OStatic has a list of six "must-have" Firefox extensions today. "Six?" you say. "That's not many." That's what I thought at first, but five of them I had never heard of, and have already downloaded two of them to start using immediately.
Take a look. Good stuff. I particularly like the Reload Every extension, which should make it even easier for me to force a page refresh on those football (soccer) score pages, so that I have completely updated reminders of just how far Arsenal has fallen in such a short period of time.