Examine source code of Ikarishipping

{
  "theme": {
    "images": {
      "theme_frame": "ikarishipping.jpg"
    },
    "colors": {
      "frame": "#643dbf",
      "tab_background_text": "#643dbf"
    }
  },
  "version": "2.0",
  "name": "Ikarishipping",
  "manifest_version": 2,
  "description": "For all Ikari-Fans!"
}