Malicious third-party extensions often change your default search engine, track your browsing history, inject unwanted advertisements into every website you visit, and steal saved passwords from your browser keychain. Manual Methods to See Mutual Friends Safely
: It allowed users to "Reveal Friends" of a profile even if that person had their friend list set to "Only Me". Current Status
✅ Download your official Facebook archive (Settings → Your Information → Download Your Information). That shows you actual data Facebook stores.