Add-ons's notification sound is muted
I don't like the way Firefox uses Windows Action Center to show notifications, so I disabled it by changing alerts.useSystemBackend to false. The problem is Firefox built-in notification system just decides to remove any sound at all and only shows the notifications. It's annoying especially when I'm using this [add-on]. I really need to hear the notification sound. Please help me to bring the sounds back. Thank you.