Broken and does not do anything.

Does not work at all on any site, avoid completely.

It need some work. Does functions with Youtube but only when Firefox is in active-focus state. Doesn't work with Anesidora (Pandora player).

only play/pause works

doesn't work

какая-то херня, которая совершенно никак не работает. ни на пандоре, ни на ютубе, ни на спотифае.

Nem működik. Sokkal jobb a Play/Pause, szerző: Daniel Kamkha - ott van egy gyorsbillentyű is, itt hiába állítom be. Ezenkívül rengeteg engedélyt kér, ami persze a használt oldalak miatt is lehet de az említett plugin ezt is megoldja!

all my media buttons(stop, skip back, pause/play, & skip forwards) pause/play the supported apps listed in the description of witch I only use one consistently and only works at all if firefox is the focused app so if I am playing games or do anything that is not in the browser the music is playing in it does not work at!!! DO NOT DOWNLOAD!!!!

Play/pause only

not working with youtube

Play/Pause only

Does not work, when firefox is not on top (so what sense are the media keys for then? i want to control the music, when it's in the background!)
Does nothing else than pause/play.
I could also use the space instead ...

ps: problems are well known since v56 and we are on v74 already without fix ...

Same problem as another user, this only allows me to pause or unpause.

No skip or last track functionality.

Corsair K70
-Google Play Music
-Youtube

not working, it only pause or mute sounds...

Не работают медиа клавиши в Яндекс Музыки.
Если настройки не делать, то любая медиа клавиша на клавиатуре кроме паузы/воспроизведения ничего не может сделать.
Если сделать настройки и сохранить, то клавиши не работают.

The browser has to be in focus for the media keys to register!

Like, wtf is the point of having this add-on, even???
You can't use it when playing a game, or streaming, or, like I said, when you don't have the browser in focus.

Absolutely WORTHLESS add-on, IMO.

For those of you who want to watch/listen to Youtube content while playing a game, use MPC-BE, copy the link location, add the link to the media player and use the media keys to control it. (I can only get pause/play, mute and volume to work, not next/previous.)

Doesn't work with firefox

Doesn't work on my mac (at least for Google Play Music)

I was so enthusiastic when I pressed play/pause immediately after installing this extension. But so disappointed when I pressed previous/next to see that it doesn't work. Other media keys act as if you had pressed play/pause. Too bad, could you please do something to fix this ? Please don't force me to install Evil-Google-Chrome ;) (in Chrome it works out of the box :/ )
Windows 10, Firefox v66 (quantum), standard good old (more old actually) Logitech keyboard.