Examine source code of MTM-Persona Dark

{
  "theme": {
    "images": {
      "theme_frame": "mtm_firefox_header_logo_05.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "MTM-Persona Dark",
  "manifest_version": 2,
  "description": "Design is based on the logo and style of MTM - a company that runs an online shop for used motorbike parts.\nCheck it out:\n<a href=\"https://outgoing.prod.mozaws.net/v1/fa13cda05d5f3dc3ea3a25439acfaa0226d873a6c30f0a5a97bcfd321993c28b/http%3A//www.mopart.de\" rel=\"nofollow\">http://www.mopart.de</a>"
}