Examine source code of ForestFox

{
  "theme": {
    "images": {
      "theme_frame": "mozillaheader2.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "ForestFox",
  "manifest_version": 2,
  "description": "First draft of a theme that combines the rich power of the forest with the elegant mystery of the fog that pervades it."
}