Examine source code of DeadMaster v2

{
  "theme": {
    "images": {
      "theme_frame": "header.jpg"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#000"
    }
  },
  "version": "2.0",
  "name": "DeadMaster v2",
  "manifest_version": 2,
  "description": "<a href=\"https://outgoing.prod.mozaws.net/v1/517074a5196355df958a4c33a12c2816c017877bf3eb4ff330dce9cf88d95b9f/http%3A//mikuru.net\" rel=\"nofollow\">http://mikuru.net</a>"
}