Google. It gives better results on what your looking for, plus they change the theme of the main page every few months unlike Firefox 或者 other browsers that can't do that.
I've got 3 different browsers. Firefox, Chrome, Explorer, and Safari. I only use three of them, I use Explorer for school, Firefox and Chrome for other things. I hardly go on Safari. I used to only use Explorer and Firefox, but then Firefox kinda stuffed up, so I started using Chrome. Now I use both.