Firefox 66 to block automatically playing audible video

[lidel]

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 HTMLMediaElement API once a web page has had user interaction to initiate the audio, such as the user clicking on a “play” button.

– https://hacks.mozilla.org/2019/02/firefox-66-to-block-automatically-playing-audible-video-and-audio/

Chrome is already blocking this as noted here.
Time to throw the towel and switch UI to click-to-play pattern.