Quickly Boost The Volume Level In Google Chrome Upto 600% With This Add-on
Volume Master is a Chrome add-on that can boost the volume playback significantly (as much as up to 600%).
Download and install it from the Chrome Web Store here.

After it is installed, pin it next to the Chrome address bar by clicking on the Extensions icon.
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Using Volume Master is very simple. Click on the add-on icon to raise or lower the volume.

Once any tab with audio is opened, it will automatically be displayed in the bottom pane of the add-on pop-up. When there are multiple tabs opened with audio, you can directly switch to them from the add-on window as they would be listed under the section Tabs playing audio right now.

Also, by default, Volume Master is not enabled for Incognito Mode. To enable it, right-click on the add-on icon and choose Manage Extensions.

Then enable the slider next to Allow in incognito.

This is a useful Chrome add-on when you’d want to turn up the audio within tabs. For Firefox, Audio Equalizer is another similar add-on.
All done.