This is the only way to do it IMO.
You don’t have to pull it by URL. All I do is this.
fwconsole ma downloadinstall versionupgrade
My full process:
yum upgrade -y
fwconsole ma upgradeall
fwconsole chown
fwconsole reload
reboot
fwconsole ma downloadinstall versionupgrade
fwconsole reload
fwconsole versionupgrade --check
fwconsole versionupgrade --upgrade
fwconsole chown
fwconsole reload
reboot
fwconsole ma upgradeall
fwconsole chown
fwconsole reload
reboot