Great when firefox stop updating Rated 5 out of 5 stars

I tried the beta fix after updating to FF19 and it has sorted many of the problems out. however, I now have the problem of videos not completing their downloads and stopping at a random point (say, at 70mb out of 200mb video file). It has also stopped warning me about cancelling the download if I try to close Firefox down, despite me checking all the settings to warn me.

This review is for a previous version of the add-on (4.9.13.1-signed).