Examine source code of myDictionary

{
  "manifest_version": 3,
  "name": "myDictionary",
  "version": "1.0.0",
  "description": "Look up definitions for selected words and export them to CSV",
  "default_locale": "en",
  "permissions": [
    "contextMenus",
    "storage",
    "scripting",
    "activeTab",
    "notifications",
    "downloads"
  ],
  "host_permissions": [
    "https://api.dictionaryapi.dev/*",
    "https://www.google.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png"
    }
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "smartdictlookup@example.com",
      "strict_min_version": "115.0"
    }
  }
}