How do you use credentials saved by the browser in auto login script
<p>When I manually open a browser, both firefox and chrome, and proceed to a website where I previously saved my login credentials via the browser, the username and password fields automatically populate as they should. However, when I use the python selenium webdriver to open the browser to a specific page, the fields do not populate. </p>

<p>The point of my script is to open the webpage and use <code>element.submit()</code> to login since the login credentials should already be populated., but the are NOT. 
How can i get them to populate in the fields?</p>

<p>For Example:</p>

<pre><code>driver = webdriver.Chrome()    
driver.get("https://facebook.com")    
element = driver.find_element_by_id("u_0_v")    
element.submit()
</code></pre>