I noticed that gestures with smartUp Gestures don't work when you start drawing a gesture over certain page elements. As an example, image search on duckduckgo – to make a gesture work with smartUp Gestures you need to start drawing it in the space between images. No need for that with Gesturefy, works everywhere!

If possible, I would like to see in future an option to have a smooth scrolling animation when performing actions "scroll to top/bottom".