>>> from selenium import webdriver
>>> browsesr = webdriver.Firefox()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python2.7/dist-packages/selenium/webdriver/firefox/webdriver.py", line 59, in __init__
    self.binary, timeout),
  File "/usr/lib/python2.7/dist-packages/selenium/webdriver/firefox/extension_connection.py", line 47, in __init__
    self.binary.launch_browser(self.profile)
  File "/usr/lib/python2.7/dist-packages/selenium/webdriver/firefox/firefox_binary.py", line 65, in launch_browser
    self._start_from_profile_path(self.profile.path)
  File "/usr/lib/python2.7/dist-packages/selenium/webdriver/firefox/firefox_binary.py", line 81, in _start_from_profile_path
    self._modify_link_library_path()
  File "/usr/lib/python2.7/dist-packages/selenium/webdriver/firefox/firefox_binary.py", line 177, in _modify_link_library_path
    self.profile, self.NO_FOCUS_LIBRARY_NAME, "x86", "amd64")
  File "/usr/lib/python2.7/dist-packages/selenium/webdriver/firefox/firefox_binary.py", line 194, in _extract_and_check
    library_path)
  File "/usr/lib/python2.7/shutil.py", line 119, in copy
    copyfile(src, dst)
  File "/usr/lib/python2.7/shutil.py", line 82, in copyfile
    with open(src, 'rb') as fsrc:
IOError: [Errno 2] No such file or directory: '/usr/lib/python2.7/dist-packages/selenium/webdriver/firefox/x86/x_ignore_nofocus.so'