E.Z. E.Z. - 1 year ago 2115
Python Question

Selenium WebDriver: Firefox starts, but does not open the URL

I've just installed Selenium for the first time, and I'm having trouble to get started.

Installation went fine with


pip install selenium

And I can
import selenium
within Python.

Now I'm trying to run the following sample script:

from selenium import webdriver
driver = webdriver.Firefox()
assert "Python" in driver.title

What happens is that Firefox opens, but it does not navigate to "http://www.python.org" (similar to the behaviour described in this question - it only shows a blank page)

For about 60 seconds nothing happens, until the following exception raised:

Traceback (most recent call last):
File "selenium-test.py", line 4, in <module>
driver = webdriver.Firefox()
File "/home/usr1/.local/lib/python2.6/site-packages/selenium/webdriver/firefox/webdriver.py", line 61, in __init__
File "/home/usr1/.local/lib/python2.6/site-packages/selenium/webdriver/remote/webdriver.py", line 72, in __init__
self.start_session(desired_capabilities, browser_profile)
File "/home/usr1/.local/lib/python2.6/site-packages/selenium/webdriver/remote/webdriver.py", line 114, in start_session
'desiredCapabilities': desired_capabilities,
File "/home/usr1/.local/lib/python2.6/site-packages/selenium/webdriver/remote/webdriver.py", line 165, in execute
File "/home/usr1/.local/lib/python2.6/site-packages/selenium/webdriver/remote/errorhandler.py", line 136, in check_response
raise exception_class(value)
selenium.common.exceptions.WebDriverException: Message: u'<HTML><HEAD>\r\n<TITLE>Network Error</TITLE>\r\n</HEAD>\r\n<BODY>\r\n<FONT face="Helvetica">\r\n<big><strong></strong></big><BR>\r\n</FONT>\r\n<blockquote>\r\n<TABLE border=0 cellPadding=1 width="80%">\r\n<TR><TD>\r\n<FONT face="Helvetica">\r\n<big>Network Error (tcp_error)</big>\r\n<BR>\r\n<BR>\r\n</FONT>\r\n</TD></TR>\r\n<TR><TD>\r\n<FONT face="Helvetica">\r\nA communication error occurred: "Operation timed out"\r\n</FONT>\r\n</TD></TR>\r\n<TR><TD>\r\n<FONT face="Helvetica">\r\nThe Web Server may be down, too busy, or experiencing other problems preventing it from responding to requests. You may wish to try again at a later time.\r\n</FONT>\r\n</TD></TR>\r\n<TR><TD>\r\n<FONT face="Helvetica" SIZE=2>\r\n<BR>\r\nFor assistance, contact your network support team.\r\n</FONT>\r\n</TD></TR>\r\n</TABLE>\r\n</blockquote>\r\n</FONT>\r\n</BODY></HTML>'

These are the software versions

  • Firefox ESR 17.0.5

  • Selenium (Python bindings) 2.35.0

  • Python 2.6.6

  • Red Had Linux 6.3

  • the "Firefox WebDriver 2.35.0" browser extension is installed

Answer Source

Ok, after searching around for a while I noticed that usually the problem was a bug in Selenium (possible, but rather unlikely), or a proxy issue. Still, none of the answers suggesting how to solve the proxy issue seemed to work.

Finally I got it: you need to unset all proxy settings everywhere (environment variables, and - in my case this was the issue- on Gnome). Later when you create the webdriver, you need to pass a profile which sets the browser proxy settings to what you actually use (in my case an automatic config url)

1) Unset the http_proxy environment variable (which is used by urllib)

export http_proxy=

2) Cleared Gnome proxy settings: System --> Preferences --> Network Proxy --> Select "Direct Internet Connection"

3) Started webdriver.Firefox() with a profile which configures the proxy (in this case it's an automatic proxy configuration)

fp = webdriver.FirefoxProfile()
# Here "2" stands for "Automatic Proxy Configuration"
fp.set_preference("network.proxy.type", 2)
driver = webdriver.Firefox(firefox_profile=fp)
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