In Firefox, you can use Firebug , among others , to check whether cookies are sent back and forth. Check the Network panel for complete request and response headers. Cookies are present as the response header Set-Cookiewhenever the session starts, and as the Cookierequest header for all subsequent requests in the same session.
Here is a screenshot of the transferred headers when requesting this topic:

(note that I deleted the cookie value userfrom the screenshot, otherwise someone will be able to copy it and log in as myself )
- , , cookie. cookie. , - .