Chrome. I love it, too, since it's bright, efficient as far as key strokes (I just type in one letter and my most-visited site comes up), never seems to crash, and just has a very clean-looking interface. I used to use firefox because I liked the wikipedia, espn, nba.com, amazon, etc. search bars, but you can do the same thing in chrome by just typing in the first letter or two of each site and hitting tab. I still use Firefox for porn, though, since I don't mind clearing the entire browser history when I look at stuff that's truly shameful.
just hit ctrl+shift+n . Opens incognito window.
Pages you view in this window won't appear in your browser history or search history, and they won't leave other traces, like cookies, on your computer after you close the incognito window.