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Garry Tan
ea961e4faa
Three additions stacked into the existing applyStealth() init script
to close the visible automation tells that today push GBrowser users
into Google's /sorry/index captcha and similar:
T1 — Strip Playwright's automation default args:
--enable-automation (kills "Chrome is being
controlled" infobar)
--disable-popup-blocking, --disable-component-update,
--disable-default-apps (Patchright's list — each
is a documented tell)
Now centralized in STEALTH_IGNORE_DEFAULT_ARGS export, used by BOTH
launchHeaded() and handoff() (the headless → headed re-launch path).
D6 — Drop "GStackBrowser" UA branding suffix:
Real Chrome's UA ends `Safari/537.36`, not `Safari/537.36 GStackBrowser`.
The branded suffix was a high-entropy classifier for any vendor that
grep'd UA for known automation/test-browser strings. Branding still
lives in the wrapper .app name + Dock icon + tray — does not need
to leak via the UA string for the product to be "GBrowser." Resolves
the "looks like Chrome but identifies as GStackBrowser" contradiction
codex review #18 flagged.
T3 — Layer C init-script additions in stealth.ts:
1. Function.prototype.toString Proxy (must run first). Wraps every
patched getter / function in a WeakSet so they report
`function NAME() { [native code] }` at every recursion depth,
defeating the depth-3+ integrity check
(fn.toString.toString.toString().includes('[native code]')).
2. window.chrome.runtime / chrome.app / chrome.csi / chrome.loadTimes
restoration with full enum shape (OnInstalledReason, PlatformArch,
PlatformOs, etc.) + method bodies. Real Chrome ships these; their
absence is universally checked. Vendor research (gbrowser plan
deep-dive on Cloudflare + DataDome) confirmed both vendors probe
this shape directly.
3. Notification.permission aligned to 'default'. The existing inline
addInitScript already spoofs permissions.query({name:'notifications'})
to return 'prompt' — Notification.permission being 'denied' while
Permissions returns 'prompt' is a cross-source inconsistency that
detectors flag specifically.
4. Per-install hardware values via GSTACK_HW_CONCURRENCY /
GSTACK_DEVICE_MEMORY env vars (set by gbd's host_profile.go from
system_profiler + sysctl). Reporting real host values within the
Chrome shape avoids the cross-user GBrowser fingerprint cluster
that hardcoded defaults would create. Codex review #10 flagged
hardcoding as creating contradictions across Apple Silicon / Intel
/ UA-CH architecture.
5. Selenium 25-global cleanup + PhantomJS + NightmareJS + Watir +
Playwright (__pwInitScripts, __playwright__binding__) static-name
deletion. The inline block continues to handle the dynamic
cdc_/__webdriver/__selenium/__driver prefixes.
D7 (codex correction) kept: still do NOT fake navigator.plugins or
navigator.languages. Synthesizing those triggers MORE consistency
flags from modern fingerprinters than letting Chromium surface them
natively.
Test coverage:
- 15 new tests in stealth-layer-c.test.ts covering: launch-flag
exports, script structure, toString-Proxy installs first, every
spoof present, hardware values interpolated from input (not
hardcoded), Selenium global cleanup spot-check, no GStackBrowser
leak in stealth payload, backwards-compat exports preserved.
- All 8 existing stealth-webdriver tests still pass.
- All 2 existing browser-manager-unit tests still pass.
For GBrowser specifically: this is the gstack-side half of Phase 1 / T1
+ T3 + D6 in the anti-detection plan. The gbrowser repo's submodule
pointer bump will land alongside this.