Introduction To Selenium 3.0: An Upgradation Using GeckoDriver

Selenium 2.0 was released in 2011 and introduced the new WebDriver APIs that encouraged everyone to start moving to them. Selenium 3.0 is a simple drop-in upgrade version if you're currently using the WebDriver APIs. 

None of the WebDriver APIs have been changed, and the code is essentially the same as the last 2.x release. Even if you're using Selenium Grid, the same applies: in most cases, you can just drop in the new JAR, and you're done.

Read More Here at https://www.bugraptors.com/blog/introduction-selenium-3-0-upgradation-using-geckodriver/