Actually Google Chrome has been slowly overtaking Internet Explorer and is well on its way to overtake Firefox (I personally still use Firefox, but I might very well switch to Google Chrome when I purchase my next computer).
I use Google Chrome. I don't really like how it looks, and i hate the fact that if you browse with a gazilion tabs, like I do, it gets really slow. But! it has some AMAZING extensions, that i can't really find in any other browser. I'd prefer opera, but it lacks awesome extensions, and so, chrome will have to do ..