Hi Rafa, For now, local-storage is the only true cross-browser solution. If you stack includes a server, you can use WebSockets. This allows you to communicate between more as just tabs on the same computer. Another alternative is webrtc peer-to-peer, you don't need a server for this. When only targeting the local computer cross-tabs on the same browser, you can also use service-worker. There are a few more, but the ones I mentioned all have good browser support.
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