使用Selenium WebDriver时如何知道我使用的浏览器类型？

from selenium import webdriver

driver = webdriver.Chrome()
capabilities = driver.capabilities
browser_name = capabilities['browserName']
browser_version = capabilities['browserVersion']
print("Browser Name:", browser_name)
print("Browser Version:", browser_version)

from selenium import webdriver

driver = webdriver.Chrome()
browser_name = driver.name
print("Browser Name:", browser_name)

from selenium import webdriver

driver = webdriver.Chrome()
browser_name = driver.execute_script('return navigator.userAgent')
print("Browser Name:", browser_name)