How to hide redirect URL's

I am using Essentiasl 4.4.2 and Geocortex Security Provider.   I have added the appropriate URL to teh Allowable Redirect URL's in the security settings.

 

When a user loads the site, it get's to the login screen... after they enter their credentials, everything works fine, but in the browser address bar, as it is working through the redirects, it briefly shows a couple of addresses, once of which has by server name in it.  When it comes to its final URL, it is fine (http://www.mydomain.com/suveyviewer/#) but while it is redirecting is shows the longer full addresses.  Is there a way for it to not show those addresses on the address bar, even for the brief seconds that it currently does?

 

I am using HTML5 Viewer version 2.5.1 within Essentials 4.4.2