Rated 4 out of 5 stars

Whitelist is always full, it seems that the domains are written by itselves :(

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

SDC uses Firefox's standard cookie permissions. If you find entries in there that you don't recognize, that's usually due to one of the following:
- you put them there long before you installed SDC, as site-specific cookie permissions
- another add-on put them there

If you tried removing them and they came back, that's either because the add-on that created them in the first place restored them, or because the "permissions.sqlite" database in your profile folder is corrupted. You could try removing that file while Firefox is not running, but you will lose all whitelist entries in the process.