Note that muted autoplay is also currently allowed by default in all major browsers which block autoplay media. Another strategy to consider for video is to autoplay muted, and present an “unmute” button to your users. If you want to avoid having your audible playback blocked, you should only play media inside a click or keyboard event handler, or on mobile in a touchend event. In general, the advice for web authors when calling ay(), is to not assume that calls to play() will always succeed, and to always handle the promise returned by play() being rejected. All major browsers which block autoplay express a blocked play via this mechanism. This allows users to easily curate their own whitelist of sites that they trust to autoplay audibly.įirefox expresses a blocked play() call to JavaScript by rejecting the promise returned by ay() with a NotAllowedError. Firefox will then allow that site to autoplay audibly. Users can click on the icon to access the site information panel, where they can change the “Autoplay sound” permission for that site from the default setting of “Block” to “Allow”. When Firefox for Desktop blocks autoplay audio or video, an icon appears in the URL bar. There are some sites on which users want audible autoplay audio and video to be allowed. In Firefox for Android, this will replace the existing block autoplay implementation with the same behavior we’ll be using in Firefox on desktop. We expect to roll out audible autoplay blocking enabled by default, in Firefox 66, scheduled for general release on 19 March 2019. So script can set the “muted” attribute on HTMLMediaElement to true, and autoplay will work. 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.Īny playback that happens before the user has interacted with a page via a mouse click, printable key press, or touch event, is deemed to be autoplay and will be blocked if it is potentially audible. Starting with the release of Firefox 66 for desktop and Firefox for Android, Firefox will block audible audio and video by default. We want to make sure web developers are aware of this new autoplay blocking feature in Firefox. So we are making changes to how Firefox handles playing media with sound. We know that unsolicited volume can be a great source of distraction and frustration for users of the web. Isn’t it annoying when you click on a link or open a new browser tab and audible video or audio starts playing automatically?
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