Examine source code of Fallen Heroes MCC

{
  "theme": {
    "images": {
      "theme_frame": "fallenheroesmccpersona.jpg"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#000"
    }
  },
  "version": "2.0",
  "name": "Fallen Heroes MCC",
  "manifest_version": 2,
  "description": "<a href=\"https://outgoing.prod.mozaws.net/v1/6c5172e6dcdcb4b25160bf8afe5f7f81126e4ff5a456b5722f1b0f1951db9edb/http%3A//www.fallenheroesmcc.com\" rel=\"nofollow\">www.fallenheroesmcc.com</a>"
}