LGTM1 On Tue, Aug 15, 2023 at 2:19 PM Victor Tan <victor...@chromium.org> wrote:
> 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 > <https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAJh4P7Hs_mYf2XdSU8M-vTsVuapefb%3D-AOMSh-dmObk8s75X_g%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > -- 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/CAOMQ%2Bw9-SN3YVceNYxk%2BwW1Q83iihOqoFN0mNGDMmCrnN5ht9Q%40mail.gmail.com.
