What kind of message was it? A message informing you that some device logged into your Firefox Account, but it wasn't you?

As the first step, you could consider changing your password:

https://accounts.firefox.com/

It was one telling me i successfully confirmed my account with mozilla but i didnt set one up till ten minutes ago.

Hi HeatherW.1969, I should mention that these are two different systems, different logins:

• Firefox Account (more info: Access Mozilla Services with a Firefox Account)

• Mozilla Support website account

Hopefully those will be unified someday. But for now, check for different emails from each system.

See also:

• https://support.mozilla.org/en-US/kb/firefox-monitor
• https://support.mozilla.org/en-US/kb/firefox-monitor-faq
• https://blog.mozilla.org/firefox/firefox-monitor-take-control-of-your-data/