Examine source code of Simons Cat

{
  "theme": {
    "images": {
      "theme_frame": "simon25001.PNG"
    },
    "colors": {
      "frame": "#adadad",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Simons Cat",
  "manifest_version": 2,
  "description": ";o Meow"
}