Re: [w3ctag/design-reviews] User-Agent Client Hints & UA Reduction (#640)

> In WICG/ua-client-hints#221, Sec-CH-UA-Platform was changed to a default, low-entropy hint (which was implemented in Chrome 93 and should ship to the stable channel later this month). 

That the set of sent-by-default `Sec-CH-UA-*` headers has grown already does not look good for the notion that UA Client Hints is opt-in.

Header compression makes the number of bytes fewer than the obvious HTTP/1.x length, but even with compression, there's non-zero overhead to sending the default UA Client Hints to every site.

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Received on Monday, 13 September 2021 14:35:28 UTC