title: Cookie vs user settings. Fight
body: <p>I recently developed a ecommerce site and after alot of issue I think I might have finally figured it out. (see code and question here: <a href="https://stackoverflow.com/questions/37708668/cart-cookie-issue-possible-solutions">Cart Cookie Issue. Possible solutions?</a> )</p>
  
  <p>What should happen(and does most of the time)</p>
  
  <p>User checks out and pays for items. They are sent offsite temporarily as I am using the Auth.net DPM method which then sends them to my receipt page via relay response. Once on the receipt page it takes the cart_id (the cookie) and adds in the transaction ID and sets the transaction to complete.</p>
  
  <p>What happens with some people</p>
  
  <p>The sql doesn't run at all (due to its dependence on cookie for cart id) and get error that says cart_id is not set. (but cart works throughout the rest of the website to get to this point)</p>
  
  <p>After some tests I found a user that had issue and successfuly resolved it by turning their FireFox settings for history and cookies from never remember to remember. So now that I know what the issue is (or at least I pray this is it lol) what can I do to fix this? </p>