Lisäosan Improve YouTube! (Open-Source for YouTube) yksityisyyskäytäntö
extension runs offline completely.
( seems Firefox wants us to mention this "cookie" here? : - two of our features are capable of modifying www.youtube.com's cookie (only if you click them: 1. "delete youtube cookie" 2. "change youtube language" (one of www.youtube.com's cookie's parameters) )