Whenever I tried to add localhost domain with my live server domain in my facebook app domain it shows me error "App domains must match the domain of the Facebook Web Games URL (https), Mobile Site URL, Unity Binary URL, Site URL or Secure Page Tab URL. Please correct these domains: localhost". Is it possible to add the localhost domain along with my live server domain?
A good way to solve this is to use a Test App: https://developers.facebook.com/docs/apps/test-apps/
Test Apps have different settings, so you can easily use localhost without an additional platform as workaround.