Selenium uses W3C Webdriver protocol to send requests to GeckoDriver, which translates them into a protocol named Marionette. After Selenium 3, testers need to initialize the script to use Firefox using GeckoDriver explicitly. In short, Gecko driver acts as a link between Selenium Web Driver tests and Mozilla Firefox browser.īefore Selenium 3, Mozilla Firefox browser was the default browser for Selenium. Gecko driver acts as a proxy between Web Driver enabled clients(Eclipse, Netbeans, etc.) and Mozilla Firefox browser. The term Gecko stands for a Web Browser engine that is inbuilt within Mozilla Firefox browser.
