Add Sec-CH-Width#42453
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hamishwillee merged 5 commits intomdn:mainfrom Dec 21, 2025
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Thanks @hamishwillee ! One open comment for discussion but the rest should be good now. |
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Thanks very much @tunetheweb !
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…skeys-guide * origin/add-passkeys-guide: Clarify fetch() error handling behavior for Response (mdn#42497) Add code example to Closure glossary entry (mdn#42477) 42252 add new relative units ff release (mdn#42470) Remove duplicated word (mdn#42496) 42252 add new relative units (mdn#42469) TrustedTypes: Range.createContextualFragment() (mdn#42493) Fix CSS, HTML, and HTTP landing pages to match sidebar content and order (mdn#42460) TT: CSP trusted types/require-trusted... fixes (mdn#42461) Improve console output formatting in Recursion glossary (mdn#42478) Add Sec-CH-Width + consistency fixes (mdn#42453) webextensions/manifest.json/options_page: typo (mdn#42394) webextensions/api/tabs/onupdated: Fix section link (mdn#42393) fix: add missing closing parenthesis (mdn#42482) docs: mark srcData as required in bufferSubData (mdn#42483) docs(learn): remove invalid type attribute from video example (mdn#42479) Drop 'read-only' from role (mdn#42474) Fix: Update bufferSubData parameters to match WebGL 1 spec mdn#42315 (mdn#42411) chore: Replace links with `cssxref` macro in the learn area (mdn#42446)
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Description
A follow on from #42351 this adds the
Sec-CH-Widthin same way. I missed it originally as couldn't see it supported as missed the key point that it's only sent on images requests (add this to the docs toot to save the next person!)Motivation
Fix developer confusion: https://bsky.app/profile/ericportis.com/post/3m7oa4vo5fk2q
Additional details
https://www.tunetheweb.com/experiments/sec-ch-width/
Related issues and pull requests
BCD data: mdn/browser-compat-data#28690