I've just installed Firefox 2 and I really dig the bastard.
→[More:]I've never really thought too much about a browser before, other than that it's sort of fun messing around with FF's extensions. This thing, though, is really well executed, noticeably faster, and keeps surprising me with nifty little touches. The built-in form spellchecker is especially creamy.
What other doodads/extensions/add-ons should I keep my good eye twitching for?