In 2020, a coalition of US-based internet companies announced the Global Privacy Control header that spiritually succeeds Do Not Track header. As of March 2023, Mozilla Firefox continues to support DNT, where it is turned on by default in private browsing mode and optional in regular mode. Apple discontinued support for DNT the following month, citing browser fingerprinting concerns. The W3C disbanded its DNT working group in January 2019, citing insufficient support and adoption. Thus, critics purport that it is not guaranteed enabling DNT will actually have any effect at all. ĭNT is not widely adopted by the industry, with companies citing the lack of legal mandates for its use, (see Do Not Track legislation) as well as unclear standards and guidelines for how websites are to interpret the header. Efforts to standardize Do Not Track by the W3C in the Tracking Preference Expression (DNT) Working Group reached only the Candidate Recommendation stage and ended in September 2018 due to insufficient deployment and support. Mozilla Firefox became the first browser to implement the feature, while Internet Explorer, Apple's Safari, Opera and Google Chrome all later added support. The Do Not Track header was originally proposed in 2009 by researchers Christopher Soghoian, Sid Stamm, and Dan Kaminsky. Do Not Track ( DNT) is a formerly official HTTP header field, designed to allow internet users to opt-out of tracking by websites-which includes the collection of data regarding a user's activity across multiple distinct contexts, and the retention, use, or sharing of data derived from that activity outside the context in which it occurred.
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