Examine source code of Spring optimist

{
  "theme": {
    "images": {
      "theme_frame": "9.jpg"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Spring optimist",
  "manifest_version": 2,
  "description": "Spring, holiday, blue, sky, butterflies, butterfly, luck, green, blue, red, white, daisies, flowers, camomile, clouds, happy, day, nature, color, grass, hearts, dragonfly, Easter, Real.Twilight"
}