why mozilla randomly goes mutes in all of tabs

ive been facing this issue since i dowloaded mozilla in my mac mini, and it just randomly decides to not play audio at all unless i shut all of the tab down and re start the entire browser which is very annoying because i am a video editor and i am working multiple tabs at a time and need audio always and since tabs can't restored in the order they were before closing this is sabotaging my work heavily, i love the browser overall but this specific ruins it because its a basic feature