And that Mozilla refuses to merge many of Mike Perry's privacy and security-enhancing patches for Tor Browser Bundle because they make advertisers' lives more difficult.
I could trivially list at least a dozen default Firefox preferences that could readily be explained by conflicts of interest, rather than common sense or Mozilla's commitment to user privacy or their increasingly-touted (and I'm guessing, unpublished) user studies.
It would be interesting to study which Firefox 'features' get prioritized or broken or fixed via paid staff time on a given time horizon and plot that against deals Mozilla makes with 3rd parties.