So I just was using my rMBP as usual and all of a sudden Safari opens a new tab with this link, "http://fqtag.com/pixel.cgi?s=i3t40e7t-08d317bc." I wouldn't click on it, but this is what it looks like: It keeps opening these tabs. Even when you close out of Safari, it reopens and displays these tabs!!! I'm scared, what's wrong???