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open firefox in full screen by default

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I have tried many suggestions to get firefox to open in full screen by default...F11, properties- maximised etc etc but it still starts in small screen. Anything else please???

I have tried many suggestions to get firefox to open in full screen by default...F11, properties- maximised etc etc but it still starts in small screen. Anything else please???

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Hello Granddad Seaside,

Maybe you'd like to give this extension a try :

https://addons.mozilla.org/en-US/firefox/addon/autofullscreen/

Note this warning :

" This is not a Recommended Extension. Make sure you trust it before installing. "

See this artricle for more information.