Caniuse: Add `navigator.doNotTrack` and DNT support tables

[ndorfin]

Please can we have DNT and doNotTrack support added to caniuse.com

The 'Do Not Track' privacy initiative is implemented first at an HTTP Header level, e.g. DNT:1 and then exposed on the window and navigator objects in the DOM as doNotTrack depending on the User Agent.

Current implementations:

• navigator.doNotTrack
• navigator.msDoNotTrack (IE 9-10)
• window.doNotTrack (IE 11+, Safari 7+)

See:

• W3.org spec (Working Draft): https://www.w3.org/TR/tracking-dnt/
• MDN Guide on the Do Not Track initiative: https://developer.mozilla.org/en-US/docs/Web/Security/Do_not_track_field_guide
• MDN Article on navigator.doNotTrack: https://developer.mozilla.org/en-US/docs/Web/API/Navigator/doNotTrack

As a web developer, I'm interested in a JS polyfill that would check the User Agent for the user's Do Not Track setting. If doNotTrack is set, then I'd, for instance, not load up any client-side analytics.

Thanks!

[cvrebert]

+1

[grinfax]

+1

[dmdabbs]

+1 And please include storeSiteSpecificTrackingException, etc. With the EU GDPR looming there's likely to be interest in this.

[donohoe]

+1 on @dmdabbs regarding _GDPR_. We're working on this now and we're not the only ones.

[Fyrd]

Now available at https://caniuse.com/#feat=do-not-track