title: Selenium can't open Firefox 48.0.1
body: <p>I am starting to learn how to become a better test driven developer when creating web applications in Django. I am trying to use Selenium to open a browser, but I am getting an error.</p>
  
  <pre><code>selenium.common.exceptions.WebDriverException: Message: Can't load the profile. Profile Dir: /var/folders/xn/bvyw0fm97j1_flsyggj0xn9r0000gp/T/tmptoxt890d If you specified a log_file in the FirefoxBinary constructor, check it for details.
  </code></pre>
  
  <p>I read that by "Installing the FF extension "Disable Add-on Compatibility Checks" skips this and everything is fine." <a href="https://stackoverflow.com/questions/35868135/selenium-common-exceptions-webdriverexception-message-cant-load-the-profile">selenium.common.exceptions.WebDriverException: Message: Can&#39;t load the profile</a>. I did this, but It is still not working. I used Python2.7 and Python3.5 with Selenium version 2.53.6. </p>
  
  <p>Python file</p>
  
  <pre><code>from selenium import webdriver
  from selenium.webdriver.common.desired_capabilities import DesiredCapabilities
  import unittest
  
  caps = DesiredCapabilities.FIREFOX
  caps["marionette"] = True
  
  class NewVisitorTest(unittest.TestCase):  
  
      def setUp(self):  
          self.browser = webdriver.Firefox(capabilities=caps)
  
      def tearDown(self):  
          self.browser.quit()
  
      def test_can_start_a_list_and_retrieve_it_later(self):  
          self.browser.get('http://localhost:8000')
  
          self.assertIn('To-Do', self.browser.title)  
  
  if __name__ == '__main__':  
      unittest.main(warnings='ignore') 
  </code></pre>
  
  <p>Stack Trace</p>
  
  <pre><code>Creating test database for alias 'default'...
  EException ignored in: &lt;bound method Service.__del__ of &lt;selenium.webdriver.firefox.service.Service object at 0x103f652b0&gt;&gt;
  Traceback (most recent call last):
    File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/selenium/webdriver/common/service.py", line 151, in __del__
      self.stop()
    File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/selenium/webdriver/common/service.py", line 123, in stop
      if self.process is None:
  AttributeError: 'Service' object has no attribute 'process'
  
  ======================================================================
  ERROR: test_can_start_a_list_and_retrieve_it_later (functional_tests.NewVisitorTest)
  ----------------------------------------------------------------------
  Traceback (most recent call last):
    File "/Users/timothybaney/Treehouse/TDD/superlists/functional_tests.py", line 13, in setUp
      self.browser = webdriver.Firefox(capabilities=caps)
    File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/selenium/webdriver/firefox/webdriver.py", line 82, in __init__
      self.service.start()
    File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/selenium/webdriver/common/service.py", line 62, in start
      stdout=self.log_file, stderr=self.log_file)
    File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/subprocess.py", line 947, in __init__
      restore_signals, start_new_session)
    File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/subprocess.py", line 1551, in _execute_child
      raise child_exception_type(errno_num, err_msg)
  NotADirectoryError: [Errno 20] Not a directory
  
  ----------------------------------------------------------------------
  Ran 1 test in 0.012s
  
  FAILED (errors=1)
  Destroying test database for alias 'default'...
  </code></pre>