You probably don't want to run Firefox Nightly any more
It seems people simply want to be outraged at Mozilla. The shield study isn't even running yet and several people have raised concerns over the opt-out policy in the mailing list and bugtracker but obviously that doesn't matter.What matters is that the original suggestion was opt-out.Of course, rightfully, nobody is going to send a message on the bugtracker or mailing list or otherwise participating to ensure this doesn't happen.Rather, everyone goes out and yells how terrible Mozilla is and how Google is being nice since they atleast tell you about it upfront. (Completely ignoring that Google is steering Chrome into a new IE-Era of web development)I don't think the blog post above accurately represents the current situation on the shield study nor does it reflect how several people engaged on it are trying to prevent this exact kind of PR disaster.