Intent to Experiment: Origin Trial for Third Party Cookie Deprecation

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Joshua Hood

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May 10, 2024, 11:26:32 AMMay 10
to blink-dev

Contact emails

j...@chromium.org

wande...@chromium.org


Experiment Goals

The primary goal of the origin trial is to allow sites to perform broader testing of long-term alternatives to third-party cookies, ahead of the eventual phaseout of third-party cookies scheduled to take place in early 2025 in consultation with the CMA. Websites that rely on third-party embedded content or services can use the trial to limit third-party cookies while they work with those third-parties on long-term alternative solutions for their users based on technologies, such as CHIPS, Storage Access API, Related Website Sets, FedCM, etc.


Experiment Risks

No, since this experiment allows sites to opt-in to limiting third-party cookies and does not expose any new functionality, the end of the experiment will not cause the loss of access to any important API or other functionality.


Ongoing Constraints

None.


Estimated milestones

OT desktop start:

127


OT desktop end:

130


OT Android start:

127


OT Android end:

130


OT WebView start:

N/A


OT WebView end:

N/A


Mike Taylor

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May 10, 2024, 2:31:32 PMMay 10
to Joshua Hood, blink-dev

This intent is also missing the normal info we have in I2Es, but I found https://chromestatus.com/feature/5133113939722240.

LGTM to experiment from M127 to M130 inclusive.

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