Firefox is a widely-used web browser known for its emphasis on user privacy and security, offering a range of features to protect users' personal data and enhance internet safety. Key features include Enhanced Tracking Protection, which blocks social media trackers, cross-site cookies, and cryptominers in different modes to balance privacy with performance, and Do Not Track, which informs websites of users' tracking preferences. Firefox also provides robust cookie and cache management, secure password storage, and private browsing mode to ensure user data remains confidential and secure. The browser supports HTTPS-only mode to enforce secure connections and includes phishing and malware protection by checking sites against a list of unsafe sources. Users can further enhance security with add-ons like ad blockers and the Facebook Container, while Firefox's anti-fingerprinting approach blocks known fingerprinting requests, allowing legitimate uses like fraud prevention. Mozilla's dedication to privacy makes Firefox a reliable choice for users concerned about online tracking and data security.