I started to download a videosession with the Downloadhelper-extension. After updating my FF to the latest version, the downloads don't show up in the downloadtab anymore. Now I simply want to stop these downloads as they are no longer needed. So I deinstalled the extension and restarted FF....weird...after a few seconds the download pops up again and continues automatically. If nothing helps, I have to deinstall FF... I hope anyone can help me with this issue.