How to delete all cookies at exit except "special" cookies?

[thoste]

I setup Firefox v52.2.4 so that ll cookies all wiped at exit.
Thats fine at first.

Now I want to keep some special cookies for certain websites.

How excatly can I define these cookie exceptions?

Thomas

[Brummelchen]

https://addons.mozilla.org/en-US/firefo ... ontroller/

HTH

PS reset firefox setting to delete cookies.