doesnt save settings when editing cookies Rated 2 out of 5 stars

I am trying to edit the expiration date from "end of session" to some date in the future so that I stay always logged in. But after FF restart all of the changes in the addon I made are gone.

Am I doing something wrong? or is it not possible stay always logged in by editing cookies?

This review is for a previous version of the add-on (1.5.1.1). 

This has nothing to do with CM+
Either it's your session manager or the website that changes it back to end of session. CM+ can't make cookies read-only.