And without making visual changes on the website you are viewing.

It also installs a button, but you only need to click it once. Mozilla Firefox Muter however, now that’s something else. And it’s even quicker to find the playing source on the webpage manually and stopping it myself. It doesn’t protect me from being startled to death by sudden loud noises. If it does find it, then you have to click to stop it, after which MuteTab places a cover over that part of the web, with something like ‘object stopped by a MuteTab’. MuteTab even sometimes says it there is no sound source (but you can hear it). It installs a button which you must click, then there you must start clicking in searching which tab is creating the sound, all this while listening to the loud sound already. Problem is Google Chrome MuteTab is no way that good as Firefox Muter.