Examine source code of Restore Google Maps Button

{
  "manifest_version": 3,
  "name": "Restore Google Maps Button",
  "version": "1.1.0",
  "description": "Restores the Maps button in Google search results.",
  "author": "Antonin Sioly",
  "permissions": [
    "storage",
    "webNavigation",
    "tabs"
  ],
  "host_permissions": [
    "https://www.google.ad/search*",
    "https://www.google.at/search*",
    "https://www.google.ba/search*",
    "https://www.google.be/search*",
    "https://www.google.bg/search*",
    "https://www.google.by/search*",
    "https://www.google.ch/search*",
    "https://www.google.co.jp/search*",
    "https://www.google.co.uk/search*",
    "https://www.google.com.au/search*",
    "https://www.google.com.ua/search*",
    "https://www.google.com/search*",
    "https://www.google.cy/search*",
    "https://www.google.cz/search*",
    "https://www.google.de/search*",
    "https://www.google.dk/search*",
    "https://www.google.ee/search*",
    "https://www.google.es/search*",
    "https://www.google.fi/search*",
    "https://www.google.fr/search*",
    "https://www.google.gr/search*",
    "https://www.google.hr/search*",
    "https://www.google.hu/search*",
    "https://www.google.ie/search*",
    "https://www.google.is/search*",
    "https://www.google.it/search*",
    "https://www.google.li/search*",
    "https://www.google.lt/search*",
    "https://www.google.lu/search*",
    "https://www.google.lv/search*",
    "https://www.google.mc/search*",
    "https://www.google.md/search*",
    "https://www.google.me/search*",
    "https://www.google.mk/search*",
    "https://www.google.mt/search*",
    "https://www.google.nl/search*",
    "https://www.google.no/search*",
    "https://www.google.pl/search*",
    "https://www.google.pt/search*",
    "https://www.google.ro/search*",
    "https://www.google.rs/search*",
    "https://www.google.se/search*",
    "https://www.google.si/search*",
    "https://www.google.sk/search*",
    "https://www.google.sm/search*"
  ],
  "action": {
    "default_icon": "icons/icon.svg",
    "default_popup": "ui/popup.html",
    "default_title": "Restore Google Maps Button"
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.google.ad/search*",
        "https://www.google.at/search*",
        "https://www.google.ba/search*",
        "https://www.google.be/search*",
        "https://www.google.bg/search*",
        "https://www.google.by/search*",
        "https://www.google.ch/search*",
        "https://www.google.co.jp/search*",
        "https://www.google.co.uk/search*",
        "https://www.google.com.au/search*",
        "https://www.google.com.ua/search*",
        "https://www.google.com/search*",
        "https://www.google.cy/search*",
        "https://www.google.cz/search*",
        "https://www.google.de/search*",
        "https://www.google.dk/search*",
        "https://www.google.ee/search*",
        "https://www.google.es/search*",
        "https://www.google.fi/search*",
        "https://www.google.fr/search*",
        "https://www.google.gr/search*",
        "https://www.google.hr/search*",
        "https://www.google.hu/search*",
        "https://www.google.ie/search*",
        "https://www.google.is/search*",
        "https://www.google.it/search*",
        "https://www.google.li/search*",
        "https://www.google.lt/search*",
        "https://www.google.lu/search*",
        "https://www.google.lv/search*",
        "https://www.google.mc/search*",
        "https://www.google.md/search*",
        "https://www.google.me/search*",
        "https://www.google.mk/search*",
        "https://www.google.mt/search*",
        "https://www.google.nl/search*",
        "https://www.google.no/search*",
        "https://www.google.pl/search*",
        "https://www.google.pt/search*",
        "https://www.google.ro/search*",
        "https://www.google.rs/search*",
        "https://www.google.se/search*",
        "https://www.google.si/search*",
        "https://www.google.sk/search*",
        "https://www.google.sm/search*"
      ],
      "js": [
        "scripts/content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{49e1d5c5-c5b5-4c5b-8b5b-5b5b5b5b5b5b}",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}