Examine source code of Captain Nowhere

{
  "theme": {
    "images": {
      "theme_frame": "titlebar.jpg"
    },
    "colors": {
      "frame": "#6abce8",
      "tab_background_text": "#71de8e"
    }
  },
  "version": "2.0",
  "name": "Captain Nowhere",
  "manifest_version": 2,
  "description": "<a href=\"https://outgoing.prod.mozaws.net/v1/4fd9cebee3f3a70736706ef5284f35554174886bd4cb6fb0ae6aa5cfd12165cd/http%3A//CaptainNowhere.com\" rel=\"nofollow\">CaptainNowhere.com</a>"
}