Magic actions for YouTube is a wonderful enhancement to any video viewing experience.
Everything you love, now in one App! AutoHD, Ad Block, Cinema mode with Dynamic backlight, Mouse Wheel for Volume Control, Snapshot from playing video, Cool Day/Night toggle switch to browse YouTube in black or white, Stop Autoplay, Auto Wide, Display user info in comments, Auto Replay, Ratings preview, Enlarge avatars and video thumbnails, Ability to hide comments, related videos, etc. More Info »
Magic actions for YouTube is available as a browser extension for Firefox and Opera.