Examine source code of Simple Password Manager

{
  "manifest_version": 3,
  "name": "Simple Password Manager",
  "version": "1.0",
  "description": "Store your passwords securely, encrypted locally with your master password. All data stays on your device.",
  "permissions": [
    "storage"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icons/icon-48.png",
      "96": "icons/icon-96.png"
    }
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "simple-password-manager@example.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "description": "This extension does not collect, transmit, or share any user data. All password data is encrypted and stored locally on the user's device."
      }
    }
  }
}