Download SoundLock chrome extension. Detects when you are closing a tab with audio playing, and warns you. Use: click the extension button on the tab with music/audio. and install in your Google chrome browser. This is Direct SoundLock Crx download for Chrome it is also called SoundLock offline CRX for chrome Download. This SoundLock is used to Detects when you are closing a tab with audio playing, and warns you. Use: click the extension button on the tab with music/audio.