Large-Scale Measurement and Real-World Mitigation of Web Browser Fingerprinting in the Wild
Summary
Mozilla's large-scale study measures browser fingerprinting in the wild using telemetry from around 25 million Firefox users, identifies a small set of high-impact metrics driving uniqueness, and evaluates protections rolled into Firefox 143. The work demonstrates a practical reduction in fingerprintability from 75% to 46% while preserving web compatibility, and releases aggregate data, analysis code, and an interactive test for public verification and further research.