I would assume it would work similarly to how extensions update - or perhaps how the "Update Notifier" addon works. The way I configured it, it checks for upda

I would assume it would work similarly to how extensions update - or perhaps how the "Update Notifier" addon works. The way I configured it, it checks for updates to addons every few hours, and if it finds one, installs it silently. The next time Firefox starts, it's ready to go - basically, it does the same thing as a manual check, install updates, but instead of clicking the "Restart Firefox" button, just leaves me alone. I hope that's basically how they do it... it really would be background - except for those that don't restart Firefox every week or so... but at least for me, addon memory leaks still cause me to restart Firefox every other day or so (I have -- oh, this is great! I just counted - I have 42 extensions installed. hehe)