Examine source code of ModdingDev

{
  "theme": {
    "images": {
      "theme_frame": "ffmd.png"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "ModdingDev",
  "manifest_version": 2,
  "description": "<a href=\"https://outgoing.prod.mozaws.net/v1/b835ed27d940bfe8ceef9b3488ea5f0e81f4d15d048b8ba01cddb2dc1535e5cb/http%3A//ModdingDev.com\" rel=\"nofollow\">ModdingDev.com</a> persona created by infra"
}