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diff --git a/editor/libeditor/tests/test_bug471319.html b/editor/libeditor/tests/test_bug471319.html
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+++ b/editor/libeditor/tests/test_bug471319.html
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+<!DOCTYPE HTML>
+<!-- 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/. -->
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=471319
+-->
+
+<head>
+  <title>Test for Bug 471319</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" href="/tests/SimpleTest/test.css">
+</head>
+
+<body onload="doTest();">
+  <a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=471319">Mozilla Bug 471319</a>
+  <p id="display"></p>
+  <div id="content" style="display: none">
+  </div>
+
+  <pre id="test">
+    <script type="application/javascript">
+
+      /** Test for Bug 471319 **/
+
+      SimpleTest.waitForExplicitFinish();
+
+      function doTest() {
+        let t1 = SpecialPowers.wrap($("t1"));
+
+        // Test 1: Undo on an empty editor - the editor should not forget about
+        // the padding <br> element for empty editor.
+        let t1Editor = t1.editor;
+
+        // Did the editor recognize the new padding <br> element?
+        t1Editor.undo();
+        ok(!t1.value, "<br> still recognized as padding on undo");
+
+
+        // Test 2: Redo on an empty editor - the editor should not forget about
+        // the padding <br> element for empty editor.
+        let t2 = SpecialPowers.wrap($("t2"));
+        let t2Editor = t2.editor;
+
+        // Did the editor recognize the new padding <br> element?
+        t2Editor.redo();
+        ok(!t2.value, "<br> still recognized as padding on redo");
+
+
+        // Test 3: Undoing a batched transaction where both end points of the
+        // transaction are the padding <br> element for empty editor - the
+        // <br> element should still be recognized as padding.
+        t1Editor.beginTransaction();
+        t1.value = "mozilla";
+        t1.value = "";
+        t1Editor.endTransaction();
+        t1Editor.undo();
+        ok(!t1.value,
+           "recreated <br> from undo transaction recognized as padding");
+
+
+        // Test 4: Redoing a batched transaction where both end points of the
+        // transaction are the padding <br> element for empty editor - the
+        // <br> element should still be recognized padding.
+        t1Editor.redo();
+        ok(!t1.value,
+           "recreated <br> from redo transaction recognized as padding");
+        SimpleTest.finish();
+     }
+   </script>
+  </pre>
+
+  <input type="text" id="t1" />
+  <input type="text" id="t2" />
+</body>
+</html>