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Firefox shuts down of its own accord when I haven't touched the pc for some time, usually overnight.

  • 4 replies
  • 1 has this problem
  • 3 views
  • Last reply by Spinky1001

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As above. When I restart Firefox it always opens in the same position on the monitor and the same size window even though that wasn't the last position/size as when I left it. This is not a crash, it just disappears.

As above. When I restart Firefox it always opens in the same position on the monitor and the same size window even though that wasn't the last position/size as when I left it. This is not a crash, it just disappears.

Chosen solution

The Reset Firefox feature can fix many issues by restoring Firefox to its factory default state while saving your essential information. Note: This will cause you to lose any Extensions, Open websites, and some Preferences.

To Reset Firefox do the following:

  1. Go to Firefox > Help > Troubleshooting Information.
  2. Click the "Reset Firefox" button.
  3. Firefox will close and reset. After Firefox is done, it will show a window with the information that is imported. Click Finish.
  4. Firefox will open with all factory defaults applied.


Further information can be found in the Refresh Firefox - reset add-ons and settings article.

Did this fix your problems? Please report back to us!

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Chosen Solution

The Reset Firefox feature can fix many issues by restoring Firefox to its factory default state while saving your essential information. Note: This will cause you to lose any Extensions, Open websites, and some Preferences.

To Reset Firefox do the following:

  1. Go to Firefox > Help > Troubleshooting Information.
  2. Click the "Reset Firefox" button.
  3. Firefox will close and reset. After Firefox is done, it will show a window with the information that is imported. Click Finish.
  4. Firefox will open with all factory defaults applied.


Further information can be found in the Refresh Firefox - reset add-ons and settings article.

Did this fix your problems? Please report back to us!

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Do you have any security software scheduled to run at that time?

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Many thanks - left PC on overnight and Firefox still open so problem seems to be solved!

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No scheduled software to run overnight, just AVG running all time. Problem seems to be solved by resetting Firefox as above. Many thanks for interest!