title: Firefox/Mozilla personas errors -- URL change?
body: <p>Has the location for Firefox/Mozilla personas changed? Looking at the error console I see:</p>
  
  <pre><code>GET https://addons.cdn.mozilla.net/en-US/firefox/_files/245568/firefoxtom.jpg [HTTP/1.1 404 Not Found 299ms]
  </code></pre>
  
  <p>Redownloading the persona gives: </p>
  
  <pre><code>GET https://addons.cdn.mozilla.net/user-media/addons/245568/firefoxtom.jpg [HTTP/1.1 200 OK 756ms]
  </code></pre>
  
  <p>For all my current personas, I only see the background color, not the image. Has something changed recently? Is there a workaround? FF 31. Thanks!</p>