[wazoox]

First, it's not self-hosted if it's not running on my computer (or eventually my private cloud).

Second it seems like it doesn't snapshot the web pages? That's the killer feature that made me use Zotero, though it's big, ugly and clunky. I was tired of getting broken links or free articles that later required payment to be read again. I was quite happy with Instapaper, but annoyed by the not "self-hosted" part.

[gildas]

SingleFile [1] has some basic options allowing you to archive pages you add in your bookmarks.

[1] https://github.com/gildas-lormeau/SingleFile

[wazoox]

Good job :)

[vorpalhex]

Check out ArchiveBox. Not as much of a bookmark manager but great for archiving pages.