Oh cool I used to use https://web.hypothes.is/ for this but they never had a good Firefox extension so I stopped. How do you annotate with friends using Margin? Does everyone need to be on the same at proto server?

This appears to be very interesting. What happens when the site goes offline or they change the underlying content I highlighted? Is there the ability to see the versions as it was when I annotated?

The social-proofing aspects of solutions like this tend to interest me more than "building my own library"

cool, wrote a whitepaper on this called wikilay a decade ago. Definitely a way to build a better civilizations on the remnants of the slop torrent.