Port Authority is a free and open-source Firefox addon designed to enhance web privacy by blocking various forms of port scanning and tracking scripts. It effectively prevents unauthorized attempts to gather information about your network by blocking HTTP, HTTPS, WebSocket, FTP, and other types of port scans. The addon can send browser notifications when it successfully blocks such activities, ensuring users are informed of potential threats. Additionally, it offers a whitelist feature to allow trusted domains while maintaining robust security on others.

With a core functionality of around 200 lines of well-commented code, Port Authority is easily auditable, making it accessible for developers and privacy-conscious users alike. The addon does not store or transmit personal data, emphasizing user privacy. For those concerned about their online security, Port Authority is a valuable tool that provides peace of mind while browsing.