That’s super cool! I was suspicious because extensions, and there’s no privacy policy or anything, but found it on GitHub and I’m going to fork it and play around with it. Thanks for the tip!
One thing I’ve thought about was having the browser address bar double as a command palette and have apps built with Redux, xstate, etc. expose their action names / state transition messages to it. This might be doable by extending this extension, maybe even without direct cooperation from the app. Maybe even in general by introspecting the page’s JS and indexing event listeners.