Deprecated on newer OpenWebRX+ versions. Use the built-in KeyPlugin instead. Add KeyPlugin.init(); once in your receiver init.js to get a Magic Key input in the receiver Settings section. The built-in plugin is available but is not started automatically.
This receiver plugin will allow you to set the MagicKey without typing it in the browser’s address bar.

For older OpenWebRX+ versions only, add this line in your init.js file:
Plugins.load('https://0xaf.github.io/openwebrxplus-plugins/receiver/magic_key/magic_key.js');
Learn how to load plugins.