Step 1: Open Chrome Experiments
Muting tabs is a Chrome experiment which means that it’s not fully tested yet and might not work all the time. While this might be relevant and important for some tests, there should be nothing to worry about with this test. To access the Chrome Experiments tab, you have to copy and paste the following URL in a Chrome tab: chrome://flags/
Step 2: Find Enable Tab Audio Muting UI Control
Next, find the Enable Tab Audio Muting UI Control setting and activate it. You can just hit ctrl + f (cmd + f on a Mac) and search for it or access it directly by copy and pasting the following URL to a new tab: chrome://flags/#enable-tab-audio-muting
Step 3: Done – Mute tab audio by clicking on the speaker icon
Whenever you want to mute a tab, just click on the speaker icon and it will be muted. Clicking the icon for a second time will enable sound again.