Open Source JavaScript Browser Fingerprinting Software

Nacre is a free and open-source web browser for Windows, built on Chromium (Electron). Tor is on by default, with bridge support. Each workspace has its own cookies and storage. Ads and trackers are blocked locally, and phishing checks don't send the sites you visit anywhere. No account, no sync, no telemetry. Nacre 1.0 is a beta: the installer is not signed yet and some protections are partial. If your safety depends on anonymity, use Tor Browser.

This project is a proof of concept that any website can identify and track you, even if you are using private browsing or incognito mode in your web browser. Many people think that they can hide their identity if they are using private browsing or incognito mode. This project will prove that they are wrong.

ThumbmarkJS is a free, commercially usable, open-source browser fingerprinting library. With over 1 million monthly NPM downloads it is the worlds fastest growing browser fingerprinting library - currently processing roughly 1 billion identifications per month. Using signals like canvas, audio, fonts, and WebGL, ThumbmarkJS generates a stable, persistent fingerprint with ~80% uniqueness that works across sessions, even in private/incognito browsing or after a cleared cache. Install client-side only via CDN or npm, or connect the optional hosted API to boost uniqueness to ~99%.