Examine source code of Dove with Cross

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#f9f0cc"
    }
  },
  "version": "2.0",
  "name": "Dove with Cross",
  "manifest_version": 2,
  "description": "<a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/55a24f7f21bef4cbc28244fe3de7fd6868fa4f5169bf3aaea5c626b96630abc4/https%3A//www.youtube.com/watch%3Fv=swIcX57vYDI\">https://www.youtube.com/watch?v=swIcX57vYDI</a>"
}