Firefox closes spontaneously when I haven't touched the pc for a while, usually at night.

As above. When I restart Firefox it always opens in the same position on the screen and the same window size even if it wasn't the last position/size when I left it.
This isn't an accident, it disappears.

The reset Firefox feature can solve a lot of problems in restaurant Firefox to its factory default condition while saving your vital information.
Note: This will make you lose all the Extensions, open Web sites and preferences.

To reset Firefox, perform the following steps:

  1. Go to Firefox > help > troubleshooting information.
  2. Click on the button 'Reset Firefox'.
  3. Firefox will close and reset. After Firefox is finished, it will display a window with the imported information. Click Finish.
  4. Firefox opens with all the default settings applied.

Information can be found in the article Firefox Refresh - reset the settings and Add-ons .

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Tags: Firefox

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