Tenacious Cookies in IE

I'm not sure. A reason I can think of is that the cookies are named IE cookies but are actually being plant when you use any other browser. Anyway, I wouldn't worry much about it. I'm using Firefox too, but still get some IE cookies cleaned from time to time on maintenance.

This is not related directly to IE. What happens is that IE itself uses an API (application programming interface) which sets the cookies.

A lot of other applications can use that API including Outlook, and almost any other application on Windows that accesses the internet.

Firefox specifically doesn't use it (at least as far as I know) and keeps the cookies in a different place.

The tracking cookies can come from Emails that contains images or HTML pages that you receive and view using Outlook. 

That's why even though you don't use IE directly you might end up with tracking cookies on your computer.

The thing is that they will only be used again if you use the same software that access the internet using the API that IE uses or if you use IE again so, in a sense, they really have no meaning (or at least little meaning). 

Here the cookies which you got is relevant with API ( Application programming interface)  which is  a feature utilized by Internet Explorer.

Though Firefox don’t have API uses but, your system get these cookies from Outlook and other application which are  based on API and  I think you might be using these kind of application.

For more information visit: http://windows7.iyogi.net