Scriptish

The greatest user script engine on the Internet. Scriptish is a fork of Greasemonkey, offering: Everything Greasemonkey does (which is actually useful) Updating: User scripts can be updated in Scriptish using @updateURL Many new metadata @keys Many new additions to the GM_ API Superior Performance: A FASTER, cleaner code base which takes advantage of all that Firefox 4 has to offer Superior Security: Scriptish provides security features you won`t find elsewhere Mobile: Supports Fennec