So you're sick of Internet Explorer's vulnerabilities and Netscape's slow clunker isn't doing it for you anymore? Give Firefox Preview Release a shot... tabbed browsing, built-in popup blocker and nifty extensions make it a winner.

I've been using Firefox off and on for the last year or so and I haven't had any performance or stability issues. The main reason I still use Internet Explorer is because I'm too lazy to configure proxy settings at work.