Firefox updated to 1.0PR or Preview Release. Looks cool until you read the part about none of the old extensions working until they are updated. I love Firefox, but this happened at 0.8 too and it's getting really annoying. I won't update until all of my extensions do. Thunderbird updated to 0.8 and all of my extensions but one work. I see no funcional differences at all although the changes are listed on the site.