Firefox works fine for me.
I stopped using Netscape when they were acquired by AOL. I really should have stopped using it sooner, as it was rapidly devolving into bloatware. The AOL acquisition was just the last straw. Ironically, I went back to using IE. /ubbthreads/images/graemlins/icon3.gif
I've used Opera, and it turned me on to tabbed browsing. However, I'm too cheap to purchase the registered version, and the banner ads in the free version annoyed me.
I have Firefox configured so that three tabs open up at start-up: my web-based e-mail, my customized home page at one of those big ol' portal websites, and (of course) CPF.
Firefox is preferable to Opera, because there are more third-party plugins (e.g. Macromedia Flash) available. Of course those might open up some security holes in the future, but I'm not aware of any threats from Firefox browser plug-ins... yet...