111b725e8c
Route authenticated HTTP/HTTPS proxies through the browser's native proxy authentication only on binaries that support it, resolved per platform and binary version via a capability gate (sibling to the existing viewport and window-geometry gates). Older binaries, including the free macOS and ARM builds, fall back to the standard Playwright proxy path instead of emitting credentials the binary cannot parse, so authenticated proxies keep working on macOS and ARM instead of silently failing. Applied across the Python, JavaScript, Puppeteer, and .NET wrappers.