Why does the asp.net mvc application now request .map files when I check Fiddler

Question

When I started using Fiddler, I began to notice that my ASP.NET MVC application now makes requests for CSS map files.

Does anyone know how I can stop this. Here is the configuration of my package:

        bundles.Add(new StyleBundle("~/bundles/css").Include(
                "~/Content/css/*.css"
                ));

Answer 1

I think it is looking for a .map file, for example

bootstrap-theme.css.map
bootstrap.css.map

There is more information about the map here.