Firefox 2.0 has just been released, and what can I say? If you want a fast and friendly browser, go for it.
Today I had the dubious pleasure of playing with the other browser to be released at the same time, Internet Explorer 7 by some company called Microsoft. We already had compatibility issues with it at work, caused by the way it supports ActiveX.
You don't get such bullshit with Firefox, and overall the experience is faster and smoother. I like the built in spell checker in particular - makes blogging that much easier.