This is perhaps one of the best add-ons out there, deserving thousand of stars. Sadly, I can only give 3 stars because the current GUI makes this add-on unusable.

I perfectly can live with blocked stuff, but I need a handy friendly GUI to unblock stuff. Your current GUI presents an endless list of blocked stuff, and this makes almost impossible the browser experience. If you allow me a suggestion, a kind of uMatrix GUI here will be great. You must present the blocked stuff in a way that the user easily can block or unblock stuff. Perhaps the uMatrix layout wont work... okay, no problem... but please, try something different than the current endless list of blocked stuff.

Also will be nice options to choose categories of blocked JS (not just "accepted" and "blocked").

If you can do that, I'm sure this will become one of most used add-ons.

Thank you in advance!

It would be nice to know exactly how you know whether a bit of code is free or not. Does the file have to put little licensing blurbs in every file on their site saying that they have to comply with certain terms of service that a group of people say are acceptably free? It's as silly as someone saying "address me as Lord Firefox." It sounds like a silly, toe cheese eating, impractical concept.