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Firefox does not play sound on any Internet site

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Whenever I visit any website to play music or watch videos no sound is provided. I can visit the same sites using Chrome and the all play sound. I can play music that resides on my PC without any issues. I have re-installed Firefox but to no avail - still no sound. My sound settings are not muted either in Windows, when on the various sites and within Firefox itself. I have Autoplay permissions set to allow video and audio. I am using 79.0 (64 bit) What is the problem and how do I resolve it?

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