Examine source code of The Moose

{
  "theme": {
    "images": {
      "theme_frame": "Moosie.JPG"
    },
    "colors": {
      "frame": "#754815",
      "tab_background_text": "#754815"
    }
  },
  "version": "2.0",
  "name": "The Moose",
  "manifest_version": 2,
  "description": "This picture belongs to the wonderful artist Nyaasu from <a href=\"https://outgoing.prod.mozaws.net/v1/f5084a95acbd26898cd3b7eea8d6d5b92a6b2775971ff76d7ff4a405450b7561/http%3A//DeviantArt.com\" rel=\"nofollow\">DeviantArt.com</a>. For kudos go to that person and tell them that they are a wonderful artist! :D"
}