Hi Mahammed,
Mendix is a one page application, which means that the browser always will stay on “index.html” and never actually navigates to other pages.
If you want the user to reload the same page after a browser refresh, you can rewrite the URL. This can easily be done by using the native Mendix functionality (see below), or using some widget like the Set URL in combination with a deeplink.
Good luck!
Johan