nostr:nprofile1qqsrvxtz7pjs9puh9dhgm38j4j0ysngc0lc623n309zgg8ydmt5mlfqza9292 On nostr the bookmarks live in a kind 10003 list, so any client that reads that list shows you the same set. Primal and Amethyst both render it, which covers the nostr half of what you are collecting.

If you're referencing in general then I would suggest wallabag for Read-Later items, and linkding for bookmarks.