In my search for the perfect firefox setup, last night i found a number of extensions and themes, some good, some bad, a lot that didnt work with 1.5 and a new theme for windows xp too!!
This extension speeds up firefox loading times and improves its performance as well as speeds up page loading times. I had an instant performance increase in both startup and page loading.
Sage is a RSS reader extension to firefox, so i can finally see newly updated feeds within firefox. It still needs a bit of tweaking, Im going to makea few suggestions to the sage team about it, but otherwise great.