[blink-dev] Intent to Extend Experiment: Cookie Deprecation Label
Nan Lin
Contact emails
lin...@chromium.org, jka...@chromium.org
Explainer
https://github.com/privacysandbox/tpcd-labeling/blob/main/cookie_deprecation_labeling_explainer.md
https://developer.chrome.com/en/docs/privacy-sandbox/chrome-testing
Summary
The cookie deprecation labels are useful for developers to evaluate and optimize deployments of the Privacy Sandbox APIs, and we want to avoid disruption while we engage with the industry to gather feedback on an updated roadmap for these technologies. Therefore we are asking to extend the current set of labels for three more milestones.
Link to “Intent to Experiment” blink-dev discussion
https://groups.google.com/a/chromium.org/g/blink-dev/c/NJrU4AQ5m_I/m/l-SaSj9MEQAJ
Goals for experimentation
Continued deployment and evaluation of Privacy Sandbox Ads APIs.
Experimental timeline
This feature was previously approved to run up until Chrome 138.
We would like to extend this for Chrome 139 through 141, inclusive.
Any risks when the experiment finishes?
Minimal, the cookie deprecation labels are only available for a subset of users and must be requested. Embedded services that will need to detect third-party cookie availability in Chrome after the experiment ends can utilize Storage Access Headers instead of relying on these labels.
As new clients are ineligible for the experiment, the percentage of clients that receive the labels will decay over time, and eventually the experiment will effectively expire naturally.
Reason this experiment is being extended
We have received feedback that these labels are useful for ad tech companies to evaluate and optimize the APIs, and we want to avoid disruption while we engage with the industry to gather feedback on an updated roadmap for these technologies.
Ongoing technical constraints
None
Will this feature be supported on all five Blink platforms supported by Origin Trials (Windows, Mac, Linux, Chrome OS, and Android)?
No, not supported on webview.
Link to entry on the feature dashboard
Rick Byers
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