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!