Examine source code of Goodnight Sunflower

{
  "theme": {
    "images": {
      "theme_frame": "Summer20061472.jpg"
    },
    "colors": {
      "frame": "#2a5918",
      "tab_background_text": "#fcfcfc"
    }
  },
  "version": "2.0",
  "name": "Goodnight Sunflower",
  "manifest_version": 2,
  "description": "This is a picture I took one summer night of a beautiful Sunflower."
}