It appears to be that, but it appears also to pull out the content of the web page and index that too, so you can (presumably) find stuff that isn't in the "pure" bookmark, which I think of as a link with maybe a title.
Actually, I've been trying to find Firefox extensions that give a better interface to bookmarks and there doesn't seem to be one. It's like, people don't use bookmarks anymore and accept that it might as well not exist, and use something else.
It's telling that Firefox has two bookmark systems built-in (pocket and regular bookmarks) and they aren't integrated with each other; I suppose that people that use pocket never think about regular bookmarks.
edit: but my pet peeve is that it isn't easy to search history for something I saw 10 days ago but I don't remember the exact keywords to search.
This has applied since ever to regular bookmarks as well. Basically you can just throw everything in unsorted and use tags only.
This, outside a browser, could be implemented as a server/client self-hosted solution with a back-end taking care of downloading/searching and an extension acting as client. Maybe it could even be made entirely as extension?
At the very least, it would need to be able to get the content pushed to it by the client, the way the client has it at moment of bookmarking, making the download/scraping kindof superflous.
Indexing and doing search, however, is hard, but solved. Hard in the sense that it is not something a firefox addon could do very well. I presume a (self)hosted meilisearch would suffice, though.
Edit: here's the description from their repo
"ArchiveBox is a powerful, self-hosted internet archiving solution to collect, save, and view sites you want to preserve offline.
You can set it up as a command-line tool, web app, and desktop app (alpha), on Linux, macOS, and Windows.
You can feed it URLs one at a time, or schedule regular imports from browser bookmarks or history, feeds like RSS, bookmark services like Pocket/Pinboard, and more. See input formats for a full list.
It saves snapshots of the URLs you feed it in several formats: HTML, PDF, PNG screenshots, WARC, and more out-of-the-box, with a wide variety of content extracted and preserved automatically (article text, audio/video, git repos, etc.). See output formats for a full list."
I mean, Firefox's bookmarking isn't perfect by any definition, but they're the only browser (I'm aware of) that has put any effort into helping you use the web in the future. Other browsers seem to say, "if you're trying to use our browser to do something other than use the web at the present moment, we don't care about that. Enjoy taking 8 clicks to do anything other than stare at the viewport."
Have you tried Zotero?
I guess it's just easier to not install an extension and right-click, save page as.. and move on with life.
I can't remember if zotero was that simple - it may have been. I enjoyed using it back when. I can't recall if there was a good backup/export system with it back then.
currently it's easy for me to have docs/webpagesaved auto backed up to an external drive, which gets me through.
I may revisit zotero as I liked the idea behind it and the extra category / sorting stuff that was available / optional.
I think I went through a phase where ffx really bogged down with lots of open tabs (20 versions ago maybe?) then I tried disabling extensions, auto-sleeping-tabs-extension, stuff like that .. and soured on some extensions no longer working with newer ffx, and some concern about spyware and such, and never went back to all the addons / personalizations once enjoyed back in the day..
The academic uses of Zotero lean heavily on the metadata schema is uses, which is tailored for research and publishing. Things like DOI, ISSN, metadata about the publication, etc, might not be terribly useful for anyone outside academia.
Opera v9.5 (released 2008) up to v12 does this.
Its website seems to still be up to this day! http://www.xuldev.org/scrapbook/
This extension didn't survive the days of breaking API compatibility that Firefox went through (sigh). However, seems like some replicas exist that aim to provide the same or similar functionality, such as ScrapBee https://addons.mozilla.org/en-US/firefox/addon/scrapbee/
Provides a Firefox plugin, saving pages is just a click away
All notes (and consequently bookmarks and their contents) are stored as plain-text markdown files - so there's no dependency on a proprietary format, and all the content becomes searchable.
If you're a vim-user, you can also get the notational-fzf-vim plugin (https://github.com/alok/notational-fzf-vim) and point it to the notes/bookmarks folder, and have full fuzzy search over all the content.