On that same point, whenever something starts failing to work on firefox (on Windows or Linux), I have come realize that it's probably an "unobtrusive auto-update" that is causing it. Sure enough, closing and restarting firefox gives me a new tab showing what was just "unobtrusively auto-updated", and whatever was broken is now working again.

I don't think they know what "unobtrusive" means.

Having said that, even with the previous complaints it's still much better than the privacy problems with chrome, at least in my opinion.