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invisible_core

Pure config for a patched Firefox stealth profile - zero Playwright dependency.

seed → fingerprint profile → Firefox prefs, plus patched-binary download, proxy config, and geo/timezone resolution. Importing it does not start a browser, which is the point: the same fingerprint config backs an automation wrapper and a desktop profile manager without either depending on the other.

The shared foundation used by:

• invisible_playwright - the Playwright automation wrapper (InvisiblePlaywright).
• invisible_firefox - the antidetect profile manager (launches the binary directly).

The engine itself lives in firefox_antidetect_patch, a Firefox patched at the C++ source level so the fingerprint is produced by the browser instead of injected into the page.

pip install invisible-core

from invisible_core import generate_profile, translate_profile_to_prefs, ensure_binary

profile = generate_profile(seed=42)          # deterministic Bayesian fingerprint
prefs   = translate_profile_to_prefs(profile)  # dict of Firefox user prefs
binary  = ensure_binary()                     # path to the patched Firefox binary

Same seed → same fingerprint, every time.

What the fields actually mean

Which surfaces a browser fingerprint is made of, what each one gives away, and why consistency between them matters more than any single value, is written up at feder-cr.github.io/invisible_playwright. Those pages are about the problem, not about this package, and several of them record something we got wrong first. A few that document the exact fields this package generates:

• Pinning fingerprint fields - how pin= interacts with the Bayesian sampler, and which combinations it refuses because they don't occur on real hardware.
• How to make Linux and macOS report real Windows fonts - the font side of generate_profile, and why the family list is bundled rather than sampled from the host.
• Canvas and WebGL fingerprints, identical across OSes - why the same seed produces a byte-identical hash regardless of what's actually running underneath.
• Playwright timezone does not match the proxy IP - the surfaces this package's geo/timezone resolution has to keep in agreement.

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