4.4/5 Why it’s top: Open-source and privacy-audited. Perfect for users searching for “facebook friend mapper extension download top for Firefox.”
Google immediately removed the extension from the Chrome Web Store for violating developer policies and user privacy.
It historically worked by finding a single mutual friend with a target user to "map" the rest of their hidden connections. Facebook has since updated its API and privacy protocols to block these types of unauthorized scans. Legitimate Alternatives