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Locally change the way a page looks or works using javascript.

Greasemonkey user scripts are written in JavaScript and manipulate the contents of a web page using the Document Object Model interface. Scripts are generally written to be either page-specific or domain-specific (applying to all pages within a domain) but may also be tagged to apply to all domains for global browser enhancements. Users of Greasemonkey can write or download scripts and save them to their own personal library. When users visit a website matching a script in their personal script library, Greasemonkey invokes the relevant scripts.


version 3.7 (mature)
released on 19 February 2016

User level


VCS Checkout

git clone


Related Projects

Extension or Plugin

This package can be used as an extension, plugin, or add-on to:

Extensions, plug-ins, or add-ons for this program

Anti-Adblock Killer ContinuedAnti-Adblock Killer Continued
Linterna MágicaFlash replacement
ViewTubeViewTube is a JavaScript application that allows viewing videos from video sharing web sites without needing to install Adobe Flash Player
ViewTubePlusThe only free software to play gratis adult videos
Youtube High DefinitionAutomatically set video quality to maximum available!



Verified by

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17 April 2015

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17 April 2015

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17 April 2015

Leaders and contributors

Resources and communication

AudienceResource typeURI
Debian (Ref) (R)

Software prerequisites

Required to useIcecat
{{{Prerequisite description}}}

This entry (in part or in whole) was last reviewed on 13 February 2018.


Property "Submitted by" (as page type) with input value "{{{Submitted by}}}" contains invalid characters or is incomplete and therefore can cause unexpected results during a query or annotation process.
"{{{Submitted date}}}" contains an extrinsic dash or other characters that are invalid for a date interpretation.

"Debian (Ref) (R)" is not in the list (General, Help, Bug Tracking, Support, Developer) of allowed values for the "Resource audience" property.

"{{{Prerequisite kind}}}" is not in the list (Required to use, Required to build, Source requirement, Weak prerequisite) of allowed values for the "Prerequisite kind" property.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the page “GNU Free Documentation License”.

The copyright and license notices on this page only apply to the text on this page. Any software or copyright-licenses or other similar notices described in this text has its own copyright notice and license, which can usually be found in the distribution or license text itself.