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Firefox opens minimized to the task bar and won't actually open in a window or fullscreen

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  • 1 has this problem
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  • Last reply by FredMcD

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I've had Firefox installed and working in W-10 for a long time, yesterday it suddenly got minimized to the task bar and nothing I tried would open it. I had to use Chrome to search for advice, and it turns out that other users had the same problem. I tried the suggestions (alt-spacebar-move) etc. but nothing worked. I had to got to "Uninstall" and the opted for the "Refresh" function to restore Firefox to a functional Browser. It's now working again, but what caused it? and is it likely to happen again? Thanks for your attention  :)

I've had Firefox installed and working in W-10 for a long time, yesterday it suddenly got minimized to the task bar and nothing I tried would open it. I had to use Chrome to search for advice, and it turns out that other users had the same problem. I tried the suggestions (alt-spacebar-move) etc. but nothing worked. I had to got to "Uninstall" and the opted for the "Refresh" function to restore Firefox to a functional Browser. It's now working again, but what caused it? and is it likely to happen again? Thanks for your attention :)

Chosen solution

The window may have opened outside the viewing window.

https://support.mozilla.org/en-US/kb/changes-toolbars-and-window-sizes-are-not-saved You may have corrupt xulstore.json file.

Close Firefox. Open your file browser to this hidden location:

  • Mac: *~/Library/Application Support/Firefox/Profiles
  • Linux: *~/.mozilla/firefox/Profiles
  • Windows: %AppData%\Mozilla\Firefox\Profiles
  • *C:\Users\<user>\AppData\Roaming\Mozilla\Firefox\Profiles
  • Windows XP: C:\Documents and Settings\<user>\Application Data \Mozilla\Firefox\Profiles\

Search for the above file. Then rename or delete it. Restart Firefox.

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Chosen Solution

The window may have opened outside the viewing window.

https://support.mozilla.org/en-US/kb/changes-toolbars-and-window-sizes-are-not-saved You may have corrupt xulstore.json file.

Close Firefox. Open your file browser to this hidden location:

  • Mac: *~/Library/Application Support/Firefox/Profiles
  • Linux: *~/.mozilla/firefox/Profiles
  • Windows: %AppData%\Mozilla\Firefox\Profiles
  • *C:\Users\<user>\AppData\Roaming\Mozilla\Firefox\Profiles
  • Windows XP: C:\Documents and Settings\<user>\Application Data \Mozilla\Firefox\Profiles\

Search for the above file. Then rename or delete it. Restart Firefox.