Examine source code of Letterpress heidelberg

{
  "theme": {
    "images": {
      "theme_frame": "header.jpg"
    },
    "colors": {
      "frame": "#b56d2a",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Letterpress heidelberg",
  "manifest_version": 2,
  "description": "letterpress with original heidelberg @ <a href=\"https://outgoing.prod.mozaws.net/v1/6db1f21d2dcc1236ed2d9afc265cd21f4719b679ce58dab9aebe1ae29fa934a2/http%3A//www.polyprint24.be\" rel=\"nofollow\">www.polyprint24.be</a>"
}