Anecdotal, but I've never once had a problem with any function of Firefox in the decade I've been using it. On the contrary it's been the most stable browser I've had the pleasure of using, orders of magnitude more reliable in all situations than Chrome or Opera ever was.
This post smells of astroturfing. There's been an awful lot of "why is Firefox so shit?" posts recently, now that Google is proving itself untrustable.
But regardless I'm at the hospital for them to remove a teacup from my ass. I am not leaving this hospital until the teacup comes out of the asshole in question. They're going to be working closely in that area anyway, I would think checking for contusions would be standard practice. It's not like the relative insertion speed of this teacup is going to break my elbow as well, any injuries are going to be generally in the same zip code.