Examine source code of Immelmanns Miranda

{
  "theme": {
    "images": {
      "theme_frame": "Immelmann1.PNG"
    },
    "colors": {
      "frame": "#8f8b8b",
      "tab_background_text": "#4a3535"
    }
  },
  "version": "2.0",
  "name": "Immelmanns Miranda",
  "manifest_version": 2,
  "description": "Art piece by an amazing online comic artist, Immelmann. I made this to pay homage to my favorite web comic. <a href=\"https://outgoing.prod.mozaws.net/v1/ebaeda8981f4cdd09b9723a6b17594afe75ff08edbc9d06a7246b9e79a5e4f7f/http%3A//concessioncomic.com/\" rel=\"nofollow\">http://concessioncomic.com/</a>"
}