Greasemonkey Logotype Preview
Learn more about the Greasemonkey brand, find out the Greasemonkey colors, and download a Greasemonkey vector logo in the SVG file format.
Greasemonkey is a userscript manager made available as a Mozilla Firefox extension. It enables users to install scripts that make on-the-fly changes to web page content after or before the page is loaded in the browser. The changes made to the web pages are executed every time the page is viewed, making them effectively permanent for the user running the script. Greasemonkey can be used for customizing page appearance, adding new functions to web pages, fixing rendering bugs, combining data from multiple web pages, and numerous other purposes.