help!

I am so pissed off at Mozilla Firefox that I actually opened up Internet Explorer. Firefox was working just fine until I had to reset my computer. When I went to download the browser, it was a newer version than the one I had before. Now I'm having all sorts of problems. The browser freezing up, issues with running scripts, facebook not wanting to work...

Does anyone have any advice? Like a better browser? Or something? I usually like Firefox, but I'm getting tired of all the issues.