Privacy.donottrackheader.value
Background
The “Do Not Track” feature is a mechanism that allows to communicate a user's tracking preferences to websites. User tracking is performed by websites, including advertisers and analytics services as well as social sites, to gather information about the user's web browsing pattern. This includes the history of sites visited along with preferences stated and purchases made. Such sites often use this information to show advertisements for products or services specifically targeted based on the user's profile. See External links below for further reading.
Possible values and their effects
0
A header stating consent to being tracked is sent to all websites if privacy.donottrackheader.enabled is set True.
1
A header stating the request not to be tracked is sent to all websites if privacy.donottrackheader.enabled is set True. (Default)
Caveats
- This preference does not have any effect if privacy.donottrackheader.enabled is False.
- Websites are not obligated to honor the request.
UI
Mozilla Firefox
This setting is located in Tools → Options → Privacy:
- The value is 1 when “Tell sites that I do not want to be tracked” is selected.
- The value is 0 when “Tell sites that I want to be tracked” is selected.
- It can be either when “Do not tell sites anything about my tracking preferences” is selected.
SeaMonkey
This setting is located in the Edit → Preferences → Privacy & Security main tab:
- The value is 1 when “I do not want to be tracked” is selected.
- The value is 0 when “I consent to being tracked” is selected.
First checked in
Has an effect in
- Mozilla Firefox (nightly builds since 2013-01-29; 21.0a1 and later)
- SeaMonkey (nightly builds since 2013-01-29; 2.18a1 and later)
Related bugs
- Bug 628197 - Implement do-not-track HTTP header
- Bug 765398 - Implement three-state UI for DNT (do not track me, okay to track me, decline to state)
- Bug 835134 - Modify Privacy & Security Preferences UI to reflect recent backend additions
