Greasemonkey

Greasemonkey
Original author(s)Aaron Boodman
Developer(s)Anthony Lieuallen, Johan Sundström,[1] 13 more[2]
Initial release28 March 2005 (2005-03-28)[3]
Stable release
4.11 / 27 January 2021 (2021-01-27)
Repository
Written inJavaScript, XUL, CSS
Operating systemCross-platform
Available inEnglish
TypeMozilla extension
LicenseMIT License
Websitewww.greasespot.net

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.

  1. ^ boots (23 August 2009). "Greasespot: Outie". Greasespot.
  2. ^ "The greasemonkey network graph". GitHub.
  3. ^ "Version history – GreaseSpot Wiki". wiki.greasespot.net.

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