Examine source code of Exotic blue planet

{
  "theme": {
    "images": {
      "theme_frame": "planet3ff.jpg"
    },
    "colors": {
      "frame": "#edaf8b",
      "tab_background_text": "#f2ee9e"
    }
  },
  "version": "2.0",
  "name": "Exotic blue planet",
  "manifest_version": 2,
  "description": "a blue glowing planet for your FirefoX"
}