Intent to Prototype: Third-party origin trials

[Jason Chase]

Contact emails cha...@chromium.org,

rodne...@google.com,

experimen...@chromium.org Explainer Origin trials are a Chrome-specific experimentation framework, not a web platform feature.

https://github.com/GoogleChrome/OriginTrials/blob/gh-pages/explainer.md Design docs/spec https://docs.google.com/document/d/1xALH9W7rWmX0FpjudhDeS2TNTEOXuPn4Tlc9VmuPdHA/edit TAG review Origin trials are a Chrome-specific experimentation framework, not a web platform feature. Summary Origin trials can now be enabled by embedded scripts, based on tokens matching their third-party origin. Previously, it was possible for scripts to enable origin trials, but only when the token matches the origin of the containing document. Motivation Allow third-party providers to experiment more effectively via origin trials. As in the origin trials explainer, the goal is to encourage broad participation and feedback from web developers, while preventing burn-in of features or hampering iteration. Origin trials currently require opt-in/attribution for first-party origins, which causes undue friction for third-party providers. For some features, third-party providers are often in the best position to experiment and provide feedback. Risks

Interoperability and Compatibility Origin trials are a Chrome-specific experimentation framework, not a web platform feature. Firefox: No public signals Edge: No public signals Safari: No public signals Web developers: No signals Security It is already possible for embedded scripts to enable an origin trial on behalf on the containing page. This feature makes it more convenient, but doesn't provide any additional capability.

Will this feature be supported on all six Blink platforms (Windows, Mac, Linux, Chrome OS, Android, and Android WebView)? No Origin trials are not supported on Android WebView. Is this feature fully tested by web-platform-tests? No Origin trials are a Chrome-specific experimentation framework, not a web platform feature. Link to entry on the Chrome Platform Status https://www.chromestatus.com/feature/5691464711405568

This intent message was generated by Chrome Platform Status.

[Yoav Weiss]

Thanks for working on this! This will open an important use-case for origin trials!

For future reference, I don't think that an Intent was required here, as this is not a web platform feature. A PSA might've been better.

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