Sound Adjuster by tropic

Sound Adjuster provides additional audio controls for media playing in Firefox.

Features:
• Volume gain from 0x to 5x
• Left and right stereo balance
• Optional per-site profiles with Remember site
• Five-band equalizer with presets
• Mono and left/right channel controls
• Light and dark themes
• Automatic detection of newly loaded media

Your selected audio settings remain active in the current tab when the popup is closed. Sound Adjuster also applies the current settings to new media loaded on the same page, including dynamically updated feeds.

If you enable Remember site, Sound Adjuster stores the current gain, stereo balance, mono, channel-flip, and equalizer settings for that site. These settings are restored after the page is reloaded and are also applied to media added later. Turning Remember site off removes the saved profile without changing the sound in the current tab.

Compatibility:
Sound Adjuster works with standard HTML audio and video elements. Some websites use cross-origin media, DRM, or other browser security restrictions that prevent extensions from safely processing their audio. In these cases, Sound Adjuster leaves playback unchanged and displays an availability message.

Privacy:
Sound Adjuster operates locally in your browser. It does not collect, transmit, or synchronize user data and does not include analytics or tracking. If you choose to enable Remember site, only the site identifier and its audio settings are stored locally in Firefox extension storage. Private windows and non-HTTP(S) pages do not read or write site profiles.

Sound Adjuster is open-source:
https://github.com/tropicaddons/sound-adjuster

Support:
tropicaddons@proton.me