Examine source code of firefox better blue

{
  "theme": {
    "images": {
      "theme_frame": "front.jpg"
    },
    "colors": {
      "frame": "#d1d1d1",
      "tab_background_text": "#d6d6d6"
    }
  },
  "version": "2.0",
  "name": "firefox better blue",
  "manifest_version": 2,
  "description": "firefox better blue"
}