Examine source code of Currencia

{
  "manifest_version": 3,
  "name": "Currencia",
  "version": "1.0.0",
  "description": "Select any price on a web page and instantly see it converted to your currency.",
  "author": "Minduos",
  "browser_specific_settings": {
    "gecko": {
      "id": "currencia@minduos.dev",
      "strict_min_version": "115.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://cdn.jsdelivr.net/*",
    "https://latest.currency-api.pages.dev/*"
  ],
  "background": {
    "scripts": [
      "background/rates.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content/parser.js",
        "content/popup.js",
        "content/detector.js"
      ],
      "run_at": "document_idle",
      "all_frames": true
    }
  ],
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": true
  },
  "action": {
    "default_title": "Currencia — click for settings",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "96": "icons/icon-96.png",
      "128": "icons/icon-128.png"
    }
  }
}