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Wizard tell me to shut down Firefox before set up

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I download the software, then it takes me to the Mozilla Firefox set up wizard. the wizard tell me that Firefox must be closed to proceed with the application. It tells me close firefox to continue? How can that be possible. Once I close firefox, everything is gone HELP

I download the software, then it takes me to the Mozilla Firefox set up wizard. the wizard tell me that Firefox must be closed to proceed with the application. It tells me close firefox to continue? How can that be possible. Once I close firefox, everything is gone HELP

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Firefox may be "hanging at exit".

  1. Stop the Firefox process:
  2. Why Firefox may hang:
  3. Use Firefox Safe Mode to find a problem with an Extension or Plugin:


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