How to mute audio on your Mac browser when you don’t know where it’s coming from

Unusual times prompt unusual occurrences. A friend was watching a science museum presentation and the presenter was flustered because of a recurring loud sound. They ultimately tracked it down: a tab on their browser was playing back an eagle video. You know: normal!It’s easy to have mysterious sounds playing from browser tabs. This often occurs because of auto-playing video on a page load, the auto-play feature in YouTube that seems to re-enable itself on my devices all the time, or page