Stop firefox from exiting full screen on pressing escape

A while ago I got a new macbook, and installed firefox again. But I quickly ran into the issue where if you press escape, it closes the fullscreen. Which to me is an insane default, as I might press escape to try and close a modal for example.

Thankfully the fix is pretty easy. Just go to about:config (put it in the address bar). You might have to press an Accept the risk and continue button.

In the search bar, search for browser.fullscreen.exit_on_escape, and set it to false (press the button on the right). Now you can press escape to your hearts content, without closing the full screen.

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