We know that 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. We want to make sure web developers are aware of this new autoplay blocking feature in Firefox.
Starting with the release of Firefox 66 for desktop and Firefox for Android, Firefox will block audible audio and video by default. We only allow a site to play audio or video aloud via the
HTMLMediaElementAPI once a web page has had user interaction to initiate the audio, such as the user clicking on a “play” button.
Good move, and long overdue. Autplaying video isn’t just a mere annoyance – it’s incredibly rude, obnoxious and desrespectful.