I cannot imagine why I would want to run a web browser that contains components that are only there in order to inform third parties how to better target me with advertising. That’s because I conceive of software as a tool I choose to deploy in order to serve me and my ends. Google apparently look at the purpose of software quite differently. I mean, if someone really wants their web browser to do that, then by all means, let Google provide an extension for it, and people can opt-in to use it. I would expect that the low numbers of people doing so would be very revealing.