Firefox blocks all media with sound from playing automatically. If you want a website to automatically play media, you can give it permission by following one of the methods below.

Notification prompts

When a website tries to play media automatically, Firefox will alert you by showing a message. Choose Allow or Don’t Allow to let Firefox remember the permission setting for this website. If you uncheck Remember this decision, Firefox will remember the setting for this website in the current tab only.

Site settings

Click the in the address bar to open the Control Center, where you can clear the permission so that Firefox no longer remembers the setting.

Add sites to your list to autoplay media

1. In the Menu bar at the top of the screen, click Firefox and then select Preferences or Settings, depending on your macOS version.Click the menu button and select Settings.
2. Select the Privacy & Security panel.
3. Scroll down to the Permissions section.
4. Find For websites that autoplay sound and click Exceptions to manage your list.

Always allow or disallow media autoplay

To always allow or disallow autoplay for all media with sound, follow these steps:

1. In the Menu bar at the top of the screen, click Firefox and then select Preferences or Settings, depending on your macOS version.Click the menu button and select Settings.
2. Select the Privacy & Security panel.
3. Scroll down to the Permissions section.
4. Next to For websites that autoplay sound, click the drop-down menu to choose Allow Autoplay or Don’t Autoplay. Your selection will apply to all media for all websites.