If you're the type to have multiple tabs open on your Chrome browser (and who isn't?), then you're going to want to download this free extension right away. Called MuteTab, this extension helps you find the tabs that are making noise — whether it be from music, an autoplay video, or an annoying ad ("Congratulations, you've won!") — and lets you shut them down with the click of your mouse. You can even automatically mute all background tabs, so you can enjoy browsing in silence. Finally.