The Tor Browser / file revision

 <?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=618176

 -->

 <window title="Mozilla Bug 618176"

   xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"

   onload="start()">

   <label value="Mozilla Bug 618176"/>

   <!-- test code goes here -->

   <script type="application/javascript"><![CDATA[

     const TEST_PAGE =

 "data:text/html,<script>var a=[1,2,3];</script>Hi";

     const FRAME_SCRIPT = 

 "data:,addEventListener('pageshow', function() { sendAsyncMessage('test', content.wrappedJSObject.a) }, false);";

    // s/content.wrappedJSObject.a/[ 1, 2, 3]/ and the test passes

     function recvTest(m) {

       var a = m.json;

       opener.wrappedJSObject.is(a.length, 3, "array was serialized and deserialized");

       messageManager.removeMessageListener("test", recvTest);

       finish();

     }

     function start() {

       messageManager.addMessageListener("test", recvTest);

       messageManager.loadFrameScript(FRAME_SCRIPT, true);

       setTimeout(function () { document.getElementById("browser").loadURI(TEST_PAGE); }, 0);

     }

     function finish() {

       opener.setTimeout("done()", 0);

       window.close();

     }

   ]]></script>

   <browser id="browser" type="content" style="width: 200px; height: 200px;"/>

 </window>