Examine source code of Metadata Remover

{
  "manifest_version": 2,
  "name": "Metadata Remover",
  "description": "Remove metadata from images and PDFs entirely in your browser — batch, fast, private.",
  "version": "1.0.0",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "permissions": [
    "downloads",
    "storage"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "Metadata Remover"
  },
  "web_accessible_resources": [
    "lib/pdf-lib.min.js",
    "lib/jszip.min.js",
    "icons/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "0xgzofficial@gmail.com",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}