Greasemonkey 4.0 freeware

New Version

Greasemonkey is a Firefox extension that allows you to customize the way webpages look and function.
Greasemonkey can be used for adding new functions to web pages (for example, embedding price comparisons within shopping sites), fixing rendering bugs, combining data from multiple webpages, and numerous other purposes.

Author Aaron Boodman
Released 2017-02-27
Filesize 113 kB
Downloads 1234
OS Windows XP, Windows Vista, Windows 7, Windows 8
Installation Instal And Uninstall
Keywords Firefox extension, display webpage, display customizer, customization, extension, add-on
Users' rating
(10 rating)
Greasemonkey - Freeware Download Notice

Greasemonkey Free Download - we do not host any Greasemonkey torrent files or links of Greasemonkey on,, etc. All Greasemonkey download links are direct Greasemonkey download from publisher site or their selected mirrors.

Greasemonkey freeware - The Latest User Reviews
Greasemonkey freeware - The Latest Versions History
4.0 Feb 27, 2017 New Release Greasemonkey has been a Firefox extension for well over a decade, with version 0.3.5 dating from 2005. We've grown and changed a lot over that time. With the upcoming Firefox 57 release, we need to change even more. Mozilla is completely replacing the extension system in Firefox, to align with the budding Browser Extension standard, based on/shared with Google Chrome.
As a result, version 4 of Greasemonkey is a nearly complete re-write. Its interface and feature set have been rebuilt in order to best to work with coming Firefox versions. A variety of compromises have been made. We've elected to make a rare backwards incompatible change.
3.10 Feb 27, 2017 New Release Fixed bugs:
Fix compatibility with Firefox 54.
3.9 Jan 2, 2017 New Release Feature enhancements:
Improve the performance of GM_getValue/GM_setValue. (#2197, #2025)
Add a rich tooltip to the Greasemonkey toolbar button. (#2377, #2418)
GM_getResourceText supports a second (responseType) parameter, for better compatibility with binary files. (#2376)

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