Examine source code of Flying Balloons

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#5a6aa6",
      "tab_background_text": "#ffd27d"
    }
  },
  "version": "2.0",
  "name": "Flying Balloons",
  "manifest_version": 2,
  "description": "Self painted computer image (see my website)"
}