Examine source code of dancing man

{
  "theme": {
    "images": {
      "theme_frame": "13.png"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "dancing man",
  "manifest_version": 2,
  "description": "This animation personas lovers dedicated to Firefox\n<a href=\"https://outgoing.prod.mozaws.net/v1/74f4c4a23445c3276959c0f9a7fc528ed9b4857f5b12d7eb1bb143242eaac2ac/http%3A//www.a-y.yourgig.ir\" rel=\"nofollow\">www.a-y.yourgig.ir</a>"
}