I run into a similar problem here too. I've used my Firefox account in the US for years, but when I came to China and try to log into the same account, it seems to have another new Firefox account created with the same email address. I don't have anything I saved in the old account anymore, and never had a chance to log back in my old account.

I'm still confused if there were two accounts for use in US and China accordingly or there was only one account with everything wiped out because of area change.....