Examine source code of Resept importer

{
  "manifest_version": 2,
  "name": "Resept importer",
  "version": "1.0",
  "description": "Capture website HTML and send to your endpoint",
  "icons": {
    "16": "favicon.ico",
    "32": "favicon.ico",
    "48": "favicon.ico",
    "128": "favicon.ico"
  },
  "permissions": [
    "activeTab",
    "storage",
    "identity",
    "tabs",
    "http://localhost/*",
    "https://localhost/*",
    "http://127.0.0.1/*",
    "https://127.0.0.1/*",
    "https://resept-rb0j.onrender.com/*",
    "https://flopieutd.github.io/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "Add recipe to Resept",
    "default_icon": {
      "16": "favicon.ico",
      "32": "favicon.ico",
      "48": "favicon.ico",
      "128": "favicon.ico"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "@resept-importer",
      "data_collection_permissions": {
        "required": [
          "websiteContent",
          "authenticationInfo"
        ]
      }
    }
  }
}