title: How to start Firefox with with specific profile Selenium Python geckodriver
body: <p>Here is my code:</p>
  
  <pre><code>profile = webdriver.FirefoxProfile('C:\\Users\\Administrator\\AppData\\Roaming\\Mozilla\\Firefox\\Profiles\\kvycjolb.Prdel')
  driver = webdriver.Firefox(profile)
  </code></pre>
  
  <p>Im not getting any error and firefox starts, but it just does not load with this profile: I have tried changing / to // etc.. but no luck.</p>
  
  <p>This also does not work:</p>
  
  <pre><code>from selenium import webdriver
  from selenium.webdriver.firefox.firefox_profile import FirefoxProfile
  from selenium.webdriver.firefox.firefox_binary import FirefoxBinary
  binary = FirefoxBinary("C:\\Program Files\\Mozilla Firefox\\firefox.exe")
  profile = FirefoxProfile("C:\\Users\\Administrator\\AppData\\Roaming\\Mozilla\\Firefox\\Profiles\\kvycjolb.Prdel")
  driver = webdriver.Firefox(firefox_profile=profile, firefox_binary=binary, executable_path="C:\\aprog\\geckodriver.exe")
  driver.get('https://google.com')
  </code></pre>
  
  <p>Im getting error:</p>
  
  <pre><code>C:\aprog&gt;testff
  Traceback (most recent call last):
    File "C:\aprog\testff.py", line 7, in &lt;module&gt;
      driver = webdriver.Firefox(firefox_profile=profile, firefox_binary=binary, e
  xecutable_path="C:\\aprog\\geckodriver.exe")
    File "C:\Python27\lib\site-packages\selenium\webdriver\firefox\webdriver.py",
  line 152, in __init__
      keep_alive=True)
    File "C:\Python27\lib\site-packages\selenium\webdriver\remote\webdriver.py", l
  ine 98, in __init__
      self.start_session(desired_capabilities, browser_profile)
    File "C:\Python27\lib\site-packages\selenium\webdriver\remote\webdriver.py", l
  ine 188, in start_session
      response = self.execute(Command.NEW_SESSION, parameters)
    File "C:\Python27\lib\site-packages\selenium\webdriver\remote\webdriver.py", l
  ine 256, in execute
      self.error_handler.check_response(response)
    File "C:\Python27\lib\site-packages\selenium\webdriver\remote\errorhandler.py"
  , line 194, in check_response
      raise exception_class(message, screen, stacktrace)
  selenium.common.exceptions.WebDriverException: Message: Unable to find a matchin
  g set of capabilities
  </code></pre>