SamFirm v0.4.1 is widely considered the "Gold Standard" for downloading official Samsung firmware. Sfilmywapin New - 3.79.94.248
Download it, but also keep a copy of Frija or SamFirm.js handy in case Samsung changes their server protocols in the future, which might break this older tool. For now, it works flawlessly. Igo-8.3.1.59883-pc-nav-n-go-to-install-and-use-a-laptop-multilingual.zip - 3.79.94.248