Hi I an having a variety of fairly random problems with 4.0: Google search drop-down selections not selecting, Netflix streaming movies crashing (sometimes causing my entire system to freeze irrevocably), very slow page loading, webpages simply not loading, etc, etc. None of these problems occurred with 3.6, so I'd like to roll back at least until 4.x becomes more stable. 1) Where do I find the last 3.6.x release for download? 2) How do I ensure that my settings/preferences will be present in the "new" 3.6 install? 3) Do I need to do anything to ensure that my addons are compatible with 3.6? Regarding 4.0: 4) My version shows as 4.0. Does this mean no changes have been made since the original 4.9 release, or does Mozilla ever release any small automatic upgrades or hotfixes that don't advance the version number? 5) What is the difference between addons and extensions? I don't think I have any extensions - is there a way to check? 6) Is there a list of addons or extensions that are known to have problems with 4.0? Thanks, Chris