I’ve been using Firefox 3 for several months now and I can tell you with certainty that it is much superior to Microsoft’s Internet Explorer 7. It supports a wide range of add-ons and even if you don’t use any of the add-on features it’s still more stable and quicker. I’ve seen many web applications just not run on IE 7, when I try with Firefox 3 it works like a charm.
Reference jump: Firefox hits 20%
Download Firefox 3: Mozilla Downloads


