Examine source code of Muppets

{
  "theme": {
    "images": {
      "theme_frame": "MuppetsHeader.jpg"
    },
    "colors": {
      "frame": "#889c16",
      "tab_background_text": "#a61824"
    }
  },
  "version": "2.0",
  "name": "Muppets",
  "manifest_version": 2,
  "description": "Muppets"
}