Ever since I got my new (to me) laptop, Firefox has been really buggy. Crashing regularly freezing up SO OFTEN, really slow. It was the only program experiencing problems, so it had to be Firefox and not the laptop. So I refreshed Firefox last night (that thing you can do where it keeps your bookmarks, passwords, add-ons, and history, but sets everything else back to factory settings. So far, it seems to be good. Here's hoping it fixed the problem.