Ever since upgrading to Firefox 3 on both my Mac Pro and my Mac Book Pro I am repeatedly getting a rainbow spinning pinwheel. Firefox will work for 2-5 minutes and then I get the rainbow spinning pinwheel for about a minute then Firefox will work for 2-5 minutes then the spinning wheel again. This is how its been since I upgraded to Firefox 3. I never had this problem with Firefox 2. This is very frustrating because Firefox is my preferred browser. The extensions I have installed are: AdBlock Plus ColorfulTabs CustomizeGoogle Foxmarks Bookmark Synchronizer Tab Mix Plus PDF Download TagSifter 1Password I have repaired disk permissions. Any ideas?