10ten Japanese Reader Rikaichamp is a powerful extension designed for Firefox that enhances the learning experience for Japanese language users. By simply hovering over Japanese text, users can access a popup with dictionary definitions, making it an invaluable tool for students and those looking to improve their language skills. The extension supports a variety of features such as pitch accent information, automatic dictionary updates twice a week, and translations for Japanese yen amounts, numbers, and era years, ensuring users have a comprehensive resource at their fingertips.

In addition to its core functionality, 10ten Japanese Reader supports a wide range of grammatical forms and offers kanji stroke order animations, making it easier for users to grasp complex characters. The extension is localized in both Japanese and Simplified Chinese, providing a more immersive learning environment. With minimal memory usage and support for diverse web content, 10ten Japanese Reader aims to remain a reliable and fast tool for anyone interested in mastering the Japanese language.