portability and "sensitive" files

[Admini]

as for this, I understand that many sites are so poorly/badly writen that,
even though you have set them to remember your login,
they forget it each time 

I'm testing

Code:

network.cookie.lifetime

relevent settings in firefox,
let's see if they work,
they promise to setup a cookie to expire in days defined by a user

Maybe their Cookies were expired.
You want all Cookies be persistent?
This may have huge security risk.