Portable Playlists for YouTube™ is a Chrome add-on developed by ゆらふか. It allows users to open their YouTube playlists in a small window. With this add-on, users can conveniently access their playlists without having to navigate away from their current browsing session.

The main feature of Portable Playlists for YouTube™ is the ability to display the user's YouTube account playlist in a pop-up window. This allows users to continue browsing the web while still having easy access to their favorite YouTube playlists. The add-on also includes a feature where the user's account icon is displayed in the top-right corner of the screen when logged in.

Overall, Portable Playlists for YouTube™ provides a handy solution for YouTube users who want quick access to their playlists without interrupting their browsing experience. It is a free add-on available on the Chrome platform, making it easily accessible to a wide range of users.