NoScript does this kind of stuff, I discovered it when preserving my prefs.js to be used in a portable system. (portable in the sense of portable apps, like Portable Firefox, not in the sense the French would define it )
e. g.
Code: Select all
user_pref("capability.policy.maonoscript.javascript.enabled", "allAccess"
What did this programmer set so that the pref does not show up in about:config?