Examine source code of Spirals Under the Cut

{
  "theme": {
    "images": {
      "theme_frame": "mozilla_header.jpg"
    },
    "colors": {
      "frame": "#8f0808",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Spirals Under the Cut",
  "manifest_version": 2,
  "description": "This was made out of fidling with SUMOPaint. :D"
}