Audio Only for YouTube is a Firefox add-on designed for users who prefer audio content over video. This tool effectively prevents YouTube videos from loading, enabling only the audio stream to play. By doing so, it helps save bandwidth and battery life, making it an excellent choice for those in low-data situations. The add-on is equipped with a simple ON/OFF toggle button that indicates its status through color coding—red for active and light grey for inactive. This functionality allows users to easily switch modes, albeit requiring a page reload to take effect.

The add-on supports a variety of YouTube services, including YouTube Music and embedded videos, while utilizing HTML5 video elements. However, it does come with limitations, such as the inability to change audio quality settings and a lack of support for live content. Users will see a static background when the video is disabled, ensuring a clean interface while enjoying their audio experience.