Examine source code of FireFeather

{
  "theme": {
    "images": {
      "theme_frame": "Header.jpg"
    },
    "colors": {
      "frame": "#ffb700",
      "tab_background_text": "#fcf2c2"
    }
  },
  "version": "2.0",
  "name": "FireFeather",
  "manifest_version": 2,
  "description": "A nice dark persona based upon my own design and FireFeather logo colors and image."
}