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Often when I click into an open Firefox window, it's move to full screen

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  • Last reply by FredMcD

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Since I upgrade to Firefox Quantum 60.0.1 with OS X El Capitan, if I click on the open window it often goes immediately in Full Screen mode. Boring !

Since I upgrade to Firefox Quantum 60.0.1 with OS X El Capitan, if I click on the open window it often goes immediately in Full Screen mode. Boring !

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If you double click on the upper frame of the window = full window.