The nicovideo-comfortable-controller-fader is a Chrome extension designed to improve the viewing experience on NicoNico Douga by managing the visibility of the player controller. This tool offers a seamless fade-in and fade-out effect for the video controller, ensuring that the controller does not obstruct the video content. It intelligently keeps the controller visible while the mouse is over the player or controller, and fades it out when the mouse moves away, allowing for an uninterrupted viewing experience.

This extension is particularly useful for users who have experienced issues with the controller remaining visible after interacting with the player. The tool keeps the controller displayed for a few seconds after the mouse leaves the player area and also maintains visibility for a brief period after the player loads, enhancing user comfort while watching videos. The nicovideo-comfortable-controller-fader is a free add-on that caters specifically to NicoNico Douga users looking for a cleaner interface.