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Firefox 108.0.2 (64-bit) now won't open full screen.

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Firefox has inexplicably begun opening in a narrow screen by defalt. I want to set it to opening full screen by default. It's a pain to have to click twice or press F11 for full screen use. How please?

Firefox has inexplicably begun opening in a narrow screen by defalt. I want to set it to opening full screen by default. It's a pain to have to click twice or press F11 for full screen use. How please?

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Toggle Full Screen keyboard shortcut: Press the F11 key. Note: On computers with a compact keyboard (such as netbooks and laptops), press the fn + F11 keys.

Regards, Will