Exactly what I was looking for, doesn't need any privileges and can be added as a single button to the toolbar. Sound ON/OFF, it is as simple as it can be.

Отличное расширение.

works as intended!
can you add to mute normal window and private separately? because when i click mute it muted all my windows, thanks!

Great exstension!Nowdays that the Web is full of any kind of disturbances this one is practically essential.Actually it should be a default feature of Ff.

Хорошее и самое главное простое и рабочее дополнение без всяких лишних опций. Все ясно. Вмсит значек на панели с перечеркнутым или нет динамиком. просто нажать на него и все будет видно!

Wonderful！！！

Great！

Parfaite extension, que dire de plus ? Désolée, je manque d'inspiration pour le moment. Mais une chose es t d'ores et déjà certaine : je reviendrai. Merci beaucoup pour votre ingéniosité. Bonne continuation !!!

All I can say is I LOVE IT! AWESOME!!!! THANKS!!!

Very good. Allows defining whitelist / blacklist

Please, make a light add-on icon for the dark browser theme.