Examine source code of Krakakak Rings

{
  "theme": {
    "images": {
      "theme_frame": "KrakakakRingsTop.jpg"
    },
    "colors": {
      "frame": "#00ffcc",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Krakakak Rings",
  "manifest_version": 2,
  "description": "Neon Glowing Rings on a dark fiber background. Works well with Firefox icons small size and the menu bar hidden."
}