Facebook has begun supporting passkeys, a next-generation authentication method. Passkeys are unique digital keys stored on your device (phone, computer, or security key). They use your device's built-in security (biometrics like your fingerprint or face scan, or a PIN) to log you in. Passkeys are resistant to phishing and are far more secure than any password-based system.
Facebook flags logins from unrecognized IP addresses or locations. When multiple people from different countries attempt to log into the same account, Facebook instantly locks the account for suspicious activity. facebook login password bugmenot