Do you have an extension like TACO (Abine) that maintains a set of OPT-OUT cookies?

• Targeted Advertising Cookie Opt-Out (TACO): https://addons.mozilla.org/firefox/addon/11073

TACO with Abine prevents over 100 different online advertising networks (including Google, Microsoft and Yahoo) from displaying highly targeted advertisements using the detailed information on your web surfing habits. TACO disables most behavioral advertising by setting 100+ permanent, generic, non personally identifiable "opt-out" cookies directly into the browser.

Unlike other opt-out solutions, this tool will make the opt out cookies completely persistent. That is, clearing the browser's cookies will delete all other installed cookies, except these.

Got that. I do have Taco and guess that kept setting the cookies. Also, disabled all FF addons and it started working fine. Shut it off and restart FF and it works just great. Kind of weird though. Many thanks to all of you. C.