title: iframe content disappears on Firefox
body: <p>I am filling an empty iframe with basic HTML, using <code>$iframe.contents().find('body').html(contentBody);</code></p>
  
  <p>See: <a href="http://jsfiddle.net/UjT2b/2/" rel="noreferrer">http://jsfiddle.net/UjT2b/2/</a></p>
  
  <p>This works well on Chrome. On Firefox, I can see very briefly the content inside, but then it suddenly disappears. When I set a breakpoint on this line with Firebug, then continue running, the content stays inside. But if I set a breakpoint on the line after, it goes away.</p>
  
  <p>Any clue on how to fix this?</p>