Google Chrome

http://www.computerworld.com/s/article/9138331/Chrome_buries_Windows_rivals_in_browser_drag_race

This article compares speed of different browsers and shows that not all of them are equal. When the speed is the factor, one would like to use Chrome - it is faster and offers bigger viewing space for webpages. I personally use Chrome on my tiny netbook where every inch counts.

However, stable version of Chrome for MacOS and Linux hasn't been released yet. These users will just have to wait :)