Examine source code of Letras Bonitas

{
  "manifest_version": 3,
  "name": "Letras Bonitas",
  "version": "1.0.0",
  "description": "Apply beautiful, stylish fonts to any webpage. Choose from a curated collection of pretty fonts (letras bonitas) to make text more readable and elegant.",
  "author": "Letras Bonitas",
  "icons": {
    "48": "icons/icon.svg",
    "96": "icons/icon.svg"
  },
  "action": {
    "default_icon": {
      "16": "icons/icon.svg",
      "32": "icons/icon.svg"
    },
    "default_title": "Letras Bonitas - Pretty Fonts",
    "default_popup": "popup/popup.html"
  },
  "permissions": [
    "storage",
    "activeTab"
  ],
  "optional_host_permissions": [
    "https://fonts.googleapis.com/*",
    "https://fonts.gstatic.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content/content.js"
      ],
      "css": [
        "content/content.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "letras-bonitas@addon",
      "strict_min_version": "128.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}