Snort v0.2.0: Worker Relay In The Browser "This release contains a full nostr relay in the browser (the worker relay). It works like any other relay on nostr, and allows us to cache content efficiently. This also means that all reactions, replies, and posts are cached in your browser and are always available, even when you are offline." - @Kieran https://www.nobsbitcoin.com/snort-v0-2-0/
That's what I had tried once, too. The worker would get requests to get further events and store them locally and all the tabs would just watch the indexedDB for new stuff to show.