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Firefox gone sound on Youtube

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Hello. Today suddenly sound stopped working on Youtube and tried changing volume as well made sure there is no muting. I tried opening videos on Youtube via Chrome and sound was working fine. How to fix this issue on Firefox?

Hello. Today suddenly sound stopped working on Youtube and tried changing volume as well made sure there is no muting. I tried opening videos on Youtube via Chrome and sound was working fine. How to fix this issue on Firefox?

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