One of the smallest but great add-on's for FireFox! Rated 5 out of 5 stars
Great addon and is a very effective add-on. Simply press your right mouse button and move your mouse movement to scroll. This feature is something that should of been in browsers by default many moons ago. Great add-on that uses a very tiny amount of background resources. Must have add-on... Microsoft,Chrome,Opera and FireFox dev's take notice!!
PS: Does have options to change to a different mouse button and a few other options. Would like to see more options added but hey..its great the way it is because its not a resource hog, those things tend to add up over time the more things you add.