In just under a year, firefox (the best browser around) has managed over 100million downloads. If you haven't got it, I suggest clicking on the firefox image on your left and get a copy.
Firefox 1.5 is well on to release candidate early next week, this is when you will be able to play with it with a minimal number of bugs.
I have been using it as my default browser for the last 2 months and I can do nothing but recommend that you get it when it comes out.