fortress

One browser engine to rule them all

Stealth Chromium engine · v3 (Chromium 153)

Fortress is a stealth Chromium engine that stops your scrapers and browser agents from getting blocked, with one line of code change. Bot detectors flag automation by reading the browser fingerprint; Fortress corrects that fingerprint inside Chromium's C++, so the browser presents as an ordinary Chrome install. Scrapers finish their runs, agents reach the pages they were sent to, and CreepJS, Sannysoft, BrowserScan, and live Cloudflare Turnstile all read it as human. Point your existing Playwright or Puppeteer at Fortress over CDP, and nothing else in your code changes. With v3, every launch is a different coherent machine, so a fleet of sessions looks like a crowd of real users.

Headless, on datacenter IPs, with no proxies, Fortress served 86.4% of 92 protected pages; the next best stack (Camoufox) served 74.5%.

_{Blink · V8 · BoringSSL patched in-tree · ANGLE / D3D11-backed WebGL · JA3/JA4-coherent TLS · monthly upstream rebase · reproducible, gauntlet-gated releases}

81 single-surface C++ patches

0% CreepJS headless / stealth

48/48 distinct across a 64-clone fleet

[native code] across every realm

_{Unedited capture of the Fortress binary in a real window: it clears a live Cloudflare challenge, turns bot.sannysoft.com all green, then reads BrowserScan “Normal”. Reproduce with tools/gauntlet.py.}