Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Can't set Firefox (29.0.1) to "Do not want to be tracked". It always reverts to "Do not tell sites anything about mu trackinf preferences".

  • 3
  • 3
  • 10 views
  • Nzaghachi ikpeazụ nke cor-el

more options

The "Do Not Track" setting does not work in Firefox 29.0.1. It always reverts to "Do not tell sites anything about mu trackinf preferences".

The "Do Not Track" setting does not work in Firefox 29.0.1. It always reverts to "Do not tell sites anything about mu trackinf preferences".

Asịsa ahọpụtara

How do these prefs show on the about:config page?

Did you try to delete the prefs.js file and possible user.js file to reset all prefs?

Did you check for issues caused by extensions?

Can't you change this setting at all or does it only revert when you close close and restart Firefox or when you reboot the computer?

Gụọ azịza a na nghọta 👍 0

All Replies (3)

more options

Do-not-track is now a three state setting and is controlled by two prefs: one to enable/disable the DNT header and another to determine its value.

  • privacy.donottrackheader.enabled (false)
  • privacy.donottrackheader.value (1)

Your System Details list shows that you have a user.js file in the profile folder to initialize prefs each time Firefox starts.

The user.js file is only present if you or other software has created this file and normally it wouldn't be there. You can check its content with a plain text editor (right-click: Open with) if you didn't create this file yourself.

The user.js file is read each time Firefox is started and initializes preferences to the value specified in this file, so preferences set via user.js can only be changed temporarily for the current session.

You can use this button to go to the currently used Firefox profile folder:

  • Help > Troubleshooting Information > Profile Directory: Show Folder (Linux: Open Directory; Mac: Show in Finder)
more options

Didn't work, even with multiple tries. Fix Firefox...

more options

Asịsa Ahọpụtara

How do these prefs show on the about:config page?

Did you try to delete the prefs.js file and possible user.js file to reset all prefs?

Did you check for issues caused by extensions?

Can't you change this setting at all or does it only revert when you close close and restart Firefox or when you reboot the computer?