title: iFrame in Firefox hidden window with a contentWindow.history?
body: <p>I'm trying to run a hosted script with content privileges in my Firefox extension. To do this, I create a content iframe in the hidden window pointed at a html file that pulls the script. This script requires the 'history' be available, but the iframes created in the hidden window have no history for some reason.</p>
  
  <p>Chromebug reports this for the iframe's contentWindow.history:</p>
  
  <p><code>object does not support history (nsIDOMHistory)</code></p>
  
  <p>And the script gives this error when its not available:</p>
  
  <p><code>Error: Component returned failure code: 0x80004005 (NS_ERROR_FAILURE) [nsIDOMHistory.length]</code></p>
  
  <p>Any ideas?</p>