Add-on's notification sound is muted en (fedia.io)
I don't like notifications being shown in Windows Action Center, so I disabled it by changing alerts.useSystemBackend to false. The problem is Firefox built-in notification system just decides to mute notification sound and only shows the notifications. It's kinda annoying especially since I'm using this timer add-on. Please...
![A purplish-white FireFox logo over a rainbow backdrop](http://kbin.fedi.cr/media/cache/resolve/entry_thumb/94/1f/941fe7dc52ed6eb693e2fe993607e5a9ce1579dd7fc94c139a670cc5c0614dcd.png)