Here's an example of what I'm seeing. After starting Firefox, I go to my mail site (Outlook) and log in. Cookie 5 then shows 11 cookies but Firefox itself shows 31 cookies. If I "Remove Firefox Unwanted Data" with Cookie 5, I still see the cookies in Firefox itself. If I then close the Outlook browser tab and then reopen it, Outlook still knows it's me and I don't have to log in again!
If however, after starting Firefox and logging into the Outlook site, I do things in the opposite order and remove all cookies from Firefox itself (not touching Cookie 5), close the Outlook browser tab and reopen it, I have to log in all over again.
So it looks to me like Cookie 5 isn't removing Firefox's cookies even though it looks like it is. Can you please explain/help? Thanks!