SMRTR TechNov 16, 2025Hacker News

Browser fingerprinting via favicon

SMRTR summary

Researchers discovered a new tracking method called "supercookie" that exploits browser favicon caches to assign unique identifiers to website visitors. Unlike traditional cookies, this tracking persists through incognito mode, cache clearing, browser restarts, VPNs, and ad blockers, affecting all major browsers.

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