Examine source code of Gimp Broken Glass

{
  "theme": {
    "images": {
      "theme_frame": "header.jpg"
    },
    "colors": {
      "frame": "#ffffcc",
      "tab_background_text": "#f6f585"
    }
  },
  "version": "2.0",
  "name": "Gimp Broken Glass",
  "manifest_version": 2,
  "description": "Broken Glass with Gimp\nBrush <a href=\"https://outgoing.prod.mozaws.net/v1/133c600303789e3504de2032329631e0adf875922a51e1e5331af82a2d429743/http%3A//gimpbrush.com\" rel=\"nofollow\">http://gimpbrush.com</a>"
}