I have FireFox and enjoy it, but lately I've been using the new Mozilla replacement SeaMonkey as a default browser. It's fast, and the layout is pretty sharp.
Though it's not a full-featured browser, I also use the tiny yet powerful CrazyBrowser a lot. When I find a webcomic I like or something else I want to check at least a few times a week, I open it up on a new tab in CB. Then, once a day, I open up CB and everything loads automatically (it remembers open tabs from the last session). I flip through each tab, reading anything that's changed since yesterday, then I close CB and use SeaMonkey the rest of the day.
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It is an act of faith to assert that our thoughts have any relation to reality at all. - G. K. Chesterton
http://jellynail.vox.com/