Examine source code of Red Leaf

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#a80a0a",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Red Leaf",
  "manifest_version": 2,
  "description": "Based on the wallpaper \"Red Leaf\" submitted by draco under creative commons - Attribution-Share Alike 3.0 Unported - license.\n\nThe original work and informations about the owner are available here: \n<a href=\"https://outgoing.prod.mozaws.net/v1/2f6fd2a914f748e52a118bbe6ecf18cffc6434b9f634f72205c91ddf87d4e9d5/http%3A//www.gnome-look.org/content/show.php/Red%2BLeaf%3Fcontent=91731&amp;PHPSESSID=7fe3b5f3fc1a44eb014126fbcb2cf25b\" rel=\"nofollow\">http://www.gnome-look.org/content/show.php/Red+Leaf?content=91731&amp;PHPSESSID=7fe3b5f3fc1a44eb014126fbcb2cf25b</a>"
}