Future browsing context group dependency hint

[kjmcnee]

Request for Mozilla Position on an Emerging Web Specification

• Specification title: Future browsing context group dependency hint
• Specification or proposal URL (if available): https://github.com/explainers-by-googlers/future-browsing-context-group-dependency-hint
• Explainer URL (if available): https://github.com/explainers-by-googlers/future-browsing-context-group-dependency-hint
• Proposal author(s) (@-mention GitHub accounts): @kjmcnee
• Caniuse.com URL (optional):
• Bugzilla URL (optional):
• Mozillians who can provide input (optional):
• WebKit standards-position: Future browsing context group dependency hint WebKit/standards-positions#383

Other information

This proposal extends the use of the "opener" rel type to same-window navigations to signal to the browser that the destination page will open a new window and the referring page expects to be able to access it. Some user agents perform browsing context group changes on navigation that aren't strictly necessary for security in order to improve performance. This results in named window reuse not being possible across a back navigation. Annotating an anchor element with "opener" will signal to the user agent that performing a browsing context group change would break a future opener relationship.

Regarding specification, this proposal would consist of a patch for the html spec. See here for details: https://github.com/explainers-by-googlers/future-browsing-context-group-dependency-hint?tab=readme-ov-file#specification-changes

Thanks.