Web Video Speed Controller is a versatile Firefox extension designed to enhance online video playback. With compatibility for platforms like YouTube and Vimeo, it allows users to adjust video speeds from 0.01x to 16x, catering to diverse viewing preferences. The extension offers a floating user interface along with customizable keyboard shortcuts and mouse controls, ensuring a user-friendly experience for everyone.

This subscription-based extension is available for free and includes features like the ability to remember speed settings across different videos. Users can personalize their interface by selecting from various themes and display styles, making it not only functional but also visually appealing. Overall, Web Video Speed Controller provides a comprehensive solution for anyone looking to optimize their video watching experience.