ok guys, this Lovely Lion has a question.

I have Chrome version 12 & Mozilla version 3.15 installed

Now if I update them respectively to Chrome version 15 and Mozilla version 8, would:

1. all cookies, cache, bookmarks be lost or available in the upgraded version
2. is there anything I need to take care of while updating
3. Is it ok to update to latest version, are there any issues with them? or go for latest - 1 version


PS: i'm using offline installers to update


Grr