I have to admit that I found GUI of this addon very confusing. It took me a while to catch what the options below note popup are for and how to handle them, especially what switching between "general notes"/"close"/"domain name" does. Not very user friendly to me. I wish to have in FF simple, clearly organized solution like the one in old Opera or Vivaldi Browser.

And to be clear, I do UX design for living, so understanding interfaces is kinda part of my job, but here I was really confused.