I tried to setup Firefox on my Mac Pro initially. I wasn't patient enough for the confirmation email. Then, it just won't sync. The other day, I turned on my Laptop and setup Firefox on it. It worked perfectly. It syncs. Then, I tried to add my Mac Pro to the sync, but it just doesn't work. Firefox sent out emails warning me that some one tried to login, if it was not me, I should reset the password. I don't know what to do for that message, since it was me, and the message doesn't have a button to confirm that it is me. I sometimes just trashed messages. Once or twice I tried to reset the password. But none helped. Hope this helps. Thank you very much for your time and effort in this matter. ZP