I have been a FF fan for almost 20 years and this is the first time sucn a phenomenon has happened. Inside Manage Cookies and Data my Storage is blank nothing is showing and yet the sites I visited are listed as well as the cookies. I have cleared everything hoping to start over would resolve this. My husband has a separate profile on our desktop computer with Windows 10 We have the same setting and yet he is not experiencing this at all. At the end of a session which is usually 1.5 hours I delete the sites that are taking up storage in the MB numbers but for the last 3 days the sites are listed again as are the cookies but under storage nothing? I have attached a screenshot there is not much there because my husband deleted all data but imagine my surprise after 1.5 hours to see all the web sites i visited listed the cookies too an zero storage? I tried to troubleshoot this but could not find anything about it on the Internet. I sincerely hope you can resolve the issue. And yes I have most recent version of FF Thank you in advance. Sincerely, Jamie Dorfman