Examine source code of Apple iPhone 4

{
  "theme": {
    "images": {
      "theme_frame": "persona-header-iphone4.png"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#8c8c8c"
    }
  },
  "version": "2.0",
  "name": "Apple iPhone 4",
  "manifest_version": 2,
  "description": "Show your love for the Apple iPhone4 with this sexy Firefox Persona courtesy of Fluid Creativity."
}