# How does Firefox Monitor know my information was hacked during a particular breach?
Firefox Monitor gets its data breach information from a publicly searchable source, Have I Been Pwned. If you don’t want your email address to show up in this database, visit the opt-out page.
Yes.
# How does Firefox Monitor know my information was hacked during a particular breach?
Firefox Monitor gets its data breach information from a publicly searchable source, Have I Been Pwned. If you don’t want your email address to show up in this database, visit the opt-out page.
https://support.mozilla.org/en-US/kb/firefox-monitor-faq