Examine source code of Green Runes

{
  "theme": {
    "images": {
      "theme_frame": "runes.jpg"
    },
    "colors": {
      "frame": "#b5b5b5",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Green Runes",
  "manifest_version": 2,
  "description": "Green runes and summoning circle... but what will it call forth?"
}