This extension offers features to improve your user experience on the Udemy website. Attention: These features only appear on the lecture page. Current features: 1. The user can extend video size to fill the entire webpage, similar to Youtube's theater mode. 2. Picture-in-Picture 3. The user can use the mouse to capture an area and then take a screenshot of the selected area. Press Ctrl+C to cancel. 4. The user can adjust the video play speed. To set the minimum and maximum speed and the slider interval, right-click the extension icon and select the option page to update. Udemy may update its code and make the extension features not working. If you encounter any issues or want to contribute to the extension, please visit the repository and open an issue. https://github.com/a90100/udemy-enhancer If this extension greatly improves your experience, please consider giving it a five-star review! If you encounter any issues, please let me know. Thank you!