The `.Dev` extension is no longer a local domain option to use in your application development configuration, what would be the best domain extensions to replace `dev`?

At sometimes your application or website developed with Laravel Framework, there is a need to, via a “link”, allow user to return to the URL- Page or route, previously called.

This is commonly necessary when showing a HTTP 404 error message screen - Page Not Found, or 403 - Forbidden (unauthorized)....