Data stored in a visitor cookie

date_add The date and time the cookie was created (in YYYY-MM-DD HH:MM:SS format).
id_lang The ID of the selected language.
id_currency The ID of the selected currency.
last_visited_category The ID of the last visited category of product listings.
ajax_blockcart_display Whether the cart block is "expanded" or "collapsed".
viewed The IDs of recently viewed products as a comma-separated list.
id_wishlist The ID of the current wishlist displayed in the wishlist block.
checkedTOS Whether the "Terms of service" checkbox has been ticked (1 if it has and 0 if it hasn't)
id_guest The guest ID of the visitor when not logged in.
id_connections The connection ID of the visitor's current session.
id_customer The customer ID of the visitor when logged in.
customer_lastname The last name of the customer.
customer_firstname The first name of the customer.
logged Whether the customer is logged in.
passwd The MD5 hash of the _COOKIE_KEY_ in config/ and the password the customer used to log in.
email The email address that the customer used to log in.
id_cart The ID of the current cart displayed in the cart block.
checksum The Blowfish checksum used to determine whether the cookie has been modified by a third party.
The customer will be logged out and the cookie deleted if the checksum doesn't match.