I've actually been building something like this: a desktop app that basically records everything you see and hear, and makes it searchable. Maybe we could team up: my email is govind <dot> gnanakumar <at> outlook <dot> com.
The Arc browser has a feature called Easels that does this; I quit like it even though it lacks some polish. I imagine they want to do more with it in the future
The browser is in beta and macOS only currently, but a friend recently invited me. E-mail me (in profile) if you'd like an invite to explore what they've done with it.
I can give out 5 invites I think, if anyone else wants it. So, first come first served!
Print-to-PDF, build your own local Internet .. best bookmark system ever, literally doesn't require anything to be installed, just put the resulting PDF's in folders and use pdfgrep and ag to your hearts content .. "ls -alF | grep thatarticlesubjectiremembervaguely"