Examine source code of Calendar Wizard

{
  "manifest_version": 2,
  "name": "Calendar Wizard",
  "version": "1.4",
  "description": "Save enrollments to Google Calendar or download as a .ical file.",
  "icons": {
    "48": "icons/calendar-icon-48.png",
    "96": "icons/calendar-icon-96.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://members.hoofers.org/*",
        "https://members.hoofermountaineering.org/*",
        "https://events.hooferouting.org/*",
        "https://events.hooferscuba.org/*",
        "https://events.hoofersns.org/*",
        "https://lessons.hoofersailing.org/*"
      ],
      "js": [
        "build/content.min.js"
      ],
      "css": [
        "build/style.css"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "calendar@aaron--cohen.web.app"
    }
  },
  "permissions": [
    "contextMenus",
    "tabs",
    "identity",
    "storage",
    "webNavigation"
  ],
  "background": {
    "scripts": [
      "build/background.min.js"
    ]
  }
}