The Private Aggregation API is a generic mechanism for measuring aggregate, cross-site data in a privacy preserving manner. It was originally designed for a future without third-party cookies. Following Chrome's announcement that the current approach to third-party cookies will be maintained, we are now planning to deprecate and remove the Private Aggregation API (along with certain other Privacy Sandbox APIs, as outlined on the Privacy Sandbox feature status page[0]). This API is only exposed via the Shared Storage and Protected Audience APIs, which are also planned to be deprecated and removed. So, no additional work will be required for Private Aggregation. [0]: https://privacysandbox.google.com/overview/status
Chrome has announced[0] that the current approach to third-party cookies will be maintained. Given this, we expect adoption of the Private Aggregation API to decrease over time as cross-site measurement will remain possible in Chrome using third-party cookies. Further, other browser engines have not signaled interest in launching the API. Removing this (and certain other Privacy Sandbox APIs[1]) will help focus efforts on the proposed interoperable Attribution[2] standard. [0]: https://privacysandbox.com/news/update-on-plans-for-privacy-sandbox-technologies/ [1]: https://privacysandbox.google.com/overview/status [2]: https://github.com/w3c/attribution