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User-Agent Client Hints (UA-CH) #5235

Llbe opened this issue Jan 15, 2020 · 3 comments

User-Agent Client Hints (UA-CH) #5235

Llbe opened this issue Jan 15, 2020 · 3 comments


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Llbe commented Jan 15, 2020

AFAIU, the plan from Google is to freeze the User-Agent header value (with some support from other vendors) and introduce new client hint headers in their place, along with a new JS API that can be used instead of navigator.userAgent in order to target specific browser versions etc.

Intent to Deprecate and Freeze: The User-Agent string:!msg/blink-dev/-2JIRNMWJ7s/yHe4tQNLCgAJ

Intent to Ship: Client Hints infrastructure and UA Client Hints:!msg/blink-dev/A4wxFpvqUfA/g7iccl9ICgAJ

Spec on JS API:

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kiding commented Jun 3, 2020

Google's plan to freeze the User-Agent string has been postponed to "at least 2021." w3ctag/design-reviews#467 (comment)

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adriaanvanrossum commented Feb 7, 2021

Client Hints are implemented in Google Chrome (at least v88):


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pointydev commented Jul 13, 2021

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