{ "skin-theme": { "options": [ "os", "day", "night" ], "preferenceKey": "citizen-theme" }, "citizen-feature-pure-black": { "options": [ "0", "1" ], "preferenceKey": "citizen-pure-black" }, "citizen-feature-custom-font-size": { "options": [ "0", "1", "2" ], "preferenceKey": "citizen-font-size" } }