Currently, we haven't confirmed the public plan for user-agent reduction on WeView. We won't do user-agent reduction before completing roll-out user-agent client hints.
Victor On Tue, Aug 15, 2023 at 5:13 PM Bhanu Vattikonda <vbh...@google.com> wrote: > 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/CAJh4P7Hs_mYf2XdSU8M-vTsVuapefb%3D-AOMSh-dmObk8s75X_g%40mail.gmail.com.
