Download Greasemonkey

Name: Greasemonkey
Author: Anthony Lieuallen

By: Anthony Lieuallen Add-on

Download Greasemonkey (current and past versions) for Firefox

Latest Version: 4.14 Updated: a month ago

Ready to install?

Greasemonkey is available to install from Firefox Add-ons Store and for download from this page.

View source code

155,962

Daily users

4.2

1,292 ratings

Total downloads

Available versions

You can find the current and older versions of Greasemonkey here. You can download the archived versions or inspect their source codes.

As a free user, you can download up to 3 latest versions.

Upgrade to download older versions

Version	Download	Size	Download count	Timestamp
4.14	XPI · ZIP · Source code	592.90KB	4	2026-06-08
4.13	XPI · ZIP · Source code	615.72KB	29	2024-08-07
4.12.0	XPI · ZIP · Source code	615.51KB	5	2023-12-18
4.11	Paid users only	537.08KB	5	2021-01-28

2026-06-08 · 4 downloads

XPI ZIP Source code

2024-08-07 · 29 downloads

XPI ZIP Source code

2023-12-18 · 5 downloads

XPI ZIP Source code

2021-01-28 · 5 downloads

Paid users only

Install XPI file

An XPI file, short for "XPInstall," is a compressed file format used primarily by Mozilla applications, like Firefox and Thunderbird, to distribute and install add-ons or extensions. These files are similar in function to CRX files for Chrome but cater to the Mozilla ecosystem.

Simply drag-and-drop the XPI into Firefox to install the add-on.

Install ZIP file

Download the Greasemonkey ZIP file.
In Firefox browser, go to about:addons to open Add-ons Manager
Click on ⚙, Install Add-on From File
Select the Greasemonkey ZIP file from step 1. Greasemonkey is now installed on your browser.