Examine source code of Firefox 2x Vision

{
  "theme": {
    "images": {
      "theme_frame": "FireFoxX2Top.jpg"
    },
    "colors": {
      "frame": "#999999",
      "tab_background_text": "#666666"
    }
  },
  "version": "2.0",
  "name": "Firefox 2x Vision",
  "manifest_version": 2,
  "description": "Firefox logo x2 faded in the background with a nice orange and blue gradient."
}