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Every web scraper hits the same wall: Cloudflare.

You rotate IPs. You spoof headers. You use Playwright's stealth plugin. And Cloudflare still blocks you — because it checks things no JavaScript library can fake: WebGL renderer fingerprint, font enumeration,

audio context, hardware concurrency, Canvas2D image data, WebRTC local IPs, and more.

BrowserHand takes a different approach — C++ hooks at the Chromium binary level.

Instead of patching JavaScript objects at runtime (which Cloudflare can detect), we patched the browser engine itself. 49 hooks across 12 subsystems:

GPU: Forced WebGL vendor/renderer strings at the driver layer

Fonts: Controlled which system fonts the browser exposes

Audio: Faked audio context fingerprint at the OS level

Network: Spoofed WebRTC IPs before the JS runtime could read them

Canvas: Injected noise into Canvas2D/SVG fingerprinting reads

Timing: Normalized JS timer precision to match real hardware profiles

The result: same browser, same IP, same everything — but…