Firefox is a much better browser than the market share would indicate. With just one big exception (tab management), I would go so far as to say it's the best browser available to nearly all ...
Firefox 1.5 will undergo additional rounds of testing -- several Release Candidate editions at the least -- before it goes final in November or December. So far, it seems on track. On Sept.
I've been a Chrome user for the longest time, but I recently switched to Firefox because of its advanced security settings.