This extension should allow you to set basically anything you want for YouTube. Preferred resolution, audio level, playback speed and much more. https://addon

This extension should allow you to set basically anything you want for YouTube. Preferred resolution, audio level, playback speed and much more. https://addons.mozilla.org/en-US/firefox/addon/enhancer-for-youtube/ https://addons.mozilla.org/en-US/firefox/addon/enhancer-for-...