This article is about the software. For the comic, see Grease Monkey. For other uses, see Grease monkey (disambiguation).
Greasemonkey
Original author(s)
Aaron Boodman
Developer(s)
Anthony Lieuallen, Johan Sundström,[1] 13 more[2]
Initial release
28 March 2005; 19 years ago (2005-03-28)[3]
Stable release
4.11
/ 27 January 2021; 3 years ago (2021-01-27)
Repository
github.com/greasemonkey/greasemonkey
Written in
JavaScript, XUL, CSS
Operating system
Cross-platform
Available in
English
Type
Mozilla extension
License
MIT License
Website
www.greasespot.net
Related articles
Firefox version history
Firefox early version history
v2
v3
v3.5
v3.6
v4
Features of Firefox
Gecko
Add-ons
WebExtensions
Origins and lineage
Netscape Navigator
Mozilla Foundation
Mozilla Suite
Category
v
t
e
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 (also known as augmented browsing).
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 (for example, embedding price comparisons within shopping sites), fixing rendering bugs, combining data from multiple web pages, and numerous other purposes.
^boots (23 August 2009). "Greasespot: Outie". Greasespot.
^"The greasemonkey network graph". GitHub.
^"Version history – GreaseSpot Wiki". wiki.greasespot.net.
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