Examine source code of Show Arts 3

{
  "theme": {
    "images": {
      "theme_frame": "header12.jpg"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Show Arts 3",
  "manifest_version": 2,
  "description": "Show Arts\n<a href=\"https://outgoing.prod.mozaws.net/v1/e6df897058c582e5ccb430f39424b3e8f55498c69620198e5cbfa342d5f8ee93/http%3A//www.showarts.com.br\" rel=\"nofollow\">www.showarts.com.br</a>"
}