Why doesn't the cookie die after closing the browser?

Question

PHP

Good afternoon!
PHP 5.6.30, XAMPP build
php.ini setting session.cookie_lifetime=0
Start session. The browser creates a cookie with the PHPSESSID. In the browser settings, I see that the Expires parameter of this cookie is equal to "At end of session".
I close the browser, comment on the start of the session in the script, open the browser - the cookie is alive.
I create a test cookie manually without specifying the destruction time, in the browser settings I see that the Expires parameter of this cookie is equal to "At end of session". I close the browser, comment on the setting of the cookie, open the browser - this cookie is also alive.
Tested in Chrome and Firefox. Both browsers have the same behavior.
What's wrong? Why don't they die after browser restart?

Answer 1

Does the browser remember which tabs were open, and then restore it? If so, then probably restores the session. Resolved by browser settings.

Answer 2

overwrite