selenium can open the browser but the page is blank without entering the URL

A novice like me is constantly stepping on the pit in the process of learning.

Today, I am running a simple python+selenium test demo to open the Firefox browser and enter the Baidu URL.

import time
from selenium import webdriver

browser = webdriver.Firefox()
url = "http://wwww.baidu.com"
browser.get(url)
browser.find_element_by_id("kw").send_keys("selenium")
browser.find_element_by_id("su").click()
time.sleep(3)
browser.quit()

　　

Found that the browser can be opened normally. But does the page really look like this?

 

It was a bit confusing at the time, because the program ran fine before. The browser and Baidu can be opened normally.

I installed python2.7+selenium2.53.6+Firefox45.

Then Baidu took a look. It turned out that this happened because the selenium version did not match the version of the Firefox browser.

Then I checked my Firefox browser, F**K, it turned out that it was automatically upgraded to Firefox47.

After uninstalling version 47 and reinstalling version 45, the program runs normally.

Selenium2 can support Firefox browser version 45 and below.