hi iangeordie, Check the Volume Mixer # Open Firefox and play content that should play sound, such as this Firefox video. # Right-click the volume icon in the Windows taskbar. # Click Open Volume Mixer. The Volume Mixer window will appear. # Make sure the slider for Mozilla Firefox is not muted or at the bottom. <img src="https://user-media-prod-cdn.itsre-sumo.mozilla.net/uploads/gallery/images/2018-06-17-20-46-56-141168.png"> Check your audio device Make sure that the audio device (such as speakers or headphones) are turned on and connected to the computer properly. ''' Follow this below link''' https://help.netflix.com/en/node/468