На yandex.ru не работает. Браузер мазила

Works great so far :)

Obviously it's good, I totally forgot it is there!

If "block element" is activated, I will expect that remains open for add many elements. It's not a good taste that I must to open the addon one time and other in the same tab, one for each element. App would be remains open until I check a switch when I finished of select all elements to be blocked on that page

So far so good. Shall share my detailed view later.