I’ve started avoiding the whole pretence of “tagging” or “organisation” like I tried to do with Pinboard. My bookmarks are now Safari .webarchive files. I have access to them offline, I can back them up the same way I back everything else up, and I just organise them in folders however I want. I even get search!

A “bookmark manager” doesn’t need to be an app or a service -- it can just be a bunch of files.

Edit: I should say that Buku looks like a good program for those who like that way of things, though!