Examine source code of ULTIMATUM

{
  "theme": {
    "images": {
      "theme_frame": "ENCABEZADOAMAZONAS4.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "ULTIMATUM",
  "manifest_version": 2,
  "description": "<a href=\"https://outgoing.prod.mozaws.net/v1/2ffa429d5fb96bbd91bf8ece7308779e629758ea3a0ab529be6ca898b6b8cdf7/http%3A//www.sonidoamazonas.mex.tl\" rel=\"nofollow\">www.sonidoamazonas.mex.tl</a>"
}