 +1,84 @@
+<?xml version="1.0"?>
+<?xml-stylesheet href="chrome://global/skin" type="text/css"?>
+<?xml-stylesheet href="chrome://mochikit/content/tests/SimpleTest/test.css" type="text/css"?>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=468176
+-->
+<window title="Test for Bug 468176"
+  id="test_bug468176.xhtml"
+  xmlns:html="http://www.w3.org/1999/xhtml"
+  xmlns:xul="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+  xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
+
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+
+<body id="body" xmlns="http://www.w3.org/1999/xhtml">
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=468176">Mozilla Bug 468176</a>
+
+<xul:hbox id="b1" value="foo"/>
+
+<xul:hbox id="o1">
+  <xul:observes id="inner" element="b1" attribute="*"/>
+</xul:hbox>
+
+<pre id="test">
+  <script class="testbody" type="text/javascript">
+<![CDATA[
+  SimpleTest.waitForExplicitFinish();
+
+  var broadcastCount = 0;
+  function b_listener(evt) {
+    ++broadcastCount;
+  }
+
+  function do_test() {
+    var b1 = document.getElementById("b1");
+    var o1 = document.getElementById("o1");
+    var inner = document.getElementById("inner");
+    is(o1.getAttribute("value"), b1.getAttribute("value"), "Wrong value (1)");
+
+    inner.addEventListener("broadcast", b_listener, true);
+    b1.setAttribute("value", "bar");
+    is(o1.getAttribute("value"), b1.getAttribute("value"), "Wrong value (2)");
+    is(broadcastCount, 1, "Wrong value (3)");
+
+    b1.removeAttribute("value");
+    is(o1.hasAttribute("value"), b1.hasAttribute("value"), "Wrong value (4)");
+    is(broadcastCount, 2, "Wrong value (5)");
+
+    o1.setAttribute("value", "foo");
+    isnot(o1.getAttribute("value"), b1.getAttribute("value"), "Wrong value (6)");
+    is(broadcastCount, 2, "Wrong value (7)");
+
+    b1.setAttribute("value", "foobar");
+    is(o1.getAttribute("value"), b1.getAttribute("value"), "Wrong value (8)");
+    is(broadcastCount, 3, "Wrong value (9)");
+
+    b1.removeAttribute("value");
+    is(o1.getAttribute("value"), b1.getAttribute("value"), "Wrong value (10)");
+    is(broadcastCount, 4, "Wrong value (11)");
+
+    b1.removeAttribute("value");
+    is(o1.getAttribute("value"), b1.getAttribute("value"), "Wrong value (12)");
+    is(broadcastCount, 4, "Wrong value (13)");
+
+    o1.setAttribute("value", "bar");
+    b1.setAttribute("value", "bar"); // This should still dispatch 'broadcast'
+    is(o1.getAttribute("value"), b1.getAttribute("value"), "Wrong value (14)");
+    is(broadcastCount, 5, "Wrong value (15)");
+
+    //After removing listener, changes to broadcaster shouldn't have any effect.
+    o1.remove();
+    b1.setAttribute("value", "foo");
+    isnot(o1.getAttribute("value"), b1.getAttribute("value"), "Wrong value (16)");
+    is(broadcastCount, 5, "Wrong value (17)");
+
+    SimpleTest.finish();
+  }
+
+  addLoadEvent(do_test);
+]]>
+  </script>
+</pre>
+</body>
+</window>
diff --git a/dom/xul/test/test_bug583948.xhtml b/dom/xul/test/test_bug583948.xhtml
new file mode 100644
index 0000000000..2cab13a4ac
--- /dev/null
+++ b/dom/xul/test/test_bug583948.xhtml
@@ -0,0 +1,41 @@
+<?xml version="1.0"?>
+<?xml-stylesheet href="chrome://global/skin" type="text/css"?>
+<?xml-stylesheet href="chrome://mochikit/content/tests/SimpleTest/test.css"
+                 type="text/css"?>
+
+<window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
+
+<script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js" />
+
+<body xmlns="http://www.w3.org/1999/xhtml">
+  <div id="content" style="display: none"/>
+</body>
+
+<script>
+SimpleTest.waitForExplicitFinish();
+
+let chromeWindow = window.browsingContext.topChromeWindow;
+
+var attempts = 0;
+
+chromeWindow.update = function () {
+  // without the crash fix, this usually crashes after 2 to 4 reloads
+  if (++attempts == 6) {
+    ok(true, "didn't crash after 6 attempts");
+    otherWindow.close();
+    SimpleTest.waitForFocus(function() {
+      chromeWindow.update = null;
+      SimpleTest.finish();
+    });
+  } else {
+    otherWindow.document.commandDispatcher.updateCommands('');
+    setTimeout(function() {
+      otherWindow.location.reload()
+    }, 0);
+  }
+}
+
+var otherWindow = chromeWindow.open("window_bug583948.xhtml", "_blank", "chrome");
+</script>
+
+</window>
diff --git a/dom/xul/test/test_bug749367.xhtml b/dom/xul/test/test_bug749367.xhtml
new file mode 100644
index 0000000000..3dcea24f1c
--- /dev/null
+++ b/dom/xul/test/test_bug749367.xhtml
@@ -0,0 +1,39 @@
+<?xml version="1.0"?>
+<?xml-stylesheet type="text/css" href="chrome://global/skin"?>
+<?xml-stylesheet type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"?>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=749367
+-->
+<window title="Mozilla Bug 749367"
+        xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+        onload="setTimeout(runTests, 0);">
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"/>
+
+  <!-- test results are displayed in the html:body -->
+  <body xmlns="http://www.w3.org/1999/xhtml">
+  <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=486990"
+     target="_blank">Mozilla Bug 486990</a>
