Examine source code of Gecko 2

{
  "theme": {
    "images": {
      "theme_frame": "gecko1up.png"
    },
    "colors": {
      "frame": "#c98942",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Gecko 2",
  "manifest_version": 2,
  "description": "A gecko in the namib desert near swakopmund\nproudly presented by <a href=\"https://outgoing.prod.mozaws.net/v1/4f396cf93dd38668d864d7f0e22714637d91b6498b642e1bdb463cf399415a41/http%3A//namibsand.de\" rel=\"nofollow\">namibsand.de</a>"
}