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every time i press the volume up key a window for devtools opens up wtf?

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every time i press the volume up key i while watching videos a window for Dev Tools opens up. also firefox won't save any of my settings like blackout mode

every time i press the volume up key i while watching videos a window for Dev Tools opens up. also firefox won't save any of my settings like blackout mode

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What key is your volume up key, one of the F keys? Might be able to disable the dev tool shortcut

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F12 opens the developer tools for me.
I'm not sure how function keys work on Mac and whether they can have a dual function.