Examine source code of Helenahoeve

{
  "theme": {
    "images": {
      "theme_frame": "helenahoeve_header.png"
    },
    "colors": {
      "frame": "#808080",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Helenahoeve",
  "manifest_version": 2,
  "description": "Background of <a href=\"https://outgoing.prod.mozaws.net/v1/314a2cd8733d94150e18049be5bf04fb2e1c56b528a6b03399a9f145a0b6740c/http%3A//www.helenahoeve.nl\" rel=\"nofollow\">www.helenahoeve.nl</a>"
}