I'll try it again but I'm pretty sure when I reinstalled windows I tired to download firefox and it wouldn't work multiple times so I ended up with flock.
Flock is a great browser. Haven't tried it lately on this site, although Firefox and Flock should operate very similarly as they are based upon the same engine.
I notice if I get a lot of tabs open in either one the browser can freeze and die on any site. Google Chrome is not perfect yet, but at least you can individually kill each tab as its own individual process, which is helpful.