The YouTube Not Interested Button is a Firefox addon designed to improve user interaction on the platform. This addon introduces two additional buttons on YouTube video tiles: 'Not interested' and 'Don't recommend channel'. These features allow users to customize their viewing preferences more effectively, helping to refine the recommendations they receive based on personal taste.

In addition to the functionality of the new buttons, users have the flexibility to modify their settings through the addon preferences. This includes options to disable either button or change the labels of the buttons to better suit individual needs. Overall, this addon serves as a useful tool for those looking to have greater control over their YouTube content recommendations.