Q:

userid_expires nginx

I need to define a cookie on with nginx according to this doc : http://wiki.nginx.org/HttpUseridModule
But when I set :
userid          on;
userid_name     SessionStatId;
userid_domain   orange.fr;
userid_path     /;
userid_expires  8y;

Expire is set to session and not ten years as defined! 
Do you know why and how can I work around this? 

A:

I found it ! 
In my Firefox configuration, I've ajust it to clean all cookies by firefox closure. 
So all cookies were setted to expire at the end of session.  It was that !