I am sorry to hear you are running into this problem. Unfortunately without a local repro of this behavior it's hard to say why it is not working in Chrome and Firefox. One thing you can try however is to add the following line before the second "Connect to pop-up" step:
Manager.Wait.For<Manager>(manager => manager.Browsers.Count > 2, Manager, 10000);
This will ensure that the third popup is properly detected by our Popup Tracker.
If it still doesn't work, we'll need a local reproduction in order to continue troubleshooting. Please provide us with a copy of your test and access to your application. If it is not possible to grant us access to your application, please take a Fiddler trace using FiddlerCap
and send it to us in a zip file. A Jing video
demonstrating the issue may also help us to better understand what is happening. If you deem that information too sensitive for this forum, you can create a support ticket and attach it there. Thanks for providing the information we need to best assist you.
All the best,
the Telerik team