> Not cross-tab, but cross-origin. The [opening paragraph](https://html.spec.whatwg.org/multipage/web-messaging.html#broadcasting-to-other-browsing-contexts) on BroadcastChannel: _"Pages on a single [origin](https://html.spec.whatwg.org/multipage/origin.html#concept-origin) opened by the same user in the same user agent but in different unrelated [browsing contexts](https://html.spec.whatwg.org/multipage/browsers.html#browsing-context) sometimes need to send notifications to each other"_ We have discussed before how embedding a cooperating cross-origin "mailman" iframe could bypass the cross-origin restriction. (And in this context Storage Partitioning was brought up.) -- GitHub Notification of comment by eladalon1983 Please view or discuss this issue at https://github.com/w3c/mediacapture-handle/issues/11#issuecomment-1067753801 using your GitHub account -- Sent via github-notify-ml as configured in https://github.com/w3c/github-notify-ml-configReceived on Tuesday, 15 March 2022 09:31:26 UTC
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