it's crap compared to rockmelt tho. Rockmelt is google chrome but better! It have more features etc and have been coded by ex-developers from Facebook, but otherwise i would recommend Google Chrome to those that do not have Rockmelt yet!(and ain't active on facebook chat)
Firefox - has to many stupid add ons so it is barely useable.
Chrome - it's fast, that's about it.
Rock melt - Pretty much for people who just loves Facebook and who uses it on daily bases.
It has better add-ons, but only if you choose to download them - so things don't get crowded, unlike Firefox. Better themes, better layout, faster and just generally better imo..
Firefox - has to many stupid add ons so it is barely useable.
Chrome - it's fast, that's about it.
Rock melt - Pretty much for people who just loves Facebook and who uses it on daily bases.