AcrossTabs – Easy communication between cross-origin browser tabs

In plain words

AcrossTabs enables communication between browser tabs that are open on different websites or origins. Launched in 2017, this tool solves the technical challenge of sharing data across tabs that would normally be blocked from interacting due to browser security restrictions. It is designed for developers building web applications that need coordinated functionality across multiple domains. The solution provides a straightforward way to implement cross-origin messaging without complex workarounds.

written from the facts on this page · September 2026

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