I'm having the same issue with MBAM showing a pop up window that it is blocking the domain of 41.teracreatives.com. I found one site on how to remove from Mozilla Firefox and other browsers. The specific directions for Firefox were to do a"refresh" which I did yesterday and found today that that did not take care of the issue. I am now contemplating doing a complete uninstall and reinstall of Firefox, as I saw that recommended for Google Chrome. Will post back after doing this, going to research a little more to see if I need to do anything other than backup my FF bookmarks.