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My goal is to have a custom shortcut, which mutes/unmutes all sound coming from Firefox, toggling between the two states. I can't seem to find any info on how to achieve that.

DK Bose
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Reum12
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    maybe this article will help. – Sirajus Salekin Feb 06 '17 at 16:12
  • @SirajusSalekin It definetly goes in the right direction. The Play/Pause add-on is bugged for me, it seems. I doesn't register the keys I actually pressed but rather some rubbish. So, there is no way to mute a certain application via command? – Reum12 Feb 06 '17 at 18:15
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    And http://askubuntu.com/questions/254424/how-can-i-change-what-keys-on-my-keyboard-do-how-can-i-create-custom-keyboard – muru Feb 07 '17 at 02:28

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