I try to run ASP.NET configuration page from Microsoft Visual Studio 2010, a .aspx page which communicates with SQL server to load the page. But there is no new tab loading to notify that a webpage is going to load. Firefox remains silent but chrome, IE, safari browsers do load those pages. As it looks like a technical issue of Microsoft Visual Studio I asked this question in forums like stackoverflow.com and superuser.com and I got reply that this could be browser specific issue as they don't know the solution and replied a workaround as "Close Firefox. Then run this configuration page. Firefox will be launched and this page will be loaded" (it worked) and "configure firewalls to allow Firefox internet access" which already has been configured. That is why I try to get solution from here. Thank you