New session opens with some url by default

Hi, Could you please help me with below issue.
When I write below code and run it, new firefox session opens with 2 tabs on it and second tab automatically opens https://support.skype.com/en/faq/FA34612/what-is-the-skype-extension

code:

public class Test3 {

public static void main(String[] args) {

WebDriver driver = new FirefoxDriver();
}
}