Examine source code of Save the Tiger by Lucky9

{
  "theme": {
    "images": {
      "theme_frame": "l9-n6-header.jpg"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#000"
    }
  },
  "version": "2.0",
  "name": "Save the Tiger by Lucky9",
  "manifest_version": 2,
  "description": "<a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/2277cf5a63aed13ba7dd5c4db9db9b597a55184779520d80992bfe0f1ecddc32/http%3A//www.savethetigerfund.org/\">http://www.savethetigerfund.org/</a>"
}