Firefox exclusively now that Chrome's rendering engine is broken. I missed my add-ons quite a bit, actually, and the newer 3.x builds of Firefox are pretty snappy, even when loaded down.
You missed Konqueror, though. It's a pretty widespread browser on the Linux side (used to be the analogue to IE in my books, especially how it integrates with KDE). There's others, too, but nobody actually uses Galeon, Epiphany or Mozilla, and K-Meleon and Iceweasel don't count (derivatives).
EDIT: Lawl at Lynx. I have a "Lynx Viewer" plugin (Yellowpipe Lynx Viewer Tool) for Firefox because text browsers are awesome. Well. Not really. Either way,
Links is a much more feature-complete text-based web browser.