Mozilla Firefox is my default web browser since it was established. I never had any problems with it until now. It is this baffling sound issue. Firefox will not play any sound. At first I noticed that some adds on Youtube videos were without sound but I took no action. Yesterday I noticed that no sound will play on Firefox browser. I have no issues with my sound card or audio issues of any kind. Google Chrome plays sounds normally, as well as the Edge, this issue is only when I use Mozilla Firefox. I spent most of the time yesterday and today on trying to solve this issue but with no success. I tried every solution i could find on the internet but no joy. Firefox just don't play any sounds. As Firefox is my preferred, default web browser this thing is especially frustrating. Does anybody have a solution for this problem? Please help! I really don't want to go and use other web browsers, I love Firefox and I donate to it regularly.