Firefox starts automatically when I restart Windows

Revision Information
  • Revision id: 164798
  • Created:
  • Creator: Joni
  • Comment: new emergency article for last week's urgent release
  • Reviewed: Yes
  • Reviewed:
  • Reviewed by: heyjoni
  • Is approved? Yes
  • Is current revision? No
  • Ready for localization: Yes
  • Readied for localization:
  • Readied for localization by: heyjoni
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Revision Content
This article applies to Windows only.

If you leave Firefox open when Windows shuts down, Firefox automatically re-opens with your previously opened tabs the next time you start Windows. You can turn this off by following these steps.

Prevent Firefox from starting automatically

  1. In the address bar, enter about:config.
  2. The "This might void your warranty!" warning page will appear. Click I accept the risk! to continue to the about:config page.
  3. Search for toolkit.winRegisterApplicationRestart and double-click on it to set its value to false.
  4. No need to restart Firefox, the changes take effect immediately.