Examine source code of Auto-Sort Bookmarks

{
  "author": "Eric Bixby",
  "background": {
    "scripts": [
      "background/auto-sort-bookmarks.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "40": "content/images/icon-40.png"
    },
    "default_popup": "content/popup.html?panel=main",
    "default_title": "Auto-Sort Bookmarks",
    "browser_style": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "sortbookmarks@bouanto",
      "strict_min_version": "63.0"
    }
  },
  "default_locale": "en",
  "description": "Sort bookmarks by multiple criteria.",
  "icons": {
    "16": "content/images/icon-16.png",
    "32": "content/images/icon-32.png",
    "40": "content/images/icon-40.png",
    "48": "content/images/icon-48.png",
    "128": "content/images/icon-128.png"
  },
  "manifest_version": 2,
  "name": "Auto-Sort Bookmarks",
  "options_ui": {
    "open_in_tab": true,
    "page": "content/settings.html?panel=settings",
    "browser_style": true
  },
  "permissions": [
    "bookmarks",
    "downloads",
    "history",
    "storage",
    "tabs"
  ],
  "version": "3.4.5"
}