Users of Apple's mobile devices will have to wait a little longer to receive the same kind of privacy feature. However, Apple recently , to be offered in the forthcoming release of OS X. The signs are good that the feature will soon make it to the mobile version.

DNT does not turn off advertising. Mozilla hopes that websites will simply swap-in a generic ad for any that are targeted at a user's online behavior.

Do Not Track has been spreading since it was introduced with Firefox 4 and . The Associated Press has utilized it on 800 news sites, for example, while the Digital Advertising Alliance (DAA), which represents major advertising agencies, is looking at using it as part of its Self-Regulatory Program for Online Behavioral Advertising.