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Firefox closes by itself or unresponsive then only opens at Taskbar but not in full screen

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  • Τελευταία απάντηση από cor-el

elstaci
elstaci
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When Firefox closes by itself (crashes) or becomes unresponsive and I manually close it via Task Manager afterwards when I click on Firefox Desktop icon or Firefox taskbar icon Firefox opens but only at the Taskbar and not full Desktop screen.

See posted image.

The only fix is by deleting the Profile folder in Mozilla AppData hidden folder and replacing it with a restored copy from a System Backup file or a copy of a previous Mozilla Folder with Profiles Folder in it.

Once I replace the current Firefox Profile folder Firefox starts working normally again and starting full screen on my Windows Desktop.

This has been happening the last couple of Firefox versions and with the latest version installed.

Seems to be some sort of conflict with Windows 11 Pro or possibly a Windows security issue.

Thanks in advance

NOTE: I tried pressing Ctrl or Windows key + Arrow Keys to see if possibly it was hidden by Windows. Sometimes if I press Ctrl or Windows Key + and Arrow key the hidden app would show up. But this happens very rarely.

When''' Firefox closes by itself (crashes) '''or becomes''' unresponsive and I manually close it via Task Manager '''afterwards when I '''click on Firefox Desktop icon or Firefox taskbar icon Firefox opens''' but only at the '''Taskbar and not full Desktop screen.''' See posted image. The only fix is by '''deleting the Profile folder in Mozilla AppData hidden folder''' and replacing it with a restored '''copy from a System Backup file''' or a '''copy of a previous Mozilla Folder with Profiles Folder''' in it. Once I replace the current Firefox Profile folder Firefox starts working normally again and starting full screen on my Windows Desktop. This has been happening the last couple of Firefox versions and with the latest version installed. Seems to be some sort of conflict with Windows 11 Pro or possibly a Windows security issue. Thanks in advance NOTE: I tried pressing Ctrl or Windows key + Arrow Keys to see if possibly it was hidden by Windows. Sometimes if I press Ctrl or Windows Key + and Arrow key the hidden app would show up. But this happens very rarely.
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Τροποποιήθηκε στις από το χρήστη elstaci

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zeroknight
zeroknight
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The window could be located off-screen, try right-clicking on the window thumbnail (or hold the Shift key while right-clicking on the taskbar icon) and choose Move or Maximize. Alternatively, close Firefox and delete the xulstore.json file in your profile folder.

elstaci
elstaci Ιδιοκτήτης ερώτησης
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I have done those same troubleshooting steps without success.

But I wasn't aware about deleting xulstore.json file.

Thanks for the new Troubleshooting tip. I will try that to see if Firefox will open full screen before replacing the Profile folder.

I have bookmarked that link you gave me to make it easy to locate in the future.

I will let you know if this fixes my issue or not.

Thanks again

cor-el
cor-el
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You can also try to open the system menu via "Alt+Space" to see if you can resize the window that way.