Localhost not working in chrome and firefox

Question

I am doing a web project using visual studio 2010(MVC3 Razor) and Windows 7.

My default browser is IE. When I run the project, the website working is perfectly with

Answer 1

In case the browser LAN proxy setting solution doesn't work for you:

As mentioned in this similar Q&A How to solve ERR_CONNECTION_REFUSED when trying to connect to localhost running IISExpress - Error 502 (Cannot debug from Visual Studio)?

Simply changing the port number of your web project can be a quick fix.