You know I wouldnt want to argue Lusker,but ...i have found that yes these come from here.
they are added with every page I look at.(here)
I delete them but they come back when I open a new page.
I have seen hitbox before,but I cant remember where.Maybe an auto parts site.
I set my privacy to block third party cookies. I will let you know if it worked. Last time i tried something it kept me out of the pro side and I thought for sure you had banned me for being stupid.