Examine source code of Dark Butterfly

{
  "theme": {
    "images": {
      "theme_frame": "1copy.jpg"
    },
    "colors": {
      "frame": "#f5f2f2",
      "tab_background_text": "#f0f1f5"
    }
  },
  "version": "2.0",
  "name": "Dark Butterfly",
  "manifest_version": 2,
  "description": "red, grunge, grungy, heart, butterflies, butterfly, abstract. My matching wallpaper can be found at: <a href=\"https://outgoing.prod.mozaws.net/v1/fb4c7937d884dac38f41b5b71074728f4045a578ba9c66fa64fe887c6ef30327/http%3A//abstract.desktopnexus.com/wallpaper/607927/\" rel=\"nofollow\">http://abstract.desktopnexus.com/wallpaper/607927/</a>"
}