Examine source code of Doorway Elsewhere

{
  "theme": {
    "images": {
      "theme_frame": "firefoxbanner.jpg"
    },
    "colors": {
      "frame": "#828282",
      "tab_background_text": "#f7f4f4"
    }
  },
  "version": "2.0",
  "name": "Doorway Elsewhere",
  "manifest_version": 2,
  "description": "image inspired by Hwei (<a href=\"https://outgoing.prod.mozaws.net/v1/1eed9f3a37f347fe07020cea3a617242ce341573669d3189ac385e7de7497c23/http%3A//invisiblecities.comicgenesis.com/\" rel=\"nofollow\">http://invisiblecities.comicgenesis.com/</a>), who I wish I could be half as good an artist as :)"
}