this and dark reader night eye are the exact same add-on, both just invert even if the site has a dark mode turning it to light gray almost white. it forgets all your changes when you turn it off, and hide some elements on sites.

This black color looks very nice, however on my eyes the matt is easier than the gloss. On some YouTube videos with white background one cannot see the controls on the bottom bar - the Pause/Play button as well as the voice level control.