title: Selenium use of Firefox profile
body: <p>I try to use Selenium Webdriver and Python on Windows 10 system to make some automation of browser actions. But I have this problem: Selenium-started Firefox window doesn't "see" that I am already logged in and target site sends me to login page. So I assumed that Selenium  not really uses the profile, but just a copy of it.</p>
  
  <p>I would like to know:</p>
  
  <ol>
  <li>Is my conclusion about actual use of copy of profile true?</li>
  <li>If 1. is true, is there a way to use really everything from existing profile?</li>
  <li>If my conclusion is not true, please prove it and point me to the direction where I can find out what information can be used for session, why Selenium could fail to send it and how to force it to do so actually. </li>
  </ol>
  
  <p>Edit:</p>
  
  <pre><code>from selenium import webdriver
  fp = webdriver.FirefoxProfile('C:/Users/&lt;user name&gt;/AppData/Roaming/Mozilla/Firefox/Profiles/abc3defghij2.ProfileName')
  driver = webdriver.Firefox(fp)
  driver.get("https://www.example.com/membersarea")
  </code></pre>