GeckoDriver (Firefox)

Firefox driver is included in the selenium-server-standalone.jar available in the Selenium downloads. The driver comes in the form of an xpi (firefox extension) which is added to the firefox profile when you start a new instance of FirefoxDriver.

Available CLI arguments

These can be found on the FirefoxDriver page.

Settings for the Firefox profile, which can be set via the desiredCapabilities, can be found here.