Examine source code of Zukitwo-Gnome

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#cccccc",
      "tab_background_text": "#2c2c2c"
    }
  },
  "version": "2.0",
  "name": "Zukitwo-Gnome",
  "manifest_version": 2,
  "description": "This theme is designed to complement the Gnome theme Zukitwo here: <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/35235b0bd1034de9400ce0f116449aee2483cd9c1d4eb8b561fc4dd11f6e86f9/http%3A//gnome-look.org/content/show.php/Zukitwo%3Fcontent=140562\">http://gnome-look.org/content/show.php/Zukitwo?content=140562</a>"
}