import time
from selenium import webdriver
browser = webdriver.Chrome()
browser.get("https://www.baidu.com/")
browser.get("https://www.taobao.com/")
browser.get("https://www.sina.com/")
# 后退
browser.back()
time.sleep(5)
# 前进
browser.forward()
time.sleep(3)
browser.close()