Clearcote Browser v0.1.0-pre.21 (Chromium 149.0.7827.114, Windows + Linux x64)

Clearcote Browser v0.1.0-pre.21 — Chromium 149.0.7827.114 (Windows x64 + Linux x64)

Network request-header hygiene under a fingerprint persona. Building on pre.20, the network layer no longer emits redundant cache-validation request headers on navigations and reloads when a fingerprint persona is active — matching what a real Chrome cold navigation sends.

Engine — cache-header hygiene (the browser fix)

Under a --fingerprint persona, Clearcote no longer stamps Cache-Control / Pragma request headers onto top-level navigations and reloads. A real Chrome cold navigation carries none; an automation stack would otherwise add them, and that difference is an easy tell. The effective cache mode is unchanged — only these outgoing request headers are suppressed, and the effect is invisible to page JS.

Scenario	Before	After (persona active)
Cold navigation	Cache-Control: no-cache, Pragma: no-cache	(none — matches real Chrome)
Reload	Cache-Control: max-age=0	(none)

With no persona (--fingerprint absent), stock Chromium behavior is preserved.

Downloads

Platform	Asset	SHA-256
Windows x64	clearcote-149.0.7827.114-windows-x64.zip	79b03d2d875b374970b2d54eae54f77070eba06b6a446dc163420854ec068c4d
Linux x64	clearcote-149.0.7827.114-linux-x64.tar.xz	5e7241a3e90033bc84f6079821829e99a6e6f0f6479eaa291d8b6590363aa292

Verify (don't trust — verify)

gpg --import clearcote-signing-key.asc
gpg --verify SHA256SUMS.txt.asc SHA256SUMS.txt     # Good signature, fpr CA96F185F96A693AEDB3AC1FCB00D851B7A86B0F
sha256sum -c SHA256SUMS.txt

Quickstart

pip install -U clearcote      # or: npm install clearcote  (>= 0.14.0)

from clearcote import serve
srv = serve(platform="windows")          # stealthy CDP endpoint
print(srv.cdp_url)                        # point Playwright/Puppeteer/browser-use at this
srv.close()

Caveats

• Pre-release / not stealth-validated. Evidence is open-source, adversarial auditor results, not published pass rates.
• Open config, public patch set. The args.gn and the great majority of engine changes ship as readable diffs in patches/. The network request-header refinement in this build ships compiled-in.
• All prior pre.20 surfaces remain (locale coherence, serve() stealthy CDP endpoint, MCP server, font coherence, mobile/Android persona, Edge coherence, TLS network persona, canvas bridge, Widevine/EME, humanized cursor). serve() ships in both the Python and Node SDKs; an official Docker image is available for one-command CDP-endpoint deploys.

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Open-source, de-Googled Chromium fork. The config is public and the patch set is open.