i switched to opera..it is awesome!
Since Firefox isn’t a web site, but a program that runs on your computer, the problem is local to your setup and, possibly, the version you are running. Which version do you have? I have run both 3.6.8 and 4.0 beta 3 without any obvious problems of slowness.
My browser won’t respond to opera. Now some Barry White or Luther Vandross gets it all excited.