This extension enable, virtually, infinite boost of any sound played within a chrome browser tab.
Whether a Youtube video, a Webex meet or a Spotify/Deezer audio track, boost sound volume as you want simply by clicking on extension icon and sliding right or left.
You can also reduce a specific tab sound or mute it if you want.
v1.1.1: addition of quick access buttons
v1.2.0-1.2.5: major UI adjustments