I think browsers can't go that far I guess. I don't think say google chrome would offer sync service for saves from X, Instagram, YouTube etc. with deep media indexing etc.
"All" you really need is a search engine, and then be able to customize it for each user with a set of URLs that they consider important. Use that to search/query for them.
Can a user run a conventional search?
How is it distributed? Where does the training take place? Are there minimum hardware requirements?
