&systemaudio

Excludes the system-audio as an audio source when display sharing

Sender-Side Option! (&push)

Details

&systemaudio excludes the system-audio as an audio source when display sharing. Tab audio is still available though. (can help prevent accidental audio feedback loops)

For more details on these new features see here: https://developer.chrome.com/docs/web-platform/screen-sharing-controls/ (Chrome/chromium-browsers only)

Related

&screenshare