I do have a love/hate relationship with Firefox. It was only recently that it became too much for me, and I switched to Chrome (well, that is a pilot). See, I like using Firefox. I like many many things about Firefox.
Alas, after reaching a certain amount of MB's of RAM (or GB's, rather), it becomes unusable. It'll hang for maybe 3 seconds on each tab no matter where I click. If I'm especially unlucky that day, it'll actually crash. Usually though, it doesn't, because I feel myself forced to restart it. The reason I abandoned it that day is because it completely forgot my app tabs AGAIN for absolutely not reason at all and that was after I had to kill the process because the whole thing wouldn't respond anymore. That pissed me off enough to say my goodbyes.
I wouldn't have stuck with Chrome as long as I have (a few weeks now) were it not for the fact that it is always snappy, it loads the exact same pages much faster than Firefox does and... well it just never really seems to slow down. Not just loading pages, but switching tabs and such: the interface is MUCH MUCH faster. It's by no means perfect: I think the options "page" is a usability nightmare (come on, everything on ONE page?) and I do have to get used to it but it's not the biggest transition in the world. I'm also not sure if I trust Google so maybe I should install SRWare Iron instead.
Anyway, I'll probably try it again in a few releases.