Cross-browser tracking vulnerablity in Tor, Safari, Chrome and Firefox - FingerprintJS
In this article we introduce a scheme flooding vulnerability, explain how the exploit works across four major desktop browsers and show why it's a threat to anonymous browsing. DISCLAIMER: FingerprintJS does not use this vulnerability in our products and does not provide third-party tracking services.
https://fingerprintjs.com/blog/external-protocol-flooding/?utm_source=tldrnewsletter