package ru.stqa.pft.addressbook.tests;


import org.openqa.selenium.remote.BrowserType;
import org.testng.annotations.AfterMethod;
import org.testng.annotations.BeforeMethod;
import ru.stqa.pft.addressbook.appmanager.ApplicationManager;

public class TestBase {

   protected final ApplicationManager app = new ApplicationManager(BrowserType.FIREFOX);

   @BeforeMethod
   public void setUp() throws Exception {
      app.init();

   }

   @AfterMethod
   public void tearDown() {
      app.stop();
   }

}

package ru.stqa.pft.addressbook.tests;


import org.openqa.selenium.remote.BrowserType;
import org.testng.annotations.AfterMethod;
import org.testng.annotations.BeforeMethod;
import ru.stqa.pft.addressbook.appmanager.ApplicationManager;

public class TestBase {

   protected final ApplicationManager app = new ApplicationManager(BrowserType.CHROME);

   @BeforeMethod
   public void setUp() throws Exception {
      app.init();

   }

   @AfterMethod
   public void tearDown() {
      app.stop();
   }

}

Choose Chrome driver