Is there a corresponding User-Agent reduction plan for Android WebView? On Tuesday, August 15, 2023 at 12:30:17 PM UTC-7 vict...@chromium.org wrote:
> Contact emails > > vict...@chromium.org, mike...@chromium.org > > Explainer > > https://github.com/WICG/client-hints-infrastructure#readme > > > https://github.com/WICG/ua-client-hints#explainer-reducing-user-agent-granularity > > Specification > > https://wicg.github.io/ua-client-hints/ > > Summary > > User-agent client hints (a set of `Sec-CH-UA-*`) aim to deprecate and > replace the User-Agent header to reduce the passive fingerprinting surface > we expose via HTTP requests. As we previously rolled-out user-agent client > hints on Windows, Mac, Linux, Chrome OS and Android, we intend to proceed > with shipping user-agent client hints on Android WebView. For overridden > user-agent strings, we only populate user-agent client hints if the > overridden user-agent contains the default user-agent. In this case, we > will only generate low-entropy user-agent client hints If users also > override the user-agent string through command-line. > > Blink component > > Blink>Network>ClientHints > > TAG review > > https://github.com/w3ctag/design-reviews/issues/320 > > TAG review status > > Closed. > > Risks > Interoperability and Compatibility > > Introducing User-Agent client hints in itself won't affect any page since > it's purely opt-in features. It helps us to improve the interoperability > between Chrome and WebView. > > Here is our proposed rollout plan in Chrome Stable channel > (Canary/Dev/Beta has been enabled 50%), with the understanding that if we > discover concerning breakage or regressions via health metrics or bug > reports we will pause the rollout: > > > Stage > > Duration > > Date > > Stable 1% (M116+) > > M116 stable release is shipping to 100% (a best guess) > > Aug 22, 2023 > > Stable 10% (M116+) > > ~2 weeks after previous stage > > Sep 5, 2023 > > TOT Default (M117) > > ~2 weeks after previous stage > > Sep 19, 2023 > > Stable 100% (M116=>M117) > > ~ Same business day as previous stage > > Sep 19, 2023 > > Gecko: Non-harmful on User-Agent client hints ( > https://github.com/mozilla/standards-positions/issues/202). > > WebKit: No signals ( > https://github.com/WebKit/standards-positions/issues/70). > > Web developers: Mixed signals (https://crbug.com/1430051 > <https://bugs.chromium.org/p/chromium/issues/detail?id=1430051>). We know > at least one site that uses user-agent client hints on Android WebView.. > > Debuggability > > No special DevTools support needed. The UA Client Hints headers will be as > debuggable as other request headers, through DevTools’ network tab. > > Will this feature be supported on all six Blink platforms (Windows, Mac, > Linux, Chrome OS, Android, and Android WebView)? > > Yes > > Notes: The existing flag UserAgentClientHint was already enabled for other > five platforms (Windows, Mac, Linux, Chrome OS and Android). > > Is this feature fully tested by web-platform-tests > <https://chromium.googlesource.com/chromium/src/+/master/docs/testing/web_platform_tests.md> > ? > > https://wpt.fyi/results/client-hints > > Flag name > > UserAgentClientHint > > Tracking bug > > https://crbug.com/1430051 > <https://bugs.chromium.org/p/chromium/issues/detail?id=1430051> > > Launch bug > > https://launch.corp.google.com/launch/4261345 > > Link to entry on the Chrome Platform Status > https://chromestatus.com/feature/5127746375647232 > -- 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+unsubscr...@chromium.org. To view this discussion on the web visit https://groups.google.com/a/chromium.org/d/msgid/blink-dev/c8b5492c-95da-4dd7-a618-f3a75a27b769n%40chromium.org.
