Examine source code of Modern Cite Creator

{
  "browser_action": {
    "default_icon": {
      "16": "img/16.png",
      "32": "img/32.png",
      "48": "img/48.png",
      "64": "img/64.png",
      "128": "img/128.png",
      "256": "img/256.png"
    },
    "default_popup": "html/popup.html",
    "default_title": "Modern Cite Creator"
  },
  "content_scripts": [
    {
      "css": [
        "css/cite.css"
      ],
      "exclude_matches": [
        "*://*.google.com/*",
        "*://*.bing.com/*",
        "*://*.duckduckgo.com/*",
        "*://*.yahoo.com/*",
        "*://*.ask.com/*",
        "*://*.aol.com/*",
        "*://*.yandex.com/*",
        "*://*.baidu.com/*",
        "*://*.naver.com/*",
        "*://*.ecosia.com/*"
      ],
      "js": [
        "js/date.js",
        "js/mousetrap.min.js",
        "js/cite.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "description": "Constructs debate cites from meta tags or page info and copies to clipboard.",
  "icons": {
    "16": "img/16.png",
    "32": "img/32.png",
    "48": "img/48.png",
    "64": "img/64.png",
    "128": "img/128.png",
    "256": "img/256.png"
  },
  "manifest_version": 2,
  "name": "Modern Cite Creator",
  "options_ui": {
    "page": "html/options.html"
  },
  "permissions": [
    "clipboardWrite",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "citeCreator@bathost.net"
    }
  },
  "version": "1.2.0"
}