Examine source code of Squirrels Fun

{
  "theme": {
    "images": {
      "theme_frame": "sqr.png"
    },
    "colors": {
      "frame": "#151096",
      "tab_background_text": "#17349c"
    }
  },
  "version": "2.0",
  "name": "Squirrels Fun",
  "manifest_version": 2,
  "description": "lots of squirrels"
}