Samsung changed the icon with the new version of the browser. About the only thing you can do is use an app like
Icon Changer, find an icon that looks like the old globe icon, and change it. (With most apps, you can uninstall the new version, install the older version [assuming you back up your apps], capture the icon from it, uninstall it, reinstall the new version and change the icon to the one you captured. But you can't uninstall the Samsung browser. and you can't install the old version when the new version is installed.)