It's ok, but I would prefer to map my media keyboard keys, instead of some random key combination :S

Hey Marcin!
1) Thanks for the update, I installed it and restarted my Firefox, but...it still doesn't work! It still behaves the same way..."MediaPrevTrack" and "MediaNextTrack" are still just playing/pausing the song instead of going to the previous track or next track. I am using Firefox 66.0.2 (64-bit) on Windows 10 Home (version 1803). This is the type of laptop that I am using: https://support.hp.com/us-en/product/hp-envy-15-aq100-x360-convertible-pc/12499186/document/c05270626
Let me know if I can help you with anything to get this fixed!
2) Thanks for the suggestion, I have voted for this bug on the bugzilla site!

Perfectly simple! Does what I wanted and nothing more.

Does what is says. I can't think of a higher praise than that :)
Thanks for making this.

Excellent, especially after having issues with the desktop app freezing

Worked for 5 mins, then suddenly all assigned media keys on my keyboard just pause/play the track.
Edit: I've played around with this. I can only seem to add 1 media key function (MediaNextTrack/MediaPrevTrack/MediaPlayPause). No matter if I add another one to another function ONLY the first added shortcut will work. I'm totally baffled.

bagus

Hello! MediaKeys on macbook with touchbar not working(.

It is working ! Thank You !

Très utile sous Windows 10

Simply do what it should (almost).
The only thing I'm missing is a shortcuts to like/dislike songs. Extension could be a lot more better with them :)

Works very well !!!
For those who want to use keyboard media keys for control, i've done a little AutoHotkey script:

;next song
Media_Next::
IfWinExist, ahk_class MozillaWindowClass
WinActivate
Send !+0
return

;previous song
Media_Prev::
IfWinExist, ahk_class MozillaWindowClass
WinActivate
Send !+9
return

;play/pause
Media_Play_Pause::
IfWinExist, ahk_class MozillaWindowClass
WinActivate
Send !+8
return

You're welcome :)

Unfortunately the Next Song hotkey (Ctrl+Shift+0) does not work. the other two do.

Does what is says. Thanks for making this!

Perfect, exactly what I was looking for. Mozilla should rush itself to enable media keys support, since users use Web Browsers as music players.