YouTube Miniplayer Button Restorer is a Firefox extension designed for web development that enhances the user interface of YouTube. This tool integrates a dedicated miniplayer button seamlessly between the settings and theater mode buttons in the video player, providing easy access to the miniplayer functionality. It supports both old and new YouTube interfaces, ensuring that users can enjoy its features regardless of the version they are using.

The extension allows users to activate the miniplayer mode with a simple click of the button or by pressing the 'i' key on their keyboard. This convenient feature promotes a smoother viewing experience, particularly for those who prefer multitasking while watching videos. As a subscription-based tool, it offers continuous updates and support, making it a valuable addition for web developers and YouTube enthusiasts alike.