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):

  1. load the page
  2. try to upload a very large file (over 1GB)
  3. upload takes a very long time to start, then progress is all screwed up and it seems to upload the file twice

If between the steps 1 and 2 I upload a smaller file, the large file starts uploading properly, with good progress indication.

To experience this, you need only to try the steps above on the following demo page: http://exposureroom.biz/upload.aspx. The demo page is from a well known example of HTML5 upload: http://www.matlus.com/html5-file-upload-with-progress/ . I didn't write it myself, but it behaves identically with my script and it's accessible.

Is this a browser bug? Has anybody run into this before?

Thanks

javascript html firefox file-upload
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