original: Mobile browsers are optimized so as to display Web content most effectively for small screens on portable devices.
simplifications: Mobile browsers are created to display Web content effectively for small screens on portable devices. Mobile browsers are optimized for viewing on a small screen. Mobile browsers are optimized to display content on small screens. Mobile browsers are optimized to best show Web content on small screens of portable devices. Mobile browsers are made to show Web content on a small screen in the most effective way possible. Mobile browsers are made to best display Web content for small screens on portable devices. Mobile browsers are optimized to display Web content most effectively for small screens on portable devices. Mobile browsers are designed to show Web content well on small screens. Mobile browsers are made to display content in a better way for small screens. Mobile browsers are optimized to display Web content most directly on small screens on portable devices.