Hi This does not sound like an issue with Firefox itself, but an add-on that you have installed. Add-ons are created by a large community of independent developers. The developer for the add-on that you are using is the best person to contact for help and support with their software. You can find their contact details by clicking on their name on the page that you downloaded the [https://addons.mozilla.org/en-GB/firefox/addon/cookiekeeper/?src=search add-on] from.