How to open incognito/private window with Selenium WD for different browser types?

Question

I want to test my test cases in private window or incognito window.

How to do the same in various browsers:

Answer 1

public static void OpenBrowser() {
    if (Browser.equals("Chrome")) {
        System.setProperty("webdriver.chrome.driver", "E:\\Workspace\\proj\\chromedriver.exe");
        DesiredCapabilities capabilities = DesiredCapabilities.chrome();
        ChromeOptions options = new ChromeOptions();
        options.addArguments("incognito");
        capabilities.setCapability(ChromeOptions.CAPABILITY, options);
        driver = new ChromeDriver(capabilities);
    } else if (Browser.equals("IE")) {

        DesiredCapabilities capabilities = DesiredCapabilities.internetExplorer();
        capabilities.setCapability(InternetExplorerDriver.FORCE_CREATE_PROCESS, false);
// if you get this exception "org.openqa.selenium.remote.SessionNotFoundException: " . uncomment the below line and comment the above line
// capabilities.setCapability(InternetExplorerDriver.FORCE_CREATE_PROCESS, true);
        System.setProperty("webdriver.ie.driver", "E:\\Workspace\\proj\\IEDriverServer32.exe");capabilities.setCapability(InternetExplorerDriver.IE_SWITCHES, "-private");
        driver = new InternetExplorerDriver(capabilities);
    } else {
        FirefoxProfile firefoxProfile = new FirefoxProfile();
        firefoxProfile.setPreference("browser.privatebrowsing.autostart", true);
        driver = new FirefoxDriver(firefoxProfile);
    }