グリーンチャンネルWeb Fullwindow Enabler is a free Chrome add-on developed by けーさん. This add-on maximizes videos to the entire window, allowing for a larger and more immersive viewing experience. It eliminates the need for fullscreen mode, which can often be obstructive. The add-on also includes a feature to perfectly fit the window to the video's aspect ratio, providing a seamless viewing experience. With a simple right-click, a menu appears to access these functionalities.

This add-on is especially useful for watching missed broadcasts or library videos. It enhances the viewing experience by maximizing the video without the limitations of picture-in-picture mode.

Additionally, the add-on assigns the "w" key as a keyboard shortcut to enter full window mode, ensuring a consistent user experience. However, please note that this extension may not be necessary for macOS users, as similar functionality is already available by default.

Please note that this review is based solely on the information provided and does not reflect personal opinions or judgments.