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.
  • Or do nothing if you want to use it in CodeShip. It's available on this continuous deployment platform.

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 38.0 to 49.0.

Note: you can verify the file by checking its checksum.

Download (about 470 KB)

This package needs additional setup actions

  • You must install Firefox separately
  • Launching SlimerJS requires additional setup actions. See the documentation.


The Famous Web Browser. SlimerJS needs only its core engine to be executed. Prefered version: 38.0 to 49.0.


This is probably the prefered way if you use a package system. 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.


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

npm install slimerjs

It will detect your platform and download the standalone package. You can then launch slimerjs with ./node_modules/.bin/slimerjs.

Docker image

A Docker image containing Ubuntu 12.04 + SlimerJS + CasperJS 1.1.0-beta3 is available here.


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

PM> Install-Package SlimerJS 

For others distributions, your contribution is welcomed ;-). Or tell us if you found SlimerJS somewhere else!

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.