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Every time i try to re-open firefox, it says i have an existing firefox still running that isn't responding and i need to close that or restart my system.

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  • Dernière réponse par SafeBrowser

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I close down Firefox and try to re-open it. When i do, i get this....

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.

I close down Firefox and try to re-open it. When i do, i get this.... 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.

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Sounds like Firefox is "hanging at exit". That problem is frequently caused by an Extension or a Plugin. Read all of the following articles.

NOTE: Establish a habit of exiting/closing Firefox with Firefox button > Exit or File > Exit to allow an orderly shutdown of Firefox and closing of all of the files that Firefox has open.


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


If this reply solves your problem, please click "Solved It" next to this reply when signed-in to the forum.

Modifié le par SafeBrowser