The QR Code Reader is a powerful extension for Firefox that enables users to scan various types of QR codes and barcodes directly from their browser. Supporting a wide range of symbologies, including EAN-13, UPC-A, and Code 128, this tool offers versatility for both casual and professional use. Users can scan codes using their device's camera or upload local images, with a history feature that retains the last 20 scanned items for easy reference.

This extension operates without relying on external services, ensuring that all processing is done locally for enhanced privacy and speed. Utilizing the ZBar c-library, it can detect multiple codes in a single image, making it an efficient choice for users needing to manage various barcodes in one go. Overall, the QR Code Reader stands out for its comprehensive features and user-friendly interface.