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Very simple volume control made specifically for Firefox!

Up to 600% volume boost
Control each tab volume individually
Finer control: 0-10% in 1% increments, 10-600% in 10% increments
Domain level volume management
Saved volumes between sessions - even after closing and reopening the browser
Volumes are applied as soon as the page is loaded
Volume changes propogate to other tabs with same domain automatically
Now with more robust volume control over audio + video elements, and now AudioContext objects (for things like web games)

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