Examine source code of Birds in winter

{
  "theme": {
    "images": {
      "theme_frame": "BirdsHeader2cpt.jpg"
    },
    "colors": {
      "frame": "#ad0909",
      "tab_background_text": "#bf0d0d"
    }
  },
  "version": "2.0",
  "name": "Birds in winter",
  "manifest_version": 2,
  "description": "Birds winter snow cold snowflakes"
}