File "<pyshell#1>", line 1, in <module>
   driver = webdriver.Firefox()
 File "C:\Anaconda3\lib\site-packages\selenium\webdriver\firefox\webdriver.py", line 103, in __init__
   self.binary, timeout)
 File "C:\Anaconda3\lib\site-packages\selenium\webdriver\firefox\extension_connection.py", line 51, in __init__
   self.binary.launch_browser(self.profile, timeout=timeout)
 File "C:\Anaconda3\lib\site-packages\selenium\webdriver\firefox\firefox_binary.py", line 68, in launch_browser
   self._wait_until_connectable(timeout=timeout)
 File "C:\Anaconda3\lib\site-packages\selenium\webdriver\firefox\firefox_binary.py", line 98, in _wait_until_connectable
   raise WebDriverException("The browser appears to have exited "

>>> from selenium import webdriver >>> driver = webdriver.Firefox() Traceback (most recent call last): File "<pyshell#1>", line 1, in <module> driver = webdriver.Firefox() File "C:\Anaconda3\lib\site-packages\selenium\webdriver\firefox\webdriver.py", line 103, in __init__ self.binary, timeout) File "C:\Anaconda3\lib\site-packages\selenium\webdriver\firefox\extension_connection.py", line 51, in __init__ self.binary.launch_browser(self.profile, timeout=timeout) File "C:\Anaconda3\lib\site-packages\selenium\webdriver\firefox\firefox_binary.py", line 68, in launch_browser self._wait_until_connectable(timeout=timeout) File "C:\Anaconda3\lib\site-packages\selenium\webdriver\firefox\firefox_binary.py", line 98, in _wait_until_connectable raise WebDriverException("The browser appears to have exited " selenium.common.exceptions.WebDriverException: Message: The browser appears to have exited before we could connect. If you specified a log_file in the FirefoxBinary constructor, check it for details. >>> It was working fine recently but my latest Firefox upgrade (47) seems to block it. What to do? Oh by the way same selenium is working fine with Chrome.