About:config indication of graphical UI available from user settings

[SugarPlacebo]

Considering changing the about:config in Firefox can break the front end interface sometimes there should be a text label or highlighting of the strings and boolean etc that have a control in user settings as a reminder of this. 

[Jon]

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[SugarPlacebo]

To clarify a bit on my phrasing I mean in the abouf:config you need an indicator of what has a UI in settings so it can be changed from there if available to avoid the UI and about:config disconnect when doing development and testing.