Very original idea! Puntuado con 4 de 5 estrellas

Thank you for the answer.
If you plan to add more features, I have 2 proposals:
1. Usually the user visits a lot of sites and a lot of topics inside sites and can leave such comments in many places. Therefore it is necessary to have something like list of commented places - a kind of bookmarks, that user will be able to revisit them in the future - he won't be able to remember all places that he commented. It would be better, if this list will allow hierarchy and some nestings.
2. By the same way as comment the user can insert note, remark etc., but in this case probably he will want to have such notes private, e.g. not visible to other. It will be great, if you can provide such possibility - to mark some notes as private.
Thank you

Esta valoración es de una versión anterior del complemento (0.43.1-signed). 

Thank you again for your feedback!
We already planned to implement your first idea - please sign up for the newsletter on our website, we will inform you as soon as something new is online!
We haven't thought about your second idea yet, but we think it would be very useful for some users, so its on our discuss/to-do list :)

Puntuado con 4 de 5 estrellas

As I understand - actually it is like sidebar notes, assotiated with web page. Only those, that use this addon and entered the same page probaly can see my comments and I can see their. Is it right?

Esta valoración es de una versión anterior del complemento (0.43.1-signed). 

Yes, this is correct. But there is more: interesting comments are shown on our website, and we are planning to implement more features, e.g. to correlate comments about the same topics.