A walkthrough of the individual evasions in puppeteer-extra-plugin-stealth: the webdriver flag, chrome.runtime, the permissions contradiction, plugins and mimeTypes, the WebGL vendor, and iframe.contentWindow, with what each patch fixes and where it leaks.
Why property-patching stealth is a losing game: detectors test for the patch itself, for consistency across surfaces, and for signals the plugin never touches. Traced through the toString leak, the CDP Runtime.enable signal, and cross-signal consistency checks.
Traces how Camoufox patches Firefox at the C++ level to inject fingerprints, why it rides Juggler instead of CDP, how config flows from Python into the engine through environment variables, and where the Firefox base still leaks.
Traces the undetected-chromedriver lineage into its successor nodriver: the cdc_ binary patch, the navigator.webdriver flags, dropping the chromedriver binary and Selenium for raw CDP, and why each layer still gets caught.
Traces the architectural fork in browser stealth: recompiling a patched Chromium or Firefox versus injecting JavaScript at runtime, and why engine-level edits win on detectability but lose on the economics of keeping up with the upstream release train.
Traces how the browser separates real input from fabricated input: the isTrusted flag and its unforgeable layout, the prescribed pointer and mouse event sequence, and why CDP-injected events that read as trusted still leak through timing and missing telemetry.
Traces how a single browser-automation stealth patch moves through its life: a signal is found, the patch hides it, the patch itself becomes a fingerprint, and a new signal replaces the old one. With real examples and the economics of the treadmill.
A deep dive into uTLS: how the Go library forges a chosen browser's ClientHello through ClientHelloID parrots and handshake control, why Go's crypto/tls is otherwise easy to fingerprint, and where the mimicry still leaks.
How detectors catch tools that forge a perfect browser ClientHello: the mismatch between the TLS layer and the HTTP/2 frames above it, library-specific residue, header order, and version drift.