Examine source code of Bookmark Carousel

{
  "manifest_version": 2,
  "name": "Bookmark Carousel",
  "version": "0.0.2",
  "default_locale": "en",
  "author": "DeltaMikeCharlie",
  "homepage_url": "http://bookmarkcarousel.yolasite.com/",
  "browser_specific_settings": {
    "gecko": {
      "id": "bookmarkcarousel@deltamikecharlie",
      "strict_min_version": "54.0"
    }
  },
  "options_ui": {
    "open_in_tab": true,
    "page": "options.html"
  },
  "permissions": [
    "<all_urls>",
    "bookmarks",
    "tabs",
    "storage"
  ],
  "description": "__MSG_extensionDescription__",
  "icons": {
    "16": "icons/logo16.png",
    "48": "icons/logo48.png",
    "60": "icons/logo60.png",
    "96": "icons/logo96.png",
    "128": "icons/logo128.png"
  },
  "browser_action": {
    "browser_style": true,
    "default_icon": {
      "19": "icons/logo19.png",
      "38": "icons/logo38.png"
    },
    "default_title": "__MSG_menuItemMain__",
    "default_popup": "nav.html"
  },
  "background": {
    "scripts": [
      "bookmarkcarousel.js"
    ],
    "persistent": true
  }
}