There is an issue. Installed it and tried adjusting volume. Started audio and it was silent. Turned it up, turned it down— still silence. Restarted Firefox, played audio. Audio worked. The moment I click the add-on icon, audio cuts out.

Install this to disable Firefox sound altogether. Very useful.

does not work

DOES NOT WORK!! - DO NOT INSTALL

Does not work at all. Moving the slider does nothing.

Why is this addon interrupting amazon?

Does not work

broken

does not work

Doesn't work, crappy UI too.

Doesn't work

It doesn't affect "apps" in tabs like games. Only videos, so not tabs.

Ohne Funktion. Man kann den Regler verschieben, der Tab plärrt weiter laut.

If you can't associate the tab volume with tabs, then FTFO... don't need another useless icon overlowing my Firefox bar

I have tested this extension on Dailymotion. The volume has not changed. This extension is absolutely unusable.

Doesn't work. Doesn't do anything.

No effect. Volume doesn't change