Examine source code of Firefox Grabs the World

{
  "theme": {
    "images": {
      "theme_frame": "Firefox-Headder-1.jpg"
    },
    "colors": {
      "frame": "#ffca59",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Firefox Grabs the World",
  "manifest_version": 2,
  "description": "Just a Simple take on the Firefox Logo.\nDesigned for Firefox For Mac Users"
}