When you create a Mozilla Account you use an valid existing email address you have. If you put in a @mozilla.com email that does not exist {have seen people do this in past by mistake) as your own then you will not be able to use that Mozilla account. You need a Mozilla Account to post here as your tangolima048 mozilla account used to post this thread has a @gmail.com email address. Any other Mozilla Account you create you should get a email sent to the email you used when you create a new Mozilla Account to activate it. Btw there are no @mozilla.com or @mozilla.org email addresses for the general public. Only for people who work for Mozilla in a capacity that warrants getting one for work and they have to give it up when they leave. Also It has been called Mozilla Accounts since early November 2023 as it was formerly know as Firefox Accounts. https://support.mozilla.org/en-US/kb/firefox-accounts-renamed-mozilla-accounts edit: also you need to be more clear on what you mean by "unlock" ?