Examine source code of RuneScapez Rework

{
  "theme": {
    "images": {
      "theme_frame": "header.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "RuneScapez Rework",
  "manifest_version": 2,
  "description": "The official Rework Theme for <a href=\"https://outgoing.prod.mozaws.net/v1/d305b5f8926fe5a37ebd616439baa681abc81062a48cfbcb4022658f686a1cd4/http%3A//RuneScapez.com\" rel=\"nofollow\">RuneScapez.com</a>"
}