Examine source code of sheep incognito

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#82003f"
    }
  },
  "version": "2.0",
  "name": "sheep incognito",
  "manifest_version": 2,
  "description": "the picture of the sheep found on <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/75fd6a07b3a22b18eb53eef3cfadf0849a1c282dadf51bf6e54a9fd07eb65688/http%3A//www.charisma-art.com/Sheep-Incognito_Gallery_Shop\">www.charisma-art.com/Sheep-Incognito_Gallery_Shop</a>"
}