Need confirmation before cleaning. The risk of data loss can not be justified by "security". I mean confirmation by pressing the "clear" button, after accidentally clicking on it instead of clicking on the arrow selection.
Startup cleanup happens when the extension reloads. So updates to the extension = reloading the extension. Thus triggering a cleanup on update that deletes greylisted cookies and various other unused cookies. Also, enabling "Clean Cookies from Open Tabs on Startup" will clean a lot more than you expect. In the future, I will see if this can be fixed.
