@nprofile1q... There's so much more we could do in a purely-local fashion with browser history today, even without LLMs. Several years ago I discovered that (at least in Firefox) the browser history records referrer information that I think isn't displayed anywhere in the UI. I made a quick proof of concept WebExtension that offers a sidebar which shows you, for the current page, which pages you've visited it from, and which pages you've followed links to. I think people more clever than me could find all sorts of user-directed applications for that information.
https://github.com/jameysharp/contextual-history