Examine source code of Sad Kitty

{
  "theme": {
    "images": {
      "theme_frame": "SadKitty.jpg"
    },
    "colors": {
      "frame": "#e89937",
      "tab_background_text": "#0a0000"
    }
  },
  "version": "2.0",
  "name": "Sad Kitty",
  "manifest_version": 2,
  "description": "A sad little kitty has come to visit your desk top. He looks so hungry...Remember if you feed him he will stay."
}