Do you use any build of firefox? Do you feel you were given the opportunity to make informed consent concerning data sharing between Google and Mozilla that is already happening?
I think the horse is out of the barn a little on the privacy issue. There's been little to no controversy about how Google and Mozilla share data and revenue for existing firefox installs in our linux distributions of choice. I doubt Canonical would have access to any more information that Mozilla is already able to get through Google. All this really does is potentially give data and revenue to Canonical that would have otherwise gone to Mozilla. Should you trust Canonical any less than Mozilla?