Add a script to page #bookmarklet

add-script.js

javascript: ((s) => {
  "use strict";
  if (s === atob("JXM=")) s = prompt();
  /**
   * More bookmarklets at
   * https://gist.github.com/iamandrewluca/61feacf07bc4f2f50e70f986c2e9b2d2
   * When used as a browser search engine `s` will be what user typed in address bar
   */

  const script = document.createElement("script");
  script.type = "text/javascript";
  script.src = s;
	document.head.appendChild(script);
})(`%s`);