Tab Volume Manager от Nikola

Control the volume of individual browser tabs with a simple slider. Adjust volume from 0% to 1100% with a non-linear boost range, letting you amplify quiet audio or reduce loud tabs without affecting others.
Features include per-tab mute/unmute toggle, play/pause control, one-click reset to 100%, scroll wheel support on sliders, and snap points at common volume levels. Tabs with active audio appear
automatically in the popup, sorted by activity. Pop out into a standalone window for persistent access while browsing.