Examine source code of Henk2xs

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#d6d6d6",
      "tab_background_text": "#292929"
    }
  },
  "version": "2.0",
  "name": "Henk2xs",
  "manifest_version": 2,
  "description": "Oranje <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/76fbd6621013bfa2583ee3a660484c57f311e057aa5a001f2845f039d253e4d6/http%3A//one2xs.com/\" title=\"One2xs\">One2xs</a> theme"
}