Gain - Volume Booster by Hookset

Gain gives you real control over your browser audio.

If a video is too quiet, a stream is mixed badly, or Firefox just does not go loud enough, Gain lets you boost any tab from 0% to 600% using the Web Audio API, far beyond the browser’s built-in limit.

Key Features:

• Volume control from 0–600% on supported tabs
• Bass Boost and Voice Boost EQ filters
• Dark mode, synced across popup and settings
• Audio tabs list to see tabs currently playing sound
• Per-site volume memory for faster repeat use
• Default volume setting for newly activated tabs
• URL-change reset to prevent boosted settings carrying into a new video or stream
• Playlist-friendly option to keep settings when the URL changes
• Blacklist and whitelist for site control
• Click-to-use activation with optional per-site persistent access
• Dynamics compressor to reduce distortion at higher gain
• Live toolbar badge, color-coded by volume level
• Keyboard controls: arrow keys adjust volume, Shift + Arrow Key adjusts in larger steps
• Direct number entry for precise volume control

Privacy:

Everything runs locally.

No accounts, no tracking, no data sent anywhere — ever.

To view the source code, visit the dedicated GitHub repository.

Open source under the GPL v3 License.