<html xmlns="http://www.w3.org/1999/xhtml" style="-moz-binding: url(#foo)">
<head>
<bindings xmlns="http://www.mozilla.org/xbl">
<binding id="foo"><content><listcell xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"><children xmlns="http://www.mozilla.org/xbl"/></listcell></content></binding>
</bindings>
</head>

<body onload="document.documentElement.innerHTML = 'x';"></body>
</html>