Private and Incognito Mode

Selenium can open the browsers in Private mode.

In order to open the browser in private mode, use the Desired Capabilities applicable to the browser.

Chrome

DesiredCapabilities dc = new DesiredCapabilities();

// ...

ChromeOptions options = new ChromeOptions();
options.addArguments("--incognito");
dc.setCapability("goog:chromeOptions", options);

RemoteWebDriver driver = new RemoteWebDriver(new URL(URL), dc);

Firefox

DesiredCapabilities dc = new DesiredCapabilities();

// ...

FirefoxOptions options = new FirefoxOptions();
options.addArguments("--private");
dc.setCapability("moz:firefoxOptions",options);

RemoteWebDriver driver = new RemoteWebDriver(new URL(URL), dc);

Microsoft Edge

DesiredCapabilities dc = new DesiredCapabilities();

// ...

Map<String, Object> edgeOptions = new HashMap<>();
edgeOptions.put("args", ImmutableList.of("-inprivate"));
dc.setCapability("ms:edgeOptions", edgeOptions);

RemoteWebDriver driver = new RemoteWebDriver(new URL(URL), dc);