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Select the right version of GeckoDriver for the operating system being used.Downloading and Installing GeckoDriverĭownload GeckoDriver as an executable file by following the steps below: They can use the same WebDriver for multiple versions of Firefox. Because of this, Selenium users do not have to create a new version of WebDriver to test every browser version. GeckoDriver uses W3C (the universally defined standard) WebDriver protocol to communicate with Selenium. Using GeckoDriver instead of the default Firefox driver provides a major advantage in terms of compatibility. This starts a server on the system and all tests communicate with this server to run the tests. Firefox implements WebDriver protocol using the executable file GeckoDriver.exe. GeckoDriver has to exist as an executable file in one of the system paths before starting Selenium tests. But since Selenium 3 does not have any native implementation of Firefox, all driver commands have to be directed through GeckoDriver. Before Selenium 3, Firefox was the default browser for the automation framework.