<?xml version="1.0"?>
<?xml-stylesheet href="chrome://global/skin/" type="text/css"?>
<window id="yourwindow"
        xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
        xmlns:html="http://www.w3.org/1999/xhtml">
<script type="text/javascript">
<![CDATA[
function load()
{
  netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
  var frame = document.getElementById("frame");
  var contentViewer = frame.docShell.contentViewer.QueryInterface(Components.interfaces.nsIMarkupDocumentViewer);
  contentViewer.fullZoom = 0.5;
  var canvas = document.getElementById("canvas");
  var ctx = canvas.getContext("2d");
  ctx.drawWindow(frame.contentWindow, 0, 0, 200, 200, "rgba(255,255,255,255)");
}
window.addEventListener("load", load, false);
]]>
</script>
<vbox align="left">
<iframe id="frame" style="border: 1px solid black; width: 200px; height: 200px; visibility:hidden" src="401361-frame.html"/>
<html:canvas id="canvas" width="200" height="200"/>
</vbox>
</window>
