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diff --git a/testing/web-platform/mozilla/tests/focus/Selection_removeAllRanges.html b/testing/web-platform/mozilla/tests/focus/Selection_removeAllRanges.html
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+++ b/testing/web-platform/mozilla/tests/focus/Selection_removeAllRanges.html
@@ -0,0 +1,112 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>focus move tests caused by a call of Selection.removeAllRanges()</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<body>
+<div style="height: 3000px;">Spacer to check whether or not page was scrolled down to focused editor</div>
+<p id="staticBefore">static text</p>
+<div id="editor" contenteditable><p>content of editor</p></div>
+<div id="outerEditor" contenteditable
+><p>content of outer editor</p><div id="staticInEditor" contenteditable="false"
+><p>static content of outer editor</p><div id="innerEditor" contenteditable
+><p>content of inner editor</p></div></div></div>
+<p id="staticAfter">static text</p>
+<p><a id="anchor" href="about:blank">anchor</a></p>
+<script>
+"use strict";
+
+var staticBefore = {
+    element: document.getElementById("staticBefore"),
+    textNode: document.getElementById("staticBefore").firstChild,
+    textLength: document.getElementById("staticBefore").firstChild.length
+};
+var editor = {
+    element: document.getElementById("editor"),
+    textNode: document.getElementById("editor").firstChild.firstChild,
+    textLength: document.getElementById("editor").firstChild.firstChild.length
+};
+var outerEditor = {
+    element: document.getElementById("outerEditor"),
+    textNode: document.getElementById("outerEditor").firstChild.firstChild,
+    textLength: document.getElementById("outerEditor").firstChild.firstChild.length
+};
+var staticInEditor = {
+    element: document.getElementById("staticInEditor"),
+    textNode: document.getElementById("staticInEditor").firstChild,
+    textLength: document.getElementById("staticInEditor").firstChild.length
+};
+var innerEditor = {
+    element: document.getElementById("innerEditor"),
+    textNode: document.getElementById("innerEditor").firstChild.firstChild,
+    textLength: document.getElementById("innerEditor").firstChild.firstChild.length
+};
+var staticAfter = {
+    element: document.getElementById("staticAfter"),
+    textNode: document.getElementById("staticAfter").firstChild,
+    textLength: document.getElementById("staticAfter").firstChild.length
+};
+var anchor = {
+    element: document.getElementById("anchor"),
+    textNode: document.getElementById("anchor").firstChild,
+    textLength: document.getElementById("anchor").firstChild.length
+};
+
+function resetFocusAndSelectionRange(aFocus)
+{
+    document.getSelection().removeAllRanges();
+    if (document.activeElement) {
+        document.activeElement.blur();
+    }
+    if (aFocus) {
+        aFocus.element.focus();
+        document.getSelection().collapse(aFocus.textNode, 0);
+    } else {
+        document.getSelection().collapse(staticBefore.textNode, 0);
+    }
+    document.documentElement.scrollTop = 0;
+}
+
+test(function() {
+    resetFocusAndSelectionRange(staticBefore);
+    document.getSelection().removeAllRanges();
+    assert_equals(document.activeElement, document.body);
+    assert_equals(document.documentElement.scrollTop, 0);
+}, "Active element should be the <body> after Selection.removeAllRanges() when active element is the <body> and selection is at the start of the first text node of 'staticBefore'");
+test(function() {
+    resetFocusAndSelectionRange(editor);
+    document.getSelection().removeAllRanges();
+    assert_equals(document.activeElement, editor.element);
+    assert_equals(document.documentElement.scrollTop, 0);
+}, "Active element should be 'editor' after Selection.removeAllRanges() when active element is 'editor' and selection is at the start of the first text node of 'editor'");
+test(function() {
+    resetFocusAndSelectionRange(outerEditor);
+    document.getSelection().removeAllRanges();
+    assert_equals(document.activeElement, outerEditor.element);
+    assert_equals(document.documentElement.scrollTop, 0);
+}, "Active element should be 'outerEditor' after Selection.removeAllRanges() when active element is 'outerEditor' and selection is at the start of the first text node of 'outerEditor'");
+test(function() {
+    resetFocusAndSelectionRange(staticInEditor);
+    document.getSelection().removeAllRanges();
+    assert_equals(document.activeElement, document.body);
+    assert_equals(document.documentElement.scrollTop, 0);
+}, "Active element should be the <body> after Selection.removeAllRanges() when active element is the <body> and selection is at the start of the first text node of 'staticInEditor'");
+test(function() {
+    resetFocusAndSelectionRange(innerEditor);
+    document.getSelection().removeAllRanges();
+    assert_equals(document.activeElement, innerEditor.element);
+    assert_equals(document.documentElement.scrollTop, 0);
+}, "Active element should be 'innerEditor' after Selection.removeAllRanges() when active element is 'innerEditor' and selection is at the start of the first text node of 'innerEditor'");
+test(function() {
+    resetFocusAndSelectionRange(staticAfter);
+    document.getSelection().removeAllRanges();
+    assert_equals(document.activeElement, document.body);
+    assert_equals(document.documentElement.scrollTop, 0);
+}, "Active element should be the <body> after Selection.removeAllRanges() when active element is the <body> and selection is at the start of the first text node of 'staticAfter'");
+test(function() {
+    resetFocusAndSelectionRange(anchor);
+    document.getSelection().removeAllRanges();
+    assert_equals(document.activeElement, anchor.element);
+    assert_equals(document.documentElement.scrollTop, 0);
+}, "Active element should be 'anchor' after Selection.removeAllRanges() when active element is 'anchor' and selection is at the start of the first text node of 'anchor'");
+</script>