Mute audio in tabs in Safari on Mac
Safari lets you mute audio in any open tabs—helpful when you’re listening to audio from one website, and unwanted audio starts playing from another.
Mute audio
In the Safari app on your Mac, do any of the following:
Mute audio in the tab you’re viewing: Click the Audio button
in the Smart Search field.Mute audio in other tabs: If you’re viewing several websites that are playing audio, Option-click the Audio button
in the Smart Search field to let audio play in the tab you’re currently viewing and to mute the audio in other tabs.Mute all audio: If you’re viewing a website that’s not playing audio and other tabs are playing audio, click the Audio button
in the Smart Search field to quickly mute all audio in other tabs. Mute any tab: Click the Audio button
on the right side of the tab in the tab bar.
See websites that are playing audio
In the Safari app
on your Mac, click and hold the Audio button in the Smart Search field to see a list of websites that are playing audio.Choose a website to go to the tab where the audio is playing.
If you’re viewing a website that’s not playing audio, the list of open websites also includes the Mute All Tabs option. If it is playing audio, it includes the Mute This Tab or Mute Other Tabs option.
Unmute audio
In the Safari app
on your Mac, click the muted Audio button 
in the Smart Search field, or on the right side of the tab in the tab bar.
Note: You can mute and unmute audio in tabs that are in the active Safari window as well as in tabs that are in other Safari windows behind the active window.