代码：
from selenium import webdriver
from selenium.webdriver.firefox.firefox_binary import FirefoxBinary
import time
caps = webdriver.DesiredCapabilities().FIREFOX
caps["marionette"] = True
binary = FirefoxBinary(r'E:\firefoxBro\firefox.exe')
# 把上述地址改成你电脑中Firefox程序的地址
driver = webdriver.Firefox(firefox_binary=binary, capabilities=caps)
driver.get("http://www.santostang.com/2017/03/02/hello-world/")
#如果不加以下的东西是没问题的
driver.switch_to.frame(driver.find_element_by_css_selector("iframe[title='livere']"))
comments = driver.find_elements_by_css_selector('div.reply-content')
for eachcomment in comments:
content = eachcomment.find_element_by_tag_name('p')
print(content.text)
报错：
selenium.common.exceptions.WebDriverException: Message: Failed to decode response from marionette