Thought cookie cleaner wasn't working, then went through the options and changed the time option from 7 days (default) to 0 (all) and it does exactly what I want (cleans all cookies).

Work very well (Firefox 58.0.2) on Mac book Pro
Fonctionne tres bien

Очень просто удалить cookies одной кнопкой! Не хватает лишь списка cookies которые не нужно удалять.

i like this add on than ecleaner, more simple and faster to delete cookies. thanks