Intent to Prototype: Related Website Partition (RWP) API
Dylan Cutler
Explainer
https://github.com/explainers-by-googlers/related-website-partition-api
Specification
None
Summary
The Related Website Partition (RWP) API is a novel mechanism for providing third-party embeds access to a partitioned, non-cookie storage handle which allows them to continue a single session across multiple domains in the same Related Website Set.
Related Website Sets (RWS) introduces a new privacy boundary on the web which allows sites to have access to their unpartitioned cross-site state when they are embedded on other related sites.
Blink component
Blink > Storage
Motivation
Some third-party SaaS developers embed their content on sites which are part of a Related Website Set and wish to maintain a continuous session across multiple sites within that set.
The RWP API provides a way for third parties to maintain a single session across sites in an RWS using storage that does not prompt the user and is limited only to activity within that set. This is in contrast to using the Storage Access API, which does prompt the user and grants the third party access to activity outside the current RWS.
Initial public proposal
https://github.com/WICG/first-party-sets/issues/94#issuecomment-2138292885
TAG review
https://github.com/w3ctag/design-reviews/issues/1047
TAG review status
Open but no feedback yet.
Risks Interoperability and Compatibility
None
Gecko: No signal
WebKit: No signal
Web developers: No signal
Other signals: N/A
WebView application risks
Does this intent deprecate or change behavior of existing APIs, such that it has potentially high risk for Android WebView-based applications?
No
Debuggability
None
Is this feature fully tested by web-platform-tests?
No
Flag name on chrome://flags
TBD
Finch feature name
TBD, likely kRelatedWebsitePartitionAPI
Non-finch justification
None
Requires code in //chrome?
The implementation of the feature would not depend on code in //chrome.
We may modify the browser UI defined in //chrome which provides information about Related Website Sets.
Tracking bug
Estimated milestones
We will do an Origin Trial in M137 or M138
Link to entry on the Chrome Platform Status