Customize the way a web page displays or behaves, by using small bits of JavaScript.

Greasemonkey is available to install from Firefox Browser Add-ons and for download from this page. It has 196,875 active users The latest version is 4.12.0, and it was published 4 months ago.

View source code
Total download count: 6 (Only count downloads from Firefox-Stats)
Install Greasemonkey from Firefox Browser Add-ons
All 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 only download the latest version.

Upgrade to download older versions
Version Download Size Download count Timestamp
4.12.0 Sign in to download 630.29K 3 2023-12-19
Upgrade to download older files
549.97K 3 2022-08-02
How to install Greasemonkey from an XPI file
  1. Simply drag-and-drop the XPI into Firefox to install the add-on.
How to install Greasemonkey from a ZIP file
  1. Download the Greasemonkey ZIP file
  2. In Firefox browser, go to about:addons to open Add-ons Manager
  3. Click on , then select Install Add-on From File
  4. Select the Greasemonkey ZIP file from step 1. Greasemonkey is now installed on your browser.