* '''SAUCE_FIREFOX_VERSION_MAC''' - The default Firefox version to use for OS X [http://saucelabs.com/ Sauce Labs] jobs.
* '''SAUCE_FIREFOX_VERSION_WINDOWS''' - The default Firefox version to use for Windows [http://saucelabs.com/ Sauce Labs] jobs.
* '''SAUCE_MAC_VERSION''' - The default OS X version for [http://saucelabs.com/ Sauce Labs] jobs.
* '''SAUCE_WINDOWS_VERSION''' - The default Windows version for [http://saucelabs.com/ Sauce Labs] jobs.
* '''SELENIUM_HOST''' - The host running the remote Selenium server or hub. The default is '''selenium-hub1.qa.scl3.mozilla.com'''.