"I've Seen This Before" is a free Chrome add-on developed by gykk. It falls under the category of Browsers and is specifically listed in the Add-ons & Tools subcategory.

This add-on allows users to mark contents as seen on Disney+. With "I've Seen This Before," you can keep track of the shows and movies you have watched on Disney+. It offers features such as automatic marking of watched content, auto skip intro and recap, autoplay next episode, and automatically marking previously watched series episodes. Additionally, it provides the option to set full-screen mode for a more immersive viewing experience.

With its simple and intuitive interface, "I've Seen This Before" makes it easy to manage your watched content on Disney+. Whether you want to keep track of your progress or simply want to avoid rewatching content, this add-on is a handy tool for Disney+ users.