title: HTML5 file upload - stuck on very large files - Firefox only
body: <p>I am trying to get a HTML5 upload to work well. So far I have it working properly, with no problems at all. The only issue I am having looks like this (Firefox browser only - Chrome works well):</p>
  
  <ol>
  <li>load the page</li>
  <li>try to upload a very large file (over 1GB)</li>
  <li>upload takes a very long time to start, then progress is all screwed up and it seems to upload the file twice</li>
  </ol>
  
  <p>If between the steps 1 and 2 I upload a smaller file, the large file starts uploading properly, with good progress indication.</p>
  
  <p>To experience this, you need only to try the steps above on the following demo page: <a href="http://exposureroom.biz/upload.aspx" rel="nofollow noreferrer">http://exposureroom.biz/upload.aspx</a>. The demo page is from a well known example of HTML5 upload: <a href="http://www.matlus.com/html5-file-upload-with-progress/" rel="nofollow noreferrer">http://www.matlus.com/html5-file-upload-with-progress/</a> . I didn't write it myself, but it behaves identically with my script and it's accessible.</p>
  
  <p>Is this a browser bug? Has anybody run into this before?</p>
  
  <p>Thanks</p>