Here's what I think would be ideal from a User Experience perspective: Firefox silently prepares the update as soon as it's received but keeps the old files aro

Here's what I think would be ideal from a User Experience perspective: Firefox silently prepares the update as soon as it's received but keeps the old files around. At either the start or end of the browsing session, it asks whether you would like it to update or not and, if you do, all it has to do is flip a bit switch and you're updated. The major pain in updating is that the point where I'm starting my browser, I'm usually in the middle of doing something. Interrupting that by 30 seconds is not my idea of fun.