Admin CP setting not working in FireFox 14.0.1

When I tick the box beside “When the customer clicks on any Checkout button/link in the store, redirect to the Cart content page first:” in the Admin CP → Settings → General, it makes no difference for customers using FireFox 14.0.1 or FF 15. They still get redirected to the checkout page instead of the cart.



My site is using SSL. I tried clearing the admin and browser cache but it made no difference.



Works in IE9, Safari, Opera and Chrome.



Any ideas?



[color=#FF0000]UPDATE:[/color]



I figured it out. I had FF set to not send the referer header.