Examine source code of Firefox 6 design 3

{
  "theme": {
    "images": {
      "theme_frame": "Fire6head.jpg"
    },
    "colors": {
      "frame": "#a39e9e",
      "tab_background_text": "#030303"
    }
  },
  "version": "2.0",
  "name": "Firefox 6 design 3",
  "manifest_version": 2,
  "description": "Firefox's tail just got bushier on orange backdrop and black text.\nHope you like this one."
}