You can simply click on it to disable/enable sound for that tab. When a Chrome tab plays sound, a small speaker icon will be displayed next to the tab's title, to the right, near the Close 'x' button. Skip ahead for Firefox, Opera, Edge, or Safari. Let's start with Chrome, the first one to make this awesome feature popular. This feature is helpful when you ore opening a website and an advertisement or a media file starts playing, or if you simply wish to quickly/temporary mute a background/inactive tab while you are listening to something else on your PC. We'll cover in this quick guide how the 'Mute' option works for each individual browser and how is it different for some. With Microsoft Edge finally adding a 'Mute tab' option to its list of features (in Windows 10 Insider Preview Build 17035 for PC), we can now put together this list of popular browsers who support disabling sounds in their tabs.