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Firefox Instantly Closing

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  • Last reply by zeroknight

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Whenever I try to launch Firefox, a blank window opens and immediately closes instead of the actual browser. This happens no matter how many times I try, even if I restart my computer. In case it's relevant, I'm using Windows 10.

Whenever I try to launch Firefox, a blank window opens and immediately closes instead of the actual browser. This happens no matter how many times I try, even if I restart my computer. In case it's relevant, I'm using Windows 10.

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We're sorry to hear that your Firefox seems to be crashing when you open it. Please perform the following steps to give us a crash report ID that helps us find out more about the cause of the crash.

  1. On the keyboard, press [Windows] The image "Windows key" does not exist. + [R]. This should bring up a Run window that contains a text field.
  2. In that text field, type %APPDATA% and press Enter. An explorer window should open.
  3. From that explorer window, double-click on the Mozilla folder, then double-click on Firefox and then on Crash reports. Double-click on submitted.
  4. Now, you should see a list of files that contain reports. Go to View > Arrange Icons by > Modified to get the most recent files at the top of the window.
  5. Open the most recent 5 files with a text editor and copy the IDs.
  6. Paste each ID with bp- into the reply window on the forums.

Thanks in advance!

You can find more information and troubleshooting steps in the Troubleshoot Firefox crashes (closing or quitting unexpectedly) article.

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Does it still happen if you rename firefox.exe to something else?