Examine source code of Sunset Balloon

{
  "theme": {
    "images": {
      "theme_frame": "weatherballoon.jpg"
    },
    "colors": {
      "frame": "#c76a2c",
      "tab_background_text": "#f0653e"
    }
  },
  "version": "2.0",
  "name": "Sunset Balloon",
  "manifest_version": 2,
  "description": "Balloon in the sunset."
}