Rated 5 out of 5 stars
This is, without a doubt, the best smooth scrolling add-on for Firefox. I consider this to be an essential add-on because it enables one to actually read the page while scrolling which greatly improves productivity and usability. Mozilla would be very wise to "pre-install" this add-on to Firefox, it's that great!
Do yourself a huge favor, install this add-on and take a minute or two to configure it to your liking, you'll soon wonder how you could ever live without it.