I know there are several different web browsers out there (the only two I know of are Internet Explorer and Firefox. So, which browser do you use and what are your reasons for using it??
Firefox here. Last I tried Chrome didn't have a decent ad blocker. Also, I very strongly prefer having a separate search bar, it really comes into its own when I'm doing a string of searches on Wikipedia or any other website that's not Google.
Opera is awesome, especially with it's speed dial.
I use Firefox.
I love Opera and Chrome, but Firefox is far more extensible than those two, and I love my extensions (I have around a dozen right now, including indispensable ones like NoScript, Greasemonkey, InvisibleHand). It's also nice to swap themes now and then as easily as it lets you. I'd actually recommend that anyone who doesn't make use of Firefox's extensibility switch to Opera or Chrome, because they're arguably better browsers out of the box.