This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Mozilla Support में खोजें

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

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.

  • 1 प्रत्युत्तर दें
  • 3
  • 3 views
  • के द्वारा अंतिम प्रतियुतर SafeBrowser

more options

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.

All Replies (1)

more options

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.

SafeBrowser द्वारा सम्पादित