Examine source code of Richard III

{
  "theme": {
    "images": {
      "theme_frame": "RichardSkin.jpg"
    },
    "colors": {
      "frame": "#129489",
      "tab_background_text": "#eaed26"
    }
  },
  "version": "2.0",
  "name": "Richard III",
  "manifest_version": 2,
  "description": "A tribute to King Richard III. As far as I can find out this image, created in the 1400's, has passed into public domain."
}