Intent to Ship: Sec-CH-UA-Full-Version-List user-agent client hint
Victor Tan
Contact emails
vict...@chromium.org, mike...@chromium.org, jadek...@chromium.org
Specification
https://wicg.github.io/ua-client-hints/#sec-ch-ua-full-version-list
Summary
The Sec-CH-UA-Full-Version-List request header field gives a server information about the full version for each brand in its brands list.
Blink component
Motivation
As raised in UA-CH Issue 196, Sec-CH-UA-Full-Version can be considered too tightly bound to the primary brand in the brand list, especially for embedders. In order to prevent classes of bugs where a site might think the fictional “Hamburger” browser is not up to date (because its version scheme is different, and lower than Chromium’s), we propose to expose the full version of each brand in the brand list, by requesting this new client hint.
Here’s what that would look like:
Sec-CH-UA-Full-Version-List: “Hamburger”; v="92.0.902.73", "Chromium"; v="92.0.4515.131", "?Not:A Browser"; v="3.1.2.0"
Eventually, it will make sense to deprecate and remove Sec-CH-UA-Full-Version (assuming usage allows us to do so). But we do not intend to do that until we ship its replacement.
Initial public proposal
https://github.com/WICG/ua-client-hints/issues/196
TAG review
https://github.com/w3ctag/design-reviews/issues/640
TAG review status
Pending (there’s a pre-existing review, and this hint came up in the review process as feedback from other browsers, so the TAG is aware of it).
Risks
Interoperability and Compatibility
This is a new hint, so it should not create compatibility issues.
Edge: This hint was added to solve a bug (maybe a feature request?) by Edge folks.
Gecko: Non-harmful (https://mozilla.github.io/standards-positions/#ua-client-hints)
WebKit: Requested through email
Web developers: No signals
Debuggability
No special DevTools support needed. It should just work™.
Is this feature fully tested by web-platform-tests?
Yes. https://chromium-review.googlesource.com/c/chromium/src/+/3256910
Flag name
UserAgentClientHintFullVersionList
Requires code in //chrome?
False
Tracking bug
https://bugs.chromium.org/p/chromium/issues/detail?id=1249246
Launch bug
https://bugs.chromium.org/p/chromium/issues/detail?id=1260418
Link to entry on the Chrome Platform Status
Victor Tan
Yoav Weiss
--
You received this message because you are subscribed to the Google Groups "blink-dev" group.
To unsubscribe from this group and stop receiving emails from it, send an email to blink-dev+...@chromium.org.
To view this discussion on the web visit https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAJh4P7FdCmHAA-8b1CH_So%3D2Fur2dZO8SKNetWmEetQ1KcP9_A%40mail.gmail.com.
Mike West
To view this discussion on the web visit https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAL5BFfWGKQx9ECJSFwAz9ejvmz36vp%2B1jrCDrYAAcFP_Pk%2BrYg%40mail.gmail.com.
Chris Harrelson
To view this discussion on the web visit https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAKXHy%3DeY0O6EPzLqJCUjLWsCmMULg6wC7Tf6X8S-8KOQKoRfYg%40mail.gmail.com.