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+<!DOCTYPE>
+<html>
+<head>
+<title>Test for bug1318312</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" />
+<style type="text/css">
+</style>
+</head>
+<body>
+<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>
+<pre id="test">
+<script class="testbody" type="text/javascript">
+
+var outerEditor = document.getElementById("outerEditor");
+var innerEditor = document.getElementById("innerEditor");
+
+function runTests() {
+  outerEditor.focus();
+  is(document.activeElement, outerEditor,
+     "outerEditor should have focus");
+
+  // Move cursor into the innerEditor with ArrowDown key.  Then, focus shouldn't
+  // be moved to innerEditor from outerEditor.
+  // Note that Chrome moves focus in this case.  However, we should do that
+  // at least for now because user can move focus with ArrowUp key even from
+  // innerEditor to outerEditor but we don't allow such navigation.
+  // FYI: Edge behaves same as us.
+  synthesizeKey("KEY_ArrowDown");
+  is(document.activeElement, outerEditor,
+     "outerEditor should still have focus because focus shouldn't be moved by moving caret");
+  is(document.getSelection().focusNode, document.getElementById("innerEditor").firstChild.firstChild,
+     "focus node of selection should be the text node in the innerEditor");
+  is(document.getSelection().focusOffset, 0,
+     "focus offset of selection should be 0");
+
+  sendString("a");
+  is(document.activeElement, outerEditor,
+     "outerEditor should still have focus because focus shouldn't be moved by typing a character");
+  is(document.getSelection().focusNode, document.getElementById("innerEditor").firstChild.firstChild,
+     "focus node of selection should be the text node in the innerEditor");
+  is(document.getSelection().focusOffset, 1,
+     "focus offset of selection should be 1");
+
+  synthesizeKey("KEY_Enter");
+  is(document.activeElement, outerEditor,
+     "outerEditor should still have focus because focus shouldn't be moved by typing Enter");
+  is(document.getSelection().focusNode, document.getElementById("innerEditor").childNodes.item(1).firstChild,
+     "focus node of selection should be the text node in the second paragraph in the innerEditor");
+  is(document.getSelection().focusOffset, 0,
+     "focus offset of selection should be 0");
+
+  synthesizeKey("KEY_Backspace");
+  is(document.activeElement, outerEditor,
+     "outerEditor should still have focus because focus shouldn't be moved by typing Backspace (removing the line breaker)");
+  is(document.getSelection().focusNode, document.getElementById("innerEditor").firstChild.firstChild,
+     "focus node of selection should be the text node in the innerEditor");
+  is(document.getSelection().focusOffset, 1,
+     "focus offset of selection should be 1");
+
+  synthesizeKey("KEY_ArrowLeft", {shiftKey: true});
+  is(document.activeElement, outerEditor,
+     "outerEditor should still have focus because focus shouldn't be moved by typing Shift+ArrowLeft (selecting 'a')");
+  is(document.getSelection().focusNode, document.getElementById("innerEditor").firstChild.firstChild,
+     "focus node of selection should be the text node in the innerEditor");
+  is(document.getSelection().focusOffset, 0,
+     "focus offset of selection should be 0");
+  is(document.getSelection().anchorNode, document.getElementById("innerEditor").firstChild.firstChild,
+     "anchor node of selection should be the text node in the innerEditor");
+  is(document.getSelection().anchorOffset, 1,
+     "anchor offset of selection should be 1");
+
+  synthesizeKey("KEY_Delete");
+  is(document.activeElement, outerEditor,
+     "outerEditor should still have focus because focus shouldn't be moved by typing Delete (removing the 'a')");
+  is(document.getSelection().focusNode, document.getElementById("innerEditor").firstChild.firstChild,
+     "focus node of selection should be the text node in the innerEditor");
+  is(document.getSelection().focusOffset, 0,
+     "focus offset of selection should be 0");
+
+  synthesizeKey("KEY_ArrowUp");
+  is(document.activeElement, outerEditor,
+     "outerEditor should still have focus because focus shouldn't be moved by moving caret from innerEditor to outerEditor");
+  is(document.getSelection().focusNode, document.getElementById("outerEditor").firstChild.firstChild,
+     "focus node of selection should be the text node in the outerEditor");
+  is(document.getSelection().focusOffset, 0,
+     "focus offset of selection should be 0");
+
+  // However, clicking in innerEditor should move focus.
+  synthesizeMouseAtCenter(innerEditor, {});
+  is(document.activeElement, innerEditor,
+     "innerEditor should get focus because focus should be moved to innerEditor even from outerEditor by click");
+  is(document.getSelection().focusNode, document.getElementById("innerEditor").firstChild.firstChild,
+     "focus node of selection should be the text node in the innerEditor");
+
+  SimpleTest.finish();
+}
+
+SimpleTest.waitForExplicitFinish();
+SimpleTest.waitForFocus(runTests);
+
+</script>
+</pre>
+</body>
+</html>