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Firefox will not re-start without "ending process" with Windows Vista Task Manager.

  • 1 reply
  • 13 have this problem
  • 6 views
  • Last reply by user633449

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Error Message: “Firefox is already running, but is not responding. To open a new window, you must first close the existing Firefox process, or restart your system.”

Have to start Task Manager and then end firefox.exe process.

Thanks all.

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The Reset Firefox feature can fix many issues by restoring Firefox to its factory default state while saving your essential information. Note: This will cause you to lose any Extensions, Open websites, and some Preferences.

To Reset Firefox do the following:

  1. Go to Firefox > Help > Troubleshooting Information.
  2. Click the "Reset Firefox" button.
  3. Firefox will close and reset. After Firefox is done, it will show a window with the information that is imported. Click Finish.
  4. Firefox will open with all factory defaults applied.


Further information can be found in the Refresh Firefox - reset add-ons and settings article.

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