<html>
<head>
<script>
window.onmessage = function() {
	document.write(plg.privateBrowsingEnabled);
	window.parent.postMessage('complete', '*');
}
</script>
</head>
<body>
<embed name="plg" type="application/x-webkit-test-netscape" test="private-browsing"></embed>
</body>
</html>