Chrome - the browser from Google is now out of Beta. Right now the latest version is only available for WIndows but I read that the Mac version is coming out soon.
The download was really fast and installation was a breeze. However, I had to close my Firefox browser before the installation could go ahead.
The guys at Google are not joking when they said that it "starts up fast".
However, I am not ready to shift from Firefox just as yet. I guess the biggest advantage that Firefox has over Chrome are the customisable add-ons or extensions.