Examine source code of Porn Blocker

{
  "manifest_version": 3,
  "name": "Porn Blocker",
  "description": "Block porn in Firefox with this simple, free extension.",
  "version": "2.0.24",
  "icons": {
    "16": "assets/img/icon16.png",
    "48": "assets/img/icon48.png",
    "128": "assets/img/icon128.png"
  },
  "action": {
    "default_icon": {
      "16": "assets/img/icon16.png",
      "48": "assets/img/icon48.png",
      "128": "assets/img/icon128.png"
    },
    "default_popup": "popup.html",
    "default_title": "Porn Blocker"
  },
  "options_page": "options.html",
  "permissions": [
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "blockedSites.js",
        "contentscript.js"
      ],
      "run_at": "document_start"
    }
  ],
  "background": {
    "scripts": [
      "service_worker.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "relay-porn-blocker@joinrelay.app",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}