Does what it says in the most flawless way possible.

good

Muito bom, recomendo ao pessoal usar. Eu não vejo anuncio a um tempo depois que instalei ele

someone tell me does it work?

gud and reliable

ОК

Is a good extensions

EXCELENTE

very good

I just added this addon to Firefox and tried it out on FB and nada, blocked zero adds. Refreshed page, closed and reopened FF and the same result. Nothing. It will block elements readily but adds were still profuse.

Apart from an occasional nudge they show, to rate the plugin (once every month or so I guess, not more) - the plugin has prevented so many ads from showing.

This add-on has its own ads pop up to block the browser screen as here:
https://ibb.co/N2PBm0R

If the computer is in unmanned operation mode next time, will it cover the display of important screens?

it brock only one site and still the best