Customizing `about:config` warning
Instead, I suggest we change the message to warn, changing stuff here will probably break the privacy and security design of the browser.
And also take the opportunity for the user to tell us why they want to change a setting there, so we can learn from it.
With a message along these lines: "If you need to change a setting, please tell us so we can better evaluate your needs"; with an easy was of contacting us.