Session join after browser restart?

[skeltern]

The $session feature is easy to use and great to store inputs like currency or cart items temporary on server side. Identified by client cookie ID. I thought the session lifetime works persistent. But the wire cookie is only valid until the browser will be closed. Next visit starts always with a fresh session. All vars got lost. Session file is still on server, but access impossible without cookie ID. Is there anyone way to change the client session cookie lifetime from "expired if browser closed" to maybe "current time plus 48h"?

I could create a second beside the "wire" cookie to store things at client side. But all data will saved in client browser directly. The concept to identify via cookie but data always on server is better and more secure. And one cookie is better as two.

Which alternative way would you prefer to store some vars for "guest" role users more persistent?