I have 2 PC's running Windows 7 with Firefox as my main browser. I have set up an account with Firefox and can log into my account on either PC with the same login credentials. I also have an eternal USB drive with Ubuntu latest version installed. Firefox is the default browser. When I try to log into my account, I get the "Unknown account" error. I have tried this many times, so I know that I have not made any mistakes transferring the data. I want to be able to sync my preferences, but cannot do so due to the error. I have even changed the password and verified that it worked on both Windows PC's but still get the error while in Ubuntu. Any other suggestions? thanks