I'm on OSX Catalina 10.15.7 and all of a sudden I am unable to get any sound from my FireFox browser. I tried to play audio/video from 3 different websites - Youtube, 123greeting.com and Gettr and while the video played, there was no audio coming out on any of the sites. I have no problems watching and hearing videos on my other browsers - Brave and Vivildi so this issue is with Firefox on multiple websites. Please advise as to where to look for some switch to turn the sound back on my Firefox browser. Thanks