Examine source code of doodlebug Naterbug

{
  "theme": {
    "images": {
      "theme_frame": "doodlebug.png"
    },
    "colors": {
      "frame": "#ffc863",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "doodlebug Naterbug",
  "manifest_version": 2,
  "description": "My little brother is to young to color, but will be drawing (or scribbling) soon!"
}