The ability to install simple scripts that can do just about anything with any web page or set of web pages, ranging from cosmetic fixes, to silly alterations, to adding features and repairing broken code, is an unbelievably powerful thing. And the fact that they can be installed in just a few seconds, without the overhead of whole add-ons and possibly having to restart the browser, is great too.
Why is this even still available??? Without the "new user script" option working (which it is not) the entire thing is completely useless as there is no way to add a script which is the entire purpose of installing Greasemonkey. It has been this way for many months now, possibly a year or more....yet the author has updated as recently as September 7? What the hell???