I used to use something similar but from a tampermonkey script extension which had a small button called bookmark on every website which would then use github gist for that. I think I still have it but its been sometime since I have used it.
Yes exactly! I did this kind of thing too for a little while. I ended up using the Gist to access the bookmarks but figured it would be nice to have an optional viewer to search/sort. Also having it across all devices is a big plus. One of the features I miss now that Pocket used to offer with their bookmarklet.