No, PokerStars Can't See Your Screen\n\n Another thing that is mentioned in the blog, is that PokerStars are unable to see what is on your screen.

PokerStars is one of the most successful and profitable poker sites the industry has ever seen. Nobody has been able to rival their dominance for over a decade now. And no matter what you think of their new ownership, they continue to crush it in every possible way from a business point of view.