Hi folks
just a warning that it's easy to mute audio on Firefox quite by accident -- unmuting in the video doesn't work. Not sure what key combos I pressed -- trouble of course when working with different language keyboard layouts simultaneously.

The ony way I could unmute it was to right mouse click on the icon on the taskbar which if you had hidden it !!! tough luck.

You should in the icon see a little loudspeaker embedded if audio is playing or muted.

Firefox - audio mute - warning-screenshot_20210223_094622.png

My stupid error but I'm sure others might have fallen into this trap and it's not intuitive how to "repair the damage"