Selenium 1.0 + WebDriver = Selenium 2.0
WebDriver is designed in a simpler and more concise programming interface along with addressing some limitations in the Selenium-RC API.
It’s a compact Object Oriented API when compared to Selenium1.0
It drives the browser much more effectively and over comes the limitations of Selenium 1.x which affected our functional test coverage, like the file upload or download, pop-ups and dialogs barrier
It overcomes the limitation of Selenium Rc’s Single Host origin policy
The implementing classes one should use are listed as below:
AndroidDriver, ChromeDriver, EventFiringWebDriver, FirefoxDriver, HtmlUnitDriver, InternetExplorerDriver, IPhoneDriver, PhantomJSDriver, RemoteWebDriver, SafariDriver.