https://support.mozilla.org/en-US/kb/how-do-i-opt-out-firefox-monitor
How do I opt out of Mozilla Monitor? | Mozilla Monitor Help
For instructions on how to stop notifications about breaches involving your email address, check this article.
how do iopt outmozilla monitorhelp
https://bugzilla.mozilla.org/show_bug.cgi?id=1078607
1078607 - SUMO - support monitor on support1.webapp.phx1.mozilla.com is CRITICAL: (Service Check...
https://blog.mozilla.org/blogarchive/blog/2019/06/04/firefox-now-available-with-enhanced-tracking-protection-by-default/monitor_mobiledash_en/
Monitor_MobileDash_EN - The Mozilla Blog (Archived)
mozilla blogmonitorenarchived