Your Browser Does Math Differently on Every OS, and Anti-Bot Systems Read the Bits

Global Science Mon, 13 Jul 2026 15:19:01 GMT Moderate confidence — 64/100

Fingerprinting is usually about canvas, WebGL, fonts, audio.
There is a quieter signal, and it lives in the last bits of a number.
Run this in any console:Math.tanh(0.8) // 0.6640367702678491 genuine Linux Chrome (glibc) // 0.664036770267849 genuine macOS Chrome (libsystem_m) // 0.6640367702678489 genuine Windows Chrome (UCRT) That is not a constant.

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Fingerprinting is usually about canvas, WebGL, fonts, audio.
There is a quieter signal, and it lives in the last bits of a number.
Run this in any console:Math.tanh(0.8) // 0.6640367702678491 genuine Linux Chrome (glibc) // 0.664036770267849 genuine macOS Chrome (libsystem_m) // 0.6640367702678489 genuine Windows Chrome (UCRT) That is not a constant.

Sources: Scrapfly