The point you made is (simplified) "Chrome is better than Firefox for privacy". Yet you brought nothing to support this beyond "the devil you know is better". Especially since Google is heavily relying on marketing your data to the point where they gather it covertly or force users into privacy breaking situations.
Common sense would lead anyone to assume they don't collect it just to flip bits on a storage device. Just when you thought you knew the devil. Knowing this guess you'll drop Chrome now, right?
[0]-[over 9000]
So tell me about this devil you know and how exactly knowing all that still pushes you to believe it's the better option?