The Firefox browser from Mozilla is on version three. And version three is currently available as “Prerelease Candidate 2”. That means it’s not ready for public consumption, but many people are using it. It’s unlikely that much will change after Prerelease Candidate 2, so let’s go with it. According to Walt Mossberg at least, Firefox 3 is the best browser you can buy right now, and of course, like all the other major browsers, you can’t buy it — it’s free. I’ve been using prerelease versions of Firefox 3.0