In our organization, we enforce through group policy to clear cookies and site data each time the browser is closed. I see there's an exception list to define certain sites that it will not clear cookies or site data. Where in group policy can this exception be set. This option can be seen (allow) from the article here under Block cookies and site data for more than one website > Step 3 https://support.mozilla.org/en-US/kb/block-websites-storing-cookies-site-data-firefox Thanks,