Never log in through a link sent via an unsolicited email or a suspicious "Login with Facebook" button on an unverified website.
Facebook’s desktop login page is not designed to delight. It is designed to be unambiguous, secure, and boringly efficient. In a world where dark patterns and cluttered sign-in forms are common, Facebook’s choice to keep the page almost stark is a deliberate one: reduce cognitive load, minimize error, and funnel users into the authenticated experience as quickly as possible. desktop facebook login page