Examine source code of Firefox Red

{
  "theme": {
    "images": {
      "theme_frame": "encabezado3.jpg"
    },
    "colors": {
      "frame": "#40ff00",
      "tab_background_text": "#bab4b4"
    }
  },
  "version": "2.0",
  "name": "Firefox Red",
  "manifest_version": 2,
  "description": "A cool Firefox Skin"
}