I think this is totally reasonable, and a very forward thinking imagining of what the future of the internet could be like. I just thought that the analogy you made in the previous comment was a good one to poke fun at.
I like the idea of being able to run elasticsearch/whatever on a local copy of the full text of all of your bookmarks.
When I was using Librewolf maybe 4 years ago, it was never up to date with Firefox. I thought it could be a potential security risk, sometimes it took months to incorporate Firefox security updates. Has that improved recently?