Examine source code of sunflower field

{
  "theme": {
    "images": {
      "theme_frame": "sunflowers2.jpg"
    },
    "colors": {
      "frame": "#e3a410",
      "tab_background_text": "#e3a410"
    }
  },
  "version": "2.0",
  "name": "sunflower field",
  "manifest_version": 2,
  "description": "sunflower field in summertime beautiful !! "
}