title: Using cookies to make browser-window changes unnoticeable
body: <p>Is it possible to save user identifying data in a cookie, so if the user changes browsers on a login-required page, then you could pick up the user identifying information and use it to make the transition unnoticeable, rather than having to prompt the user to log in again? </p>
  
  <p>I have noticed a lot of sites develop this way, I would like to avoid this on my projects, if at all possible.</p>
  
  <p><strong>Edit</strong></p>
  
  <p>What I mean by 'changing browsers' is from chrome to firefox, or firefox to ie.</p>
  
  <p>I appreciate any advice. </p>
  
  <p>Thanks in advance!</p>