How did you get notification? Firefox doesn't send out such emails. Also Firefox accounts are just for forum posting it doesn't do emails.

Firefox indicated that my Firefox account was hacked. Please cancel my account. I haven't used Firefox in years.

Was this Firefox Monitor?

https://support.mozilla.org/en-US/kb/firefox-monitor https://support.mozilla.org/en-US/kb/firefox-monitor-faq https://monitor.firefox.com/

How did you get notification? Firefox doesn't send out such emails. Also Firefox accounts are just for forum posting it doesn't do emails.

Firefox is a web browser. Firefox Accounts as mentioned to you multiple times now is not only used on on support.mozilla.org as you can see in https://support.mozilla.org/en-US/kb/access-mozilla-services-firefox-account

Please inform me that you have closed/cancelled my Account