QuackRep is a browser extension designed to help users avoid low-quality websites. By leveraging a comprehensive database of known quack sites, QuackRep identifies and warns users about potentially unreliable sources. When a user attempts to visit a site flagged by QuackRep, the extension displays a warning message, providing the user with an informed decision about whether to proceed. This proactive approach empowers users to take control of their online safety and avoid potential risks.