Opening the chrome driver and browser on a specific port, and connecting to already opened chrome browser.

Praveen David Mathew
2 min readMar 13, 2020


This article helps you in understanding how to start chrome driver on a specific port, connect to an existing browser session and opening chrome browser with debug port opened through selenium scripts.

You should use ChromeDriverService for starting chrome in a different port:

import;      import;      import;      import org.openqa.selenium.remote.RemoteWebDriver;     
WebDriver browser = null; ChromeDriverService service = new ChromeDriverService.Builder() .usingDriverExecutable(new File("C:\\chromedriver.exe")) .usingPort(4444) .build(); service.start(); browser = new RemoteWebDriver(service.getUrl(), new ChromeOptions());

Once your tests are done, make sure to close the browser and the service:

browser.quit()  service.stop()

Else the port remains open.




Praveen David Mathew

An open source advocator/WebdriverIO Projectcommiter/Postman Supernova/Postman-html-extra contributor/Stack overflow sqa moderator/Speaker