Examine source code of Dave and Dirk

{
  "theme": {
    "images": {
      "theme_frame": "tumblr_m84vt2ArW01qllibto1_1280_2.jpg"
    },
    "colors": {
      "frame": "#8ac3ff",
      "tab_background_text": "#f2ebe4"
    }
  },
  "version": "2.0",
  "name": "Dave and Dirk",
  "manifest_version": 2,
  "description": "Artwork not mine.\nSource:\n<a href=\"https://outgoing.prod.mozaws.net/v1/c69eca91de78b39442bb2693206ccd0d82a7c73dbc822f22e3c0a95060357931/http%3A//25.media.tumblr.com/tumblr_m84vt2ArW01qllibto1_1280.jpg\" rel=\"nofollow\">http://25.media.tumblr.com/tumblr_m84vt2ArW01qllibto1_1280.jpg</a>"
}