+  </body>
+
+  <!-- test code goes here -->
+  <script type="text/template">
+  <![CDATA[
+  SimpleTest.waitForExplicitFinish();
+  function runTests() {
+  ok(false, "Shouldn't execute");
+  SimpleTest.finish();
+  }
+  ]]>
+  </script>
+
+  <script type="text/javascript">
+  <![CDATA[
+  SimpleTest.waitForExplicitFinish();
+  function runTests() {
+  ok(true, "Should execute");
+  SimpleTest.finish();
+  }
+  ]]>
+  </script>
+
+</window>
diff --git a/dom/xul/test/test_bug775972.xhtml b/dom/xul/test/test_bug775972.xhtml
new file mode 100644
index 0000000000..571bf6a6c3
--- /dev/null
+++ b/dom/xul/test/test_bug775972.xhtml
@@ -0,0 +1,35 @@
+<?xml version="1.0"?>
+<?xml-stylesheet type="text/css" href="chrome://global/skin"?>
+<?xml-stylesheet href="chrome://mochikit/content/tests/SimpleTest/test.css" type="text/css"?>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=775972
+-->
+<window title="Mozilla Bug 775972"
+        xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+        onload="test()">
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+
+  <!-- test results are displayed in the html:body -->
+  <body xmlns="http://www.w3.org/1999/xhtml">
+  <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=775972"
+     target="_blank">Mozilla Bug 775972</a>
+  </body>
+
+  <hbox id="container"><label value="test" id=""/></hbox>
+  <!-- test code goes here -->
+  <script type="application/javascript">
+  <![CDATA[
+
+  /** Test for Bug 775972 **/
+
+  function test() {
+    var c = document.getElementById("container");
+    var clone = c.cloneNode(true);
+    document.documentElement.appendChild(clone);
+    ok(true, "This shouldn't crash!");
+  }
+
+
+  ]]>
+  </script>
+</window>
diff --git a/dom/xul/test/test_disable_scroll_frame_plain.html b/dom/xul/test/test_disable_scroll_frame_plain.html
new file mode 100644
index 0000000000..8104f55721
--- /dev/null
+++ b/dom/xul/test/test_disable_scroll_frame_plain.html
@@ -0,0 +1,19 @@
+<!DOCTYPE HTML>
+<html scrolling="false">
+<head>
+  <meta charset="utf-8">
+  <title>disable scroll frame exposed</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+<pre id="test"></pre>
+<div style="height: 300vh"></div>
+<script>
+  // Ensure that disabling the scroll frame isn't exposed to content.
+  ok(document.scrollingElement.scrollTopMax > 0, "Scrolling should still work.");
+</script>
+</body>
+</html>
diff --git a/dom/xul/test/test_html_template.xhtml b/dom/xul/test/test_html_template.xhtml
new file mode 100644
index 0000000000..7e6029486e
--- /dev/null
+++ b/dom/xul/test/test_html_template.xhtml
@@ -0,0 +1,18 @@
+<?xml version="1.0"?>
+<?xml-stylesheet type="text/css" href="chrome://global/skin"?>
+<?xml-stylesheet type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"?>
+<window title="HTML template in XUL"
+        xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js" />
+  <body xmlns="http://www.w3.org/1999/xhtml">
+    <template id="template">Content<span>Content</span></template>
+<script type="application/javascript"><![CDATA[
+  add_task(async function test_template() {
+    let template = document.getElementById("template");
+    ok("content" in template, "Template has shadow root.");
+    is(template.childNodes.length, 0, "Template should have no children.");
+    is(template.content.childNodes.length, 2, "Template content should have two children.");
+  });
+]]></script>
+  </body>
+</window>
diff --git a/dom/xul/test/test_import_xul_to_content.xhtml b/dom/xul/test/test_import_xul_to_content.xhtml
new file mode 100644
index 0000000000..32db06e564
--- /dev/null
+++ b/dom/xul/test/test_import_xul_to_content.xhtml
@@ -0,0 +1,68 @@
+<?xml version="1.0"?>
+<?xml-stylesheet type="text/css" href="chrome://global/skin"?>
+<?xml-stylesheet href="chrome://mochikit/content/tests/SimpleTest/test.css" type="text/css"?>
+<window title="Mozilla Importing XUL into Content"
+        xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+
+  <!-- test results are displayed in the html:body -->
+  <body xmlns="http://www.w3.org/1999/xhtml">
+  <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=1027299"
+     target="_blank">Mozilla Bug 1027299</a>
+  </body>
+
+  <browser id="browserelt" src="about:blank" type="content"/>
+
+  <!-- test code goes here -->
+  <script type="application/javascript">
+  <![CDATA[
+
+  SimpleTest.waitForExplicitFinish();
+
+  function expectWarning(expected, when, f) {
+    Services.console.reset();
+
+    f();
+
+    var sawWarning = false;
+    var msgs = Services.console.getMessageArray();
+    for (var i = 0; i < msgs.length; i++) {
+      var msg = msgs[i];
+      if (!msg || !(msg instanceof Ci.nsIScriptError)) {
+        continue;
+      }
+
+      if (msg.category.includes("DOM") && msg.errorMessage.includes("Importing XUL")) {
+        sawWarning = true;
+      }
+    }
+
+    ok(sawWarning == expected, "correct warning condition when " + when);
+  }
+
+  var browser = document.getElementById("browserelt");
+  browser.addEventListener("load", function() {
+    var doc = browser.contentDocument;
+
+    // We add a <video> element, which contains anonymous XUL content. This should not warn.
