Examine source code of PlusGood

{
  "theme": {
    "images": {
      "theme_frame": "header2-1-1.jpg"
    },
    "colors": {
      "frame": "#6fc468",
      "tab_background_text": "#fdffc4"
    }
  },
  "version": "2.0",
  "name": "PlusGood",
  "manifest_version": 2,
  "description": "The newest edition from the Party..."
}