Added a copy of Firebug Lite for debugging purposes. License is uncertain but being treated as MPL. (If is is not MPL then it is under something more permissive that permits relicensing anyway)
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>blank_page</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<link href="css/blank.css" rel="stylesheet" type="text/css" />
<base target="_self" />
<script type="text/javascript">
function init() {
if (parent.tinymce.isIE)
document.body.contentEditable = true;
else
document.designMode = 'on';
parent.initIframe(document);
window.focus();
}
</script>
</head>
<body onload="init();">
</body>
</html>