Here's a situation where a car analogy might actually be helpful. There's the kind of setting where you have to open the hood to mess with it. Then there's the

Here's a situation where a car analogy might actually be helpful. There's the kind of setting where you have to open the hood to mess with it. Then there's the settings available to the driver on the dashboard. Make the difference between these types of settings really, really obvious and you're good. about:config is like opening the hood. Put those serious changes there. Put everything else, that does not muck with the expected, fundamental operation of the product in preferences.