Selenium WebDriver Accessing BrowserBack And ForwardButtons code

driver.findElement(By.xpath("//div[@id='nav-top-bar']/ul/li[2]/a/span")).click();
driver.findElement(By.xpath("//*[@id='nav-top-bar']/ul/li[3]/a/span")).click();


driver.navigate().back();
driver.navigate().back();



driver.navigate().forward();
driver.navigate().forward();