Examine source code of Nederland Kiest

{
  "theme": {
    "images": {
      "theme_frame": "ff-elections.jpg"
    },
    "colors": {
      "frame": "#999999",
      "tab_background_text": "#333333"
    }
  },
  "version": "2.0",
  "name": "Nederland Kiest",
  "manifest_version": 2,
  "description": "This is a Firefox persona that has an election theme. A red pencil and a nice, calm white/gray gradient."
}