Mozilla's Selenium Grid configuration
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Configuration and launch scripts for Mozilla's Selenium Grid environment.


  1. Java Runtime Environment
  2. ANT


Default properties are set in, and these can be overridden for an individual machine by providing a <HOSTNAME>.properties file. Any properties in this file will override the default. To find out your hostname run ant debug in the location you've checked out this project and look for something that looks like the following line:

[echoproperties] env.HOSTNAME=LokiMac.local

In this example the hostname is LokiMac.local so your properties file will be

The hub configuration is stored in hub_configuration.json.


Below are the properties that can be configured:


The version number of Selenium to use. This is used to locate the library, for example a value of 2.0rc2 will load the library lib/selenium-server-standalone-2.0rc2.jar

The host that the hub is running on. This is used when registering nodes with the hub.


The port that the hub is running on. Also used when registering nodes with the hub.


Configuration file for the Selenium node, including browser capabilities.


Any additional arguments to pass to an RC node when it's launched. For example, -singleWindow would launch the Selenium and the application under test in the same window using frames.


The path of a custom Firefox profile to use. If this property is specified but the value is empty then Selenium will not provide the -firefoxProfileTemplate command line argument and a fresh profile will be generated. Note that the Firefox profile needs to be located in firefoxprofiles directory, and the value of this property is the relative path within firefoxprofiles.

Launching a Selenium hub

Run the following command from the project's location:

ant launch-hub

Launching a Selenium WebDriver node

Run the following command from the project's location:

ant launch-webdriver

Launching a Selenium RC node

Run the following command from the project's location:

ant launch-remote-control

Specifying properties on the command line

You can override any of the properties from or <HOSTNAME>.properties on the command line by passing them in the format -D<PROPERTY>=<VALUE>. For example, to specify a custom firefox profile for an RC node you would use ant launch-remote-control -Dcustom.firefox.profile=myProfile


This software is licensed under the Mozilla Tri-License:

Version: MPL 1.1/GPL 2.0/LGPL 2.1

The contents of this file are subject to the Mozilla Public License Version
1.1 (the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at

Software distributed under the License is distributed on an "AS IS" basis,
WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
for the specific language governing rights and limitations under the

The Original Code is Mozilla WebQA.

The Initial Developer of the Original Code is Mozilla.
Portions created by the Initial Developer are Copyright (C) 2011
the Initial Developer. All Rights Reserved.

  Dave Hunt <>

Alternatively, the contents of this file may be used under the terms of
either the GNU General Public License Version 2 or later (the "GPL"), or
the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
in which case the provisions of the GPL or the LGPL are applicable instead
of those above. If you wish to allow use of your version of this file only
under the terms of either the GPL or the LGPL, and not to allow others to
use your version of this file under the terms of the MPL, indicate your
decision by deleting the provisions above and replace them with the notice
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