Examine source code of Sunflower Fields Forever

{
  "theme": {
    "images": {
      "theme_frame": "sffheader.png"
    },
    "colors": {
      "frame": "#ffd900",
      "tab_background_text": "#2c9100"
    }
  },
  "version": "2.0",
  "name": "Sunflower Fields Forever",
  "manifest_version": 2,
  "description": "Tribute to Mother 3. \n\nThanks to KingDarian for a bit of help on the background."
}