Definatly Firefox. I've been using it for quite some time now, and been loving it. The memories of IE evils are almost gone . IE is just way to insecure becuase microsoft doesnt seem to care to ever update it. Where as with firefox, if theres a security hole that they know of, they will patch that thing up asap. Also it just does a better job of being secure in the first place. And with web development, Firefox just seems to... understand my css wayyy better then IE. I really wish IE would follow more standards of rendering that make sense. Its always so much fun spending a ton of time trying to get the browsers to all love your css. And I hate the fact I must still desgin for IE.The most intresting thing is, I remeber just a few years ago I was reading some stastics somewhere that IE owned over 90% of the browser market, as it squeezed what little control netscape had out of it. Then just recently I stumbled on recent statistics that showed how IE now only has something like 65-70% of market, with firefox having 25%.Also, I cant wait for Firefox 2.0... who cares about IE 7?