Oh cool I used to use https://web.hypothes.is/ https://web.hypothes.is/ for this but they never had a good Firefox extension so I stopped. How do you annotate w

Oh cool I used to use https://web.hypothes.is/ 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?