Volume Booster is a Firefox extension that lets you increase your browser’s audio volume beyond the standard level. It works with YouTube, Netflix, Spotify, videos, music, online calls, and many other websites.
The extension provides an easy volume control directly from the Firefox toolbar. The Pro version allows volume levels of up to 1500% and unlocks advanced audio features, including a 10-band equalizer, Auto Volume, Sleep Timer, Multi-Tab Mixer, and fullscreen support.
Volume Booster is designed to be simple and easy to use while working with compatible browser audio. No account is required to use the free features.
