Greasemonkey is a Firefox extension that allows you to customize the way webpages look and function.



Scriptish is described as 'Forked off Greasemonkey because enough developers felt its development had grown stagnant' and is an app in the development category. There are three alternatives to Scriptish for a variety of platforms, including Mozilla Firefox, Microsoft Edge, Google Chrome, Opera and Chromium apps. The best Scriptish alternative is Greasemonkey, which is both free and Open Source. Other great apps like Scriptish are Violentmonkey and Tampermonkey.
Greasemonkey is a Firefox extension that allows you to customize the way webpages look and function.



Violentmonkey provides userscript support for Chrome, Opera, Maxthon and Firefox supporting most scripts for Greasemonkey and Tampermonkey.



Tampermonkey is a free browser extension and the most popular userscript manager for Blink- and WebKit-based Browsers like Chrome, Opera Next and Safari.



