Examine source code of Vampire Rose

{
  "theme": {
    "images": {
      "theme_frame": "VRoseHeader.jpg"
    },
    "colors": {
      "frame": "#c21510",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Vampire Rose",
  "manifest_version": 2,
  "description": "Shimmering in a candle's light, these dark Vampiric roses will grace your Firefox's header with their mystery and dark beauty."
}