Examine source code of Costa Rica

{
  "theme": {
    "images": {
      "theme_frame": "header2.jpg"
    },
    "colors": {
      "frame": "#9c9494",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Costa Rica",
  "manifest_version": 2,
  "description": "my first try, i hope you like it !"
}