AmIUnique is a Firefox extension designed to help users understand and track their browser fingerprint over time. This free tool allows users to monitor changes in their fingerprint, providing a personalized timeline that highlights any alterations since the extension was installed. Users are notified immediately when a change is detected, enhancing their awareness of online privacy. Furthermore, the developers plan to introduce new features aimed at improving anonymity against fingerprinting in future updates.

The project is driven by the mission of AmIUnique.org, which has gathered over 100,000 fingerprints to analyze the diversity and temporal evolution of browser fingerprints. This extension addresses the gap in understanding how fingerprints change over time, encouraging users to contribute to the data collection for better insights into this important aspect of online security. Users of NoScript should whitelist the site to ensure proper functionality.