Examine source code of www.emperor.gr

{
  "theme": {
    "images": {
      "theme_frame": "emperor_header_v2.jpg"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#000"
    }
  },
  "version": "2.0",
  "name": "www.emperor.gr",
  "manifest_version": 2,
  "description": "<a href=\"https://outgoing.prod.mozaws.net/v1/9fd8c83f02c63fe9e3e928dd9d1cc8dc890663c4342f375cbe21a43a4efffdd4/http%3A//www.emperor.gr\" rel=\"nofollow\">www.emperor.gr</a>"
}