Is Cookie 5 working in Firefox to delete things other than cookies?  I hope so!  I don't know how to tell if that's the case.  Should I keep using it?

Any chance you will be able to make Cookie 5 delete Firefox cookies (and other things if it isn't now)?

Thanks for your help.

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!

Thanks for your reply. I don't know if they are Cache cookies. They are shown in Firefox as still existing as cookies after I've deleted all cookies with Cookie 5.

Are you saying that they are just showing up in the Firefox display but have really been deleted?

I often clear Firefox cookies using Cookie 5 (new El Capitan user).  But they still show up in Firefox: Preferences - Privacy - Show Cookies.  So I am now deleting them both places.  Why do they still show up in Firefox and do I need to delete them from there as well as with Cookie 5?