athine от cytric

Athine lets you control the audio volume of each Firefox tab independently without leaving your current tab.
Features:
- Per-tab volume control from 0% to 100%
- Drag the progress bar or use − / + buttons for precise control
- Hold − or + to continuously adjust volume
- Mute individual tabs instantly
- Mute all tabs in one click
- Works inside embedded players (YouTube, Twitch, etc.)
- No accounts, no data collection, no tracking