Examine source code of black-Windows 7 Firefox

{
  "theme": {
    "images": {
      "theme_frame": "Firefox_in_Windows7_black.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "black-Windows 7 Firefox",
  "manifest_version": 2,
  "description": "Black-Windows 7 Firefox with blue fading. Looks better on smaller headers :)"
}