Linux Mint/cinnamon 22.3 No Sound Playing Videos (youtube, Rumble & Bitchute) With Mozilla Firefox

Me again! Finally got Linux installed on my 2nd machine - had a hard time as it would not install from any of the DVD's I had made. Finally loaded the ISO file to a USB jump drive and it installed. Liking it so far - easier to add software and my printer over windows/trying to find my disks or the network printer! Anyway my problem is no sound while watching online videos using firefox. I researched and printed/followed a bunch of things but still no sound? I do have sound for the various things like Linux mint starting etc as well as I just tried a saved youtube video off of a jump drive and I have sound. Any ideas on how to fix this? I haven't looked yet is there a different browser I should be using or am I missed a setting or extension I need?

 

Update! I installed Chromium and have sound now with videos. Still would like to get firefox working but at least I can use Chromium.

 

Thanks but tried that as I have muted tabs several times accidentally while selecting a tab!

 

Good here! Shows firefox at 100% but still no sound. Found a setting for auto play videos and audio which setting is allow all web sites audio and video!

 

In firefox check the little box in the circle of the pic I posted, and see if sound is blocked there. If so just click it and select unblock. This could be it. Hope it helps.

 

No sound isn't blocked there. And I noticed the permissions for youtube block audio and video setting in your picture which I have found and made sure it is set to allow audio and video! Thanks anyway! Anything is worth looking at but I can get by now since I downloaded chromium and sound works with it. Still would like to figure it out but can live with it now.