+    var video = doc.createElement("video");
+    expectWarning(false, "appending video", function() {
+      doc.documentElement.appendChild(video);
+      // Force a layout flush to make sure the anonymous content is added.
+      // eslint-disable-next-line no-unused-vars
+      let dummy = doc.documentElement.offsetLeft;
+    });
+
+    // We add some XUL to a content document. This should generate a warning.
+    var elt = document.createXULElement("scrollbar");
+    var newElt = doc.importNode(elt, false);
+    expectWarning(true, "appending XUL", function() {
+      doc.documentElement.appendChild(newElt);
+    });
+
+    SimpleTest.finish();
+  });
+
+  ]]>
+  </script>
+</window>
diff --git a/dom/xul/test/test_xul_tabindex_focus.xhtml b/dom/xul/test/test_xul_tabindex_focus.xhtml
new file mode 100644
index 0000000000..1363d9b1e1
--- /dev/null
+++ b/dom/xul/test/test_xul_tabindex_focus.xhtml
@@ -0,0 +1,44 @@
+<?xml version="1.0"?>
+<?xml-stylesheet type="text/css" href="chrome://global/skin"?>
+<?xml-stylesheet href="chrome://mochikit/content/tests/SimpleTest/test.css" type="text/css"?>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=1128054
+-->
+<window title="Mozilla Bug 1128054"
+        xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
+<script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+<body>
+<!-- Test default focusability -->
+<label></label>
+<!-- Test tabindex=0 focusability -->
+<label tabindex="0"></label>
+<!-- Test tabindex=-1 focusability -->
+<label tabindex="-1"></label>
+<!-- Test tabindex=invalid focusability -->
+<label tabindex="invalid"></label>
+<!-- Tests code -->
+<script type="application/javascript">
+<![CDATA[
+
+/** Test for Bug 1128054 **/
+
+add_task(function test_xul_tabindex_focus() {
+  for (let element of document.querySelectorAll("label")) {
+    let desc = "xul element";
+    let focusable = false;
+    if (element.hasAttribute("tabindex")) {
+      let attr = element.getAttribute("tabindex");
+      focusable = Number.isInteger(Number.parseInt(attr));
+      desc += ` with tabindex=${attr}`;
+    }
+
+    element.focus();
+    focusable ? is(document.activeElement, element, desc + " should focusable")
+              : isnot(document.activeElement, element, desc + " should not focusable");
+  }
+});
+
+]]>
+</script>
+</body>
+</window>
diff --git a/dom/xul/test/window_bug1686822.xhtml b/dom/xul/test/window_bug1686822.xhtml
new file mode 100644
index 0000000000..1a2cf25636
--- /dev/null
+++ b/dom/xul/test/window_bug1686822.xhtml
@@ -0,0 +1,7 @@
+<?xml version="1.0"?>
+<?xml-stylesheet href="chrome://global/skin/global.css" type="text/css"?>
+<window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul" xmlns:html="http://www.w3.org/1999/xhtml">
+  <html:script type="module"><![CDATA[
+    window.opener.moduleScriptRan();
+  ]]></html:script>
+</window>
diff --git a/dom/xul/test/window_bug583948.xhtml b/dom/xul/test/window_bug583948.xhtml
new file mode 100644
index 0000000000..d0f6a26926
--- /dev/null
+++ b/dom/xul/test/window_bug583948.xhtml
@@ -0,0 +1,8 @@
+<?xml-stylesheet href="chrome://browser/skin/" type="text/css"?>
+<window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul" onload="opener.update()">
+
+<command oncommandupdate="document.removeChild(document.documentElement)" commandupdater="true"/>
+<box command="c"/>
+<iframe/>
+
+</window>
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