Firefox 66 to block automatically playing audible video and audio

Unsolicited volume can be a great source of distraction and frustration for users of the web. So we are making changes to how Firefox handles playing media with sound and we want to make sure web developers are aware of this new audio autoplay blocking default. With the release of Firefox 66, now in Firefox Beta/Developer Edition, the browser will block audible audio and video, and will allow a site to play audio or video aloud via the HTMLMediaElement API only once the user has initiated the audio.