Fingerprint flags
Identity is controlled with Chromium command-line switches. Pass them as args to your launcher.
The seed model
Everything keys off --fingerprint=<seed>. The seed (an integer or any string) deterministically derives canvas, WebGL, audio, font and client-rect noise:
- Same seed ⇒ same identity across launches — a returning visitor.
- New seed ⇒ a fresh, plausible identity.
- Signals are derived per site (inspired by Brave's farbling), so the same seed is decorrelated across different domains rather than globally linkable.
All switches
| Flag | Value | Description |
|---|---|---|
| --fingerprint | <seed> | Master seed (int or string). Drives canvas, WebGL, audio, fonts and client-rect noise. Same seed ⇒ same identity. |
| --fingerprint-platform | windows|linux|macos | Spoof the operating system reported to the page (navigator.platform + UA-CH). |
| --fingerprint-platform-version | <v> | Platform version reported via User-Agent Client Hints. |
| --fingerprint-brand | Chrome|Edge|Opera|Vivaldi | Browser brand presented in the UA and UA-CH brand list. |
| --fingerprint-brand-version | <v> | Brand version string. |
| --fingerprint-gpu-vendor | <string> | Override the WebGL UNMASKED_VENDOR string. |
| --fingerprint-gpu-renderer | <string> | Override the WebGL UNMASKED_RENDERER string. |
| --fingerprint-hardware-concurrency | <n> | Value reported by navigator.hardwareConcurrency. |
| --fingerprint-location | <lat,lng> | Geolocation coordinates returned to the page. |
| --timezone | <IANA> | IANA timezone, e.g. America/New_York. Sets the JS timezone coherently. |
| --accept-lang | <langs> | Accept-Language, e.g. en-US,en. Sets both the server-side Accept-Language header and navigator.languages coherently (native Chromium switch; no ;q= weights). |
| --webrtc-ip | <ip> | WebRTC reports this IP (your proxy egress). The engine fabricates the server-reflexive candidate at it and sends no real STUN, so the real IP never leaks — not a relabel. |
| --fingerprinting-canvas-image-data-noise | — | Enable canvas image-data noise. |
| --disable-gpu-fingerprint | — | Disable the GPU/WebGL fingerprint spoof for this session. |
Examples
A full, coherent Windows identity:
bash
--fingerprint=acme-tenant-7 \
--fingerprint-platform=windows \
--fingerprint-brand=Chrome \
--timezone=America/New_York \
--fingerprint-hardware-concurrency=8A macOS identity with custom GPU strings:
bash
--fingerprint=42 \
--fingerprint-platform=macos \
--fingerprint-gpu-vendor="Apple" \
--fingerprint-gpu-renderer="Apple M2"Pin a location together with its timezone so geolocation and clock agree:
bash
--fingerprint=nyc-1 \
--timezone=America/New_York \
--fingerprint-location=40.7128,-74.0060Coherence matters more than any single value: keep platform, timezone, locale and GPU plausible together. See Architecture for how the engine keeps them consistent.