Common Browser
A consumer browser extension that quietly rounds the floating-point and audio signatures your browser leaks and explains, in plain English, what every site just learned about your machine.
Privacy-conscious people who don't trust cookies-only protections
- One-click alignment of Math.tanh, CSS trig, and Web Audio compressor outputs with the most common OS profile
- Weekly plain-English 'footprint report' showing what each visited site could fingerprint
- Per-site allowlist so you can relax protection on banks and email
- Cross-browser sync so the protection follows you across Chrome, Firefox, Safari
Chrome 148 silently introduced the tell across Math.tanh, every CSS trig function, and the audio compressor, exposing hundreds of millions of users to a new tracking surface they don't even know exists.
Hacker News discussion of the Chromium 148 Math.tanh/CSS trig/audio tell received 220 points and 108 comments (per idea source), with Scrapfly post-confirming the bit-level leak; privacy-extension category consistently draws strong install counts (e.g. Fingerprint Protector, Trace-like tools on Chrome Web Store).Your Browser Does Math Differently on Every OS, and Anti-Bot Systems Read the Bits ↗Fingerprint Protector - Chrome Web Store ↗
Crowded niche: Fingerprint Protector, CthulhuJs, and Brave/Tor/Firefox already ship general anti-fingerprinting; the Scrapfly article itself documents that fixing this requires per-call-site routing across JS, CSS, and Web Audio with Mac scalar libsystem_m vs Accelerate disambiguation - high bar for a third-party extension on top of Chromium defaults.Your Browser Does Math Differently on Every OS, and Anti-Bot Systems Read the Bits ↗CthulhuJs (Anti-Fingerprint) - Chrome Web Store ↗
Privacy extensions are notoriously free-funded; existing anti-fingerprint tools are free, so willingness to pay is weak; addon pricing playbooks for browser extensions highlight trial/freemium models, but proven paid conversion in this category is low.Lifetime Deal vs Subscription for Browser Extensions ↗Fingerprint Protector - Chrome Web Store ↗
The leak is specific to Chrome 148+ V8/std::tanh and Apple Silicon Accelerate vs scalar libsystem_m routing - Google could revert in a minor Chromium release, and any fixed vendor could re-break it, capping durable differentiation.Your Browser Does Math Differently on Every OS, and Anti-Bot Systems Read the Bits ↗
Scrapfly's writeup itself states that naive JS Math.tanh spoofing creates detectable inconsistencies (CSS trig and Web Audio compressor still leak via Accelerate/scalar paths, ARM vs x86 FMA drift), making a faithful spoof requires per-call-site routing across MAIN world, page world, Blink CSS, and Web Audio DSP - non-trivial to ship and verify.Your Browser Does Math Differently on Every OS, and Anti-Bot Systems Read the Bits ↗