I think there's an easy solution to this: when one first launches Firefox (or another browser), it can prompt the user. Firefox already has a "know your rights" thing that comes up. Internet Explorer asks what search engine and other stuff you want to use. Having a "Do Not Track" option as part of that would be reasonable.<p>As for Mozilla and this letter, Do Not Track isn't legislated. Basically, it's a way for you to tell websites that you don't want to be tracked, but they have no obligation to follow your wishes. Some advertisers [citation needed] have indicated that they will follow Do Not Track if it's an opt-in system. A cursory search shows that Yahoo ignores the setting from IE10 because Microsoft made it a default (<a href="http://www.theregister.co.uk/2012/10/26/yahoo_to_ignore_ie10_do_not_track/" rel="nofollow">http://www.theregister.co.uk/2012/10/26/yahoo_to_ignore_ie10...</a>). As the article notes, the W3C says that Do Not Track should be opt-in.<p>So, on the one hand, advertisers seem to be saying "if Do Not Track is a default setting, it isn't a user choice and we'll ignore it." If Mozilla makes it a default, it doesn't help anyone. However, I think browser makers could call their bluff by making it a very apparent option when starting the web browser.<p>I think Do Not Track should be the norm. However, it isn't. The norm <i>is</i> tracking. Once a norm has been established, it's hard to replace it with a new norm. Cigarettes would never get approved for sale if they were invented/discovered today. If subways were a new invention, it seems like they would be built with walls preventing people from being pushed onto the tracks. But norms were established and it's hard to move away from them.<p>In this case, I think there's an easy solution: explicitly asking on first launch. Browsers already ask to be the default, some try to tell you about rights, some ask you about search engines, etc. Just add Do Not Track to that process. Then we explicitly have a user opinion on the matter.