Firefox has been crashing several times a day since upgrading to 3.5

Report ID Date Submitted
58d95afc-43ae-4d5f-9301-6e8a82090703 7/3/2009 4:56 PM
97389100-4361-4643-9d86-ec9802090703 7/3/2009 3:55 PM
713e3e58-ffd5-4e88-a8be-f809c2090703 7/3/2009 3:54 PM
54fe73d5-64be-45fb-938a-1088a2090703 7/3/2009 2:54 PM
fe8269be-e9a3-407a-a6ac-22ab72090703 7/3/2009 2:31 PM
79c18e5c-1e8e-4bff-a524-a91182090703 7/3/2009 2:20 PM
93c869c9-7fff-4fc7-93eb-a7cbb2090703 7/3/2009 12:37 PM
f216a52b-6e08-449e-a6a4-040472090702 7/3/2009 12:00 PM
7c45097a-b01d-4b78-99a6-683c92090702 7/2/2009 1:11 PM
638b2b93-3cc6-4668-8029-4f6a52090701 7/2/2009 10:57 AM
95a344c1-c7e4-47a1-9825-7b75c2090701 7/1/2009 4:23 PM
558dd710-cbb6-4eed-9e02-d36112090701 7/1/2009 3:26 PM
6a9a2753-515b-44ec-bff8-777682090701 7/1/2009 2:05 PM

Safe mode? Yes
Add-ons and plugins disabled? Yes
Any change? No!

I want to know how to downgrade without losing my preferences, passwords, etc