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Frequently get the Firefox is already running message but no browser/process open.

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Frequently get the Firefox is already running message but no browser/process open? What does this mean? Thanks!

Frequently get the Firefox is already running message but no browser/process open? What does this mean? Thanks!

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If you reboot the computer, do you get the same error?

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Use one of these to close Firefox if you are currently doing that by clicking the close X on the Firefox title bar.

  • "3-bar" menu button -> Exit (Power button)
  • Windows: File -> Exit
  • Mac: Firefox -> Quit Firefox
  • Linux: File -> Quit

See also: