代码：

coding = utf-8

from selenium import webdriver
browser = webdriver.Firefox()
browser.get("http://www.baidu.com")
browser.find_element_by_id("kw").send_keys("selenium")
browser.find_element_by_id("su").click()
browser.quit()

报错：
C:\Users\Administrator\AppData\Local\Programs\Python\Python35\python.exe C:/Users/Administrator/PycharmProjects/untitled/webtest/test_1.py
Traceback (most recent call last):
File "C:/Users/Administrator/PycharmProjects/untitled/webtest/test_1.py", line 3, in
browser = webdriver.Firefox()
File "C:\Users\Administrator\AppData\Local\Programs\Python\Python35\lib\site-packages\selenium\webdriver\firefox\webdriver.py", line 154, in init
keep_alive=True)
File "C:\Users\Administrator\AppData\Local\Programs\Python\Python35\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 140, in init
self.start_session(desired_capabilities, browser_profile)
File "C:\Users\Administrator\AppData\Local\Programs\Python\Python35\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 229, in start_session
response = self.execute(Command.NEW_SESSION, parameters)
File "C:\Users\Administrator\AppData\Local\Programs\Python\Python35\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 297, in execute
self.error_handler.check_response(response)
File "C:\Users\Administrator\AppData\Local\Programs\Python\Python35\lib\site-packages\selenium\webdriver\remote\errorhandler.py", line 194, in check_response
raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.WebDriverException: Message: connection refused