I use Firefox mainly because I'm used to it. Tried Flock and didn't like it but I don't recall why. It was quite a while back so maybe I would now. I like Opera and have been using it off and on for years, even when the free version had adverts. I've used Sea Monkey in the past and its fine. Usually use Safari on my Macbook but also have Opera and Firefox as well. On one of my Linux boxes I use Firefox with the 3.0 Netscape theme that brings back the old days when I used Netscape over IE.