title: How can I render HTML from an nsIXMLHttpRequest in a firefox addon?
body: <p>I'm sending a nsIXMLHttpRequest to a service that can return HTML content.  I can display the raw HTML inside a multiline textbox, but  I'd like to be able to display the rendered HTML in my addon (preferably inside a xul tabpanel).  </p>
  
  <p>Is there a control I could use to do this?  The only things that seem to render HTML take their input from a URL, where I need it to come from a javascript variable somehow.</p>
  
  <p>*<em>Edit: Found the answer minutes after posting, sorry *</em></p>