Examine source code of Save the tiger

{
  "theme": {
    "images": {
      "theme_frame": "savethetiger.jpg"
    },
    "colors": {
      "frame": "#7a0a0a",
      "tab_background_text": "#7d2b02"
    }
  },
  "version": "2.0",
  "name": "Save the tiger",
  "manifest_version": 2,
  "description": "Saver the tiger.\nMade by\n<a href=\"https://outgoing.prod.mozaws.net/v1/91746f59d5a559a3490f5cddefc49c355682cf9a3dc56c315431f665f13bfeb3/http%3A//www.profesionalnet.net\" rel=\"nofollow\">http://www.profesionalnet.net</a>"
}