Chromium v155 — Release 1.2.4

capiumbrowser 1.2.4

A fingerprint-uniqueness release: every profile now looks like a different machine.

Highlights

• Per-profile, non-correlatable fingerprints. Each persistent profile now gets a
  distinct and stable render fingerprint — canvas, WebGL (incl. readPixels), and
  audio no longer hash identically across profiles on the same host. Previously the SDK
  forced render noise off, so two profiles on one machine shared byte-identical renders —
  a cross-instance correlation surface a detector can cluster over time. Now:
  • Render farbling is on by default (the engine's deterministic per-(seed,x,y)
    noise, which skips low-entropy images so trivial renders aren't perturbed). Same
    profile → same fingerprint every launch; different profile → different fingerprint.
  • launch_persistent_context / launchPersistentContext derive a stable per-profile
    seed (from a persisted, random, never-hardware-derived per-machine value + the
    profile directory) when you don't pass one, so no two profiles collide and each keeps
    one identity across launches. An explicit seed= still wins; non-persistent
    launch() keeps an ephemeral random seed.
  • Applies to desktop and mobile (android/ios) personas alike.
• What stays fixed on purpose. Identity fields that must stay coherent are not
  randomized: the timezone follows the persona/UA, and OS/GPU/screen/fonts remain
  internally consistent per persona. Uniqueness comes from the render surfaces and the
  per-profile seed, not from breaking coherence.
• Clean upgrades. Upgrading removes superseded browser installs instead of leaving
  stale capium-* directories behind.

Opting out

Need byte-exact canvases (e.g. pixel-diffing your own UI)? Pass
args=['--fingerprint-noise=false'] to restore the previous behavior for that launch.

Engine

No browser change — SDK-only release on the same Chrome 155.0.8059.84 engine,
browser revision 2, as 1.2.2/1.2.3 (Windows reports 155.0.8059.85; macOS and Linux
report 155.0.8059.84).

Install / upgrade

pip install -U capiumbrowser        # Python
npm install capiumbrowser@latest    # Node

The SDK automatically fetches the matching browser build for your OS on first launch.