Chrome. I think I originally started using it because it was faster than Firefox. Or at least it loaded faster. I'm not sure if it's significantly faster now (if it loads faster it's only because now it loads itself automatically on bootup so it's loaded even if you don't have a window open). I think I may have had some issues with Firefox on certain websites too. Firefox was the one with more options, though (don't know if it's still that way). Now I just use Chrome out of habit and also because I like the way its top separators look better. (Well, they were a little bit better before they changed them.)