Examine source code of Flashcard Creator

{
  "manifest_version": 3,
  "name": "Flashcard Creator",
  "version": "1.0",
  "description": "Create and review flashcards with this simple extension",
  "permissions": [
    "storage"
  ],
  "action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html"
  },
  "icons": {
    "48": "icon.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "extensionisname@example.org",
      "strict_min_version": "42.0"
    }
  }
}