[danburzo]

I haven’t followed Client Hints closely, but a change[1] in RFC 9842 internal drafts “removed specific features to be defined in other specifications”, and the `DPR` header ended up as `Sec-CH-DPR` in the nascent Responsive Images Client Hints spec[2].

[1] https://datatracker.ietf.org/doc/html/draft-ietf-httpbis-cli... [2] https://wicg.github.io/responsive-image-client-hints/#sec-ch...