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Firefox won't open. I've try everything that has been suggested. I have reinstalled Firefox but have the same problem. Can't locate the Profile Manager to try changing profile.

Firefox won't open. I've try everything that has been suggested. I have reinstalled Firefox but have the same problem. Can't locate the Profile Manager to try changing profile.

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John Davis wrote:

Can't locate the Profile Manager to try changing profile.
  1. Press the Windows logo orb on the taskbar to bring up the Start Menu.
  2. In the search box, type firefox.exe -p and press the Enter key.