Examine source code of BookmarksDropDown

{
  "manifest_version": 2,
  "name": "__MSG_addonName__",
  "version": "3.2.4",
  "description": "__MSG_addonDescription__",
  "browser_specific_settings": {
    "gecko": {
      "id": "bookmarksdropdown@software.donnapaul.net",
      "strict_min_version": "63.0"
    }
  },
  "homepage_url": "https://software.donnapaul.net/bookmarksdropdown/en-us/bookmarksdropdown.html",
  "developer": {
    "name": "PaulJayD",
    "url": "https://software.donnapaul.net/bookmarksdropdown/en-us/bookmarksdropdown.html"
  },
  "default_locale": "en_US",
  "permissions": [
    "<all_urls>",
    "https://www.google.com/s2/favicons?*",
    "activeTab",
    "bookmarks",
    "storage",
    "tabs"
  ],
  "options_ui": {
    "page": "bmddoptions.html"
  },
  "icons": {
    "48": "icons/bookmarksdropdown.png"
  },
  "background": {
    "scripts": [
      "bmddbackground.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>",
        "*://*.mozilla.org/*"
      ],
      "match_about_blank": true,
      "all_frames": false,
      "run_at": "document_start",
      "js": [
        "bmddcontent.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "icons/*"
  ]
}