horizon.user.js

// ==UserScript==
// @name        Horizon TV issue
// @namespace   https://github.com/jerone/UserScripts/
// @include     *horizon.tv*
// @version     1
// @grant       none
// ==/UserScript==

(function HorizonTVFixer() {

	if (window !== window.top) return;

	console.log("test 1");

	if (unsafeWindow.$) {

		console.log("test 2", unsafeWindow.$(".channel-guide"));

		unsafeWindow.$(".channel-guide").on("loaded", function() {
			console.log("test FINAL");
		});

		console.log("test 3");
	}

	console.log("test 4");

})();