That must be frustrating .... When you have received a message that your account has been locked, here's what to do : First wait 24 hours until trying again. If it fails again and you still have access to the email account, then please create a bugzilla.mozilla.org account and use this link to create a request. This is when your account is locked and you do not have access to the email account you created this Firefox account in, or the email is no longer accessible. I would recommend making a backup of your local profile first and then creating a new Firefox account. If there is still a problem, please feel free to reply to this thread and we can help you the best that we can.