How to fix Selenium WebDriverException: The browser appears to have exited before we could connect?

Question

I have installed firefox and Xvfb on my centos6.4 server to use selenium webdriver.

But, when I run the code, I got an error.

from selenium import webdriver

browser = webdriver.Firefox()

Error

selenium.common.exceptions.WebDriverException: Message: 

'The browser appears to have exited before we could connect. The output was: None'

I read some related pages on stackoverflow and someone suggested to remove all files in tmp folder, so I did it. But, it still doesn't work.

Could anyone please give me a help?

Thank you in advance!

Edit

 Traceback (most recent call last):

  File "<stdin>", line 1, in <module>

  File "/usr/local/lib/python3.4/site-packages/selenium/webdriver/firefox/webdriver.py", line 59, in __init__

    self.binary, timeout),

  File "/usr/local/lib/python3.4/site-packages/selenium/webdriver/firefox/extension_connection.py", line 47, in __init__

    self.binary.launch_browser(self.profile)

  File "/usr/local/lib/python3.4/site-packages/selenium/webdriver/firefox/firefox_binary.py", line 64, in launch_browser

    self._wait_until_connectable()

  File "/usr/local/lib/python3.4/site-packages/selenium/webdriver/firefox/firefox_binary.py", line 103, in _wait_until_connectable

    self._get_firefox_output())

selenium.common.exceptions.WebDriverException: Message: 'The browser appears to have exited     before we could connect. The output was: None' 

 

Answer 1

If its a Python code, then you are required to install Xvfb and then pyvirtualdisplay.

PS: It worked for me on my Ubuntu server.

sudo apt-get install xvfb

sudo pip install pyvirtualdisplay

//Once you have done that, the python code should work:

#!/usr/bin/env python

from pyvirtualdisplay import Display

from selenium import webdriver

display = Display(visible=0, size=(1024, 768))

display.start()

browser = webdriver.Firefox()

browser.get('http://www.ubuntu.com/')

print browser.page_source

browser.close()

display.stop()

Hope this helps!

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