SecureLogin is decentralized authentication protocol. It is not a password manager and cannot be used with any website yet: it only works with websites that *support* this protocol and have SecureLogin button.
Classic passwords/2FA are poorly designed, hard to backup and inconvenient to use.
SecureLogin is all-in-one solution that creates a cryptographic private key from your email and master password to sign in everywhere and helps you to forget about passwords.