Intent to Extend Experiment: User-Agent Reduction Deprecation Origin Trial
Ari Chivukula
Contact emails
ari...@chromium.org, vict...@chromium.org, mike...@chromium.org
Original I2E
https://groups.google.com/a/chromium.org/g/blink-dev/c/-2OW78CB1-A/
Origin Trial Overview
https://docs.google.com/document/d/1d-K43rzfDGxNM4H6Yzh5lV08KJwLsae06i4Q0A8snME/edit
Client Hints Infrastructure Spec
https://wicg.github.io/client-hints-infrastructure/
Origin Trial
https://developer.chrome.com/origintrials/#/view_trial/2608710084154359809
Summary
We propose extending the User-Agent Reduction Deprecation origin trial, which allows developers to continue to receive the full User-Agent string. We decided to extend the experiment based on ecosystem feedback and a bug that was identified in the implementation of the origin trial for user agent reduction and user agent reduction deprecation. We are planning to extend the end date from March 23, 2023 (M112) to August 8, 2023 (M115). We are in the process of resolving the bug and the information can be found here.
Blink component
Motivation
We received feedback from the ecosystem that it would be helpful to extend the origin trial. The User-Agent Reduction for Phase 6 just reached 100% on May 12th and this gives additional time to evaluate the impact of those changes. In addition, this bug may have impacted the ability of developers to prepare their sites for the end of the Deprecation Trial, and so extending the Deprecation Trial to fix the bug in M115 ensures additional ecosystem support.
TAG review
https://github.com/w3ctag/design-reviews/issues/640 (resolved w/ concerns)
Risks
The risks are minimal here; this just extends the ability to send the legacy User-Agent header for 3 additional milestones.
Debuggability
DevTools supports debugging HTTP headers, so no special tooling is needed.
Is this feature fully tested by web-platform-tests?
Tests will be added once the bug is resolved to verify.
Tracking bug
Link to entry on the Chrome Platform Status
Rick Byers
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