The non-stealth navigation path hardcoded sec-ch-ua-platform "Linux" and a
fixed sec-ch-ua using Chrome 149's GREASE token, regardless of the selected
profile. With the default Windows Chrome 143 profile that meant a Windows UA
and navigator.userAgentData traveling with a Linux sec-ch-ua-platform header
and mismatched brands, a cross-layer inconsistency a site can check at a
glance. Derive both headers from the profile User-Agent using Chromium's
per-major GREASE algorithm, so the HTTP client hints agree with the JS surfaces.
SGavrl
f7b3ff5d75