zlacker

Firefox is also missing a don't allow any website to play audio unless explicitly enabled setting (mute tabs by default, except on allowed sites), as far as I can tell.

>>realha+(OP)
I think it has?

Go to Settings, and search for Autoplay (or in the left navigation, select Privacy and Security and scroll to Permissions).

Click the Settings button next to Autoplay, and set the default to whatever you like (amongst them "Block Audio").

>>bartvk+78
That's not the same thing. Chrome's setting can force audio to be muted regardless of user interactions or manually started playback, until the website settings are changed to allow sound.