Under Options-Privacy-Show Cookies I have a long list of entries. Remove Cookies or Remove All does not clear any cookie. Under Firefox profiles, I renamed the cookies.sqlite file and restarted Firefox. New cookies.sqlite file was created and the file size was reduced. Cookie content appears to be removed (i.e. site settings/logon info removed) but repeating the Options/Privacy/Show Cookies step still displays the older cookie names. I have tried all the different settings of clearing upon exit, clear recent history , etc but the result is the same.

The cookie name can not be deleted. Selecting a cookie and trying to Remove Cookie just causes the highlighted selection to move to the next cookie entry. Haven't used a sqlite manager to examine the file content so I'm unsure what is in the sqlite file.