Greasemonkey has existed for less than a year, and hundreds of people have already written thousands of Greasemonkey scripts to scratch their own personal itches. Web enthusiasts with zero JavaScript experience have written scripts to route around broken web sites, alter site styles, and roll back ill-conceived site redesigns. More experienced coders have created link trackers, password managers, and personal shopping agents. Some have even added entirely new features to complex web applications--without ever needing to talk to the application developers or wait for bureaucratic approval.

Clearly, there were a lot of itches waiting to be scratched.