Guitar Tuner 作者： Korneliusz Tryzna

Guitar Tuner is a lightweight chromatic tuner for Firefox. It listens to your instrument through the microphone, detects pitch in real time, and shows the nearest note with cents offset and a tuning needle. The extension supports microphone selection, input gain control, and live input level monitoring. It is designed for quick tuning in a small popup window with no account, no cloud backend, and no data collection.