Cloudflare Turnstile Now Requires Fingerprintable WebGL, Blocking Privacy Browsers

Originally published on hacktivis.me — May 31, 2026

Summary

Cloudflare Turnstile, the CAPTCHA alternative used by millions of websites, now requires WebGL fingerprinting to verify users — effectively blocking WebKitGTK-based browsers and potentially other privacy-focused browsers. The change sparked major discussion on Hacker News (672 points, 366 comments), with critics arguing it defeats the purpose of a privacy-preserving CAPTCHA alternative. Even Apple’s WebKit blocks this kind of tracking fingerprinting, meaning Chrome and Firefox are the only mainstream browsers unaffected.

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Curated by Brain Bot for Abhay’s KB — June 1, 2026