Install SlimerJS on your computer

SlimerJS runs on any platform on which Firefox is available.

This download page offers you different way to install SlimerJS:

  • Install a package from your favorite package system. It will install all needed files. See known repositories below.
  • Or download the official package of SlimerJS: this is a zip package containing SlimerJS, that you can use with all operating system. You have to install Firefox separately.

SlimerJS is released under the Mozilla Public Licence 2.0 which is compatible with the Gnu Public Licence. This is a free software.

Note: a "Standalone Edition" existed with version 0.9 and lower, containing SlimerJS and XulRunner, the Firefox runtime. But Mozilla cease to build XulRunner (latest release was 40.0) and even removed the source code from the Firefox source trees. Starting with SlimerJS 0.10, you have to install Firefox to use it.

It is compatible with Firefox from 53.0 to 59.0.

Zip/bz2 packages

From github

zip tar.bz2


zip tar.bz2

See the page about checksum to know how to verify the packages.


This npm package provides SlimerJS. Just type in a console:

npm install slimerjs

You can then launch slimerjs with ./node_modules/.bin/slimerjs.


The Famous Web Browser.

SlimerJS needs it to open webpage and executes your script. It uses in fact the core of Firefox. Prefered version: 53.0 to 59.0.

Launching SlimerJS requires additional setup actions. See the documentation.


Here are known repositories from where SlimerJS can be installed.


  • The version proposed in these repositories may not be the latest stable one
  • SlimerJS's developer is not responsible of these packages and their content.
  • If something goes wrong with these packages, contact the package owner first, not the SlimerJS's developer.


This package system for OS X has a formula to install SlimerJS. Type in a console:

brew install slimerjs

You have to install Firefox separately and set the SLIMERJSLAUNCHER environment variable. See the documentation to set it.


For Windows user, you can use Nuget to download and install SlimerJS. See packages SlimerJS or NetSlimerJS.

PM> Install-Package SlimerJS 

Docker image

A Docker image containing Ubuntu + SlimerJS + CasperJS is available here.

If you created or found packages of Slimerjs into some others package repositories, please tell us!

If you want to test futures versions of SlimerJS, some packages are available. Please help us by trying these versions and reporting issues on github ;-). Of course, it is not recommended to use them in production.