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all firefox screens minimize and I cannot open, how can I fix it

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My grandson was playing a game online disney.com; he was using the wireless mouse when everything disappeared from screen and was found minimized on the bottom start line behing the mozilla icon. Now I cannont get firefox, mozilla to open full screen, even the start up page. I can close a minimized page. This is my favorite search engine,please help!

My grandson was playing a game online disney.com; he was using the wireless mouse when everything disappeared from screen and was found minimized on the bottom start line behing the mozilla icon. Now I cannont get firefox, mozilla to open full screen, even the start up page. I can close a minimized page. This is my favorite search engine,please help!

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Open the system menu via Alt+Space and see if you can resize that window.
If that works then close Firefox to save that setting.

See also:


Window sizes and positions are stored in localstore.rdf in the Profile Folder.

See: