I think many users don't understand the concept Bewertet mit 5 von 5 Sternen

Before installing 'Self-Destructing Cookies' one should do the following in order to have the add-on not remove cookies meant to be kept :

Translating from French layout ...

- Firefox Options / "Private life" / History / "Rules of preservation" : select "Use personalized settings for History"

- Under, "Accept cookies" checked, and on the right, choose "Exceptions", and in the "Exceptions" list popped up, choose the cookies/domains you wish to keep and grant them either "Allow" or "Session". "Allow" and "Session" status will prevent 'Self-Destructing Cookies' from deleting them. "Allowed" will remain after Firefox is closed, "Session" will be removed with Firefox exit.

Diese Bewertung wurde für eine vorherige Version des Add-ons (0.3.3.1-signed) abgegeben. 

New white-list button in v. 0.3.4 (sandbox) Bewertet mit 5 von 5 Sternen

The new white-list button in 'Self-Destructing Cookies' 0.3.4 works fine, but the alternative it offers is Allow (exception) or exception not set, but not exception as Session.

At this time I use, with 'Self-Destructing Cookies' 0.3.3, another add-on called 'Permit Cookies 2' ( https://addons.mozilla.org/en-US/firefox/addon/permit-cookies-2/ ) which is also an interesting white-list access.

Diese Bewertung wurde für eine vorherige Version des Add-ons (0.3.3.1-signed) abgegeben. 

For those for whome cookies' management is confusing ... Bewertet mit 5 von 5 Sternen

1- Open Firefox Options / Privacy : check "Accept cookies", uncheck or check "Third-party cookies" (better unchecked) : this will be the default setting for all cookies.

Accept cookies : if for session only, will be deleted with session unless considered as "Exception", see below
I set "for session only", this way non-exception cookies are removed on Firefox exit, otherwise they are removed by this add-on on Firefox restart if you have quit Firefox while a site was open.

2- You are on a website, you have set (above) cookies to be allowed, ok. Now you have 2 options :

2.1- Either you do nothing : when you close the site, its cookies are removed ;
2.2- You want to keep the site's cookie(s) : easy : open Firefox's 'Page Info' window, either from "Tools" menu, either from a dedicated button (there is a 'Page Info Button' add-on that does it with a click). On the 'Page Info' window, choose 'Permissions' tab -> Cookies :

Uncheck 'Default Permission' : your site is now an 'Exception' -> Now, set it as an exception either for :
Session only, Authorize (stays), block (never created - if already exists, removed with add-on)

And that's it! - This is the best procedure !

Diese Bewertung wurde für eine vorherige Version des Add-ons (0.2.2.1-signed) abgegeben. 

The best concept for cookie management Bewertet mit 5 von 5 Sternen

1- The concept : the best IMO. By reversing logic from "block all & allow selected" to "allow all and remove if not exception" I switched two previous add-ons ('CS Lite Mode' and 'selectivecookiedelete') for this 'Self-Destructing Cookies'. With advantages over previous cookie management process (no more sites requiring cookie -- even when there is no valid reason : they get the cookie the time they are active, only!)
2- It works, I mean after thinking right, it counts right (remember school?!).

Compact - Smart - Nice.

Diese Bewertung wurde für eine vorherige Version des Add-ons (0.2.2.1-signed) abgegeben.