When you delete cookies there is something to consider, most companies that store settings for bank info, radio station play lists, and tracking cookies are moving away from or have already moved from Browser cookies to Hidden Cookies. It does not matter anymore what browser you use, it is browser independent.
Most of the tracking stuff you want to delete is not in a traditional cookie and if it is 99% of the time it is duplicated in a hidden folder and that folder is also duplicated and hidden.
Advertisers use a tool that will copy your cookies (of that advertisers) into these hidden files.
I could not understand at first how after I deleted cookies they still knew my profile. I tried a program called qusum to scan my computer and found about 400 and some of these things. And yes it will allow you to enter in cookies not to delete.
I don't know if they allow links on this thread but the url is qusum (dot) com