how to download orginal Firmware to IOS device

plz subscibe and like and comment
—————————————————————————————
page:
—————————————————————————————-
links:
http://www.felixbruns.de/iPod/firmware/
————————————————
http://www.ipswdownloader.com/download-iphone-ipsw-files.php
————————————————
https://ipsw.me/ .