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Disable F6 key on firefox

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I would like to disable the keys F1 to F8.

 On the panel( industrial computer ) I have hardware keys F1 to F8. When Firefox is in full screen   
 mode I would like to disable those keys.   
  This means when you press F5 to refresh does not work, F6 does not show URL-bar, ...
  I have Firefox 18.0.1.
Thanks for your help
I would like to disable the keys F1 to F8. On the panel( industrial computer ) I have hardware keys F1 to F8. When Firefox is in full screen mode I would like to disable those keys. This means when you press F5 to refresh does not work, F6 does not show URL-bar, ... I have Firefox 18.0.1. Thanks for your help

All Replies (3)

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Note: Keyboard shortcuts can be customized using the Customizeable shortcuts extension. I have not looked deeper, but I assume you can re-assign the function keys to some do-nothing function.

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i try this but does not work, F6 key can't change because is not in Customizeable shortcuts

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F6 key can't change - apologies, I could have spared you this, if I had spent a minute checking the article I cited.

They should be reassignable on the OS level, see for instance How do I reassign hot keys for my keyboard?