How to make so that the users of the site "A" imperceptibly for them installed cookies from the site "B"?
On sites that do not prohibit to show themselves in an iframe, this is solved by loading the page of the site "B" into an invisible frame. Cookies arrive with the page.
But there are sites that prohibit showing themselves in frames and redirect their beloved ones to themselves.
Tell me, please, what and how to do in such cases? :)