Examine source code of green ray

{
  "theme": {
    "images": {
      "theme_frame": "greenrayfirefox.jpg"
    },
    "colors": {
      "frame": "#9ce322",
      "tab_background_text": "#00ff44"
    }
  },
  "version": "2.0",
  "name": "green ray",
  "manifest_version": 2,
  "description": "a green ray of light"
}