I am getting sound from other applications I've tried (Chromium, VLC, Videos), but nothing from Firefox.

Everything looks like it should be working. In sound settings, Firefox is turned up to 100% and when I play something, the output device even lights up like it thinks that sound is coming out, but it isn't.

  • 1
    In my case, Firefox sound was muted in the Volume Control Manager. I was complaining and suffering since weeks :(
    – smonff
    Jul 17 '20 at 9:21
  • 1
    I never did figure out the problem. IIRC, after a restart the problem went away and I haven't had it again.
    – Jeremy
    Jul 18 '20 at 18:43

Install pavucontrol:

sudo apt install pavucontrol

Select required sound device on the Playback tab if a few are installed:

enter image description here

Try different output channels on Output Devices tab if a few are available:

enter image description here


In Gnome (Debian buster) I had the same problem on Youtube with Firefox only (system sound/Chrome and any other application was ok): I had to play a Youtube video, while playing the video I checked the Gnome sound system parameters and select "Applications" tab (you should see Firefox in the list), there the sound was only set to about 10%, I have no idea why...I suspect that this sound parameter has been changed by using VLC volume control...

  • OP says Firefox was turned up to 100%...
    – Zanna
    Apr 23 at 13:09
  • @Zanna is Firefox greyed out? It is nearly unperceptible. In my case it was. If it's your case, just click on it and it will reactivate.
    – stefano
    Jun 7 at 5:50

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