GreaseMonkey: Stay in Old Unity Asset Store

old-assetstore.js

// ==UserScript==
// @name     Force Old Unity Asset Store
// @version  2
// @include  https://www.assetstore.unity3d.com/#!/content/*
// @include  https://assetstore.unity.com/packages/*
// @run-at document-start
// @grant    none
// ==/UserScript==

// https://unitycoder.com/blog/2018/09/23/browser-plugin-stay-in-old-asset-store/

if (window.location.toString().indexOf("https://assetstore.unity.com/packages/")>-1)
{
	// arriving to new store, jump to old.. FAST!
  var ids=window.location.toString().split('-');
  if (ids!=null && ids.length>0)
  {
    // take asset number
  	window.location = "https://www.assetstore.unity3d.com/en/?stay#!/content/"+ids[ids.length-1];
  }
}else{
  // we are already in old store
	window.location.search = "?stay-a-while...stay-forever!";
}