The problem is that Google stands on both sides of this relationship. With Firefox there are borders around where your browser ends and the sites you visit begi

The problem is that Google stands on both sides of this relationship. With Firefox there are borders around where your browser ends and the sites you visit begin. Google has been blurring that line between browser and content ever since single sign on in Chrome 69. I think it's a fair exercise to explore the relationship between Chrome and Google services just because they put themselves in this position for a reason. We deserve to know what that reason is. I don't trust Google at their word. With Firefox there's no question because Mozilla lacks the ability to leverage anything they might incidentally collect in private browsing. Google does have that ability and we should know if they are abusing it. If you asked Google employees and Google fans if they thought Google was reading their Gmail for advertising they'd probably roll their eyes at you. And alas they turned out to be mistaken.