Soundup Sound Booster

Users appreciate Soundup Sound Booster for its high-quality volume amplification, ease of use, and practical features like slider control and frequency manipulation, all without ads or cost. Multiple reviews mention its smooth and effective sound boosting and user-friendly interface. However, common drawbacks include the absence of bass control and frequency adjustment options, the extension's failure to remember user settings, and the lack of keyboard shortcuts. Users also express a desire for the extension to be available on other browsers and mobile platforms.