For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:ojkastl_buildservice:Branch_Virtualization/openSUSE_Tumbleweed/home:ojkastl_buildservice:Branch_Virtualization.repo
zypper refresh
zypper install firectl
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:ojkastl_buildservice:Branch_Virtualization/15.6/home:ojkastl_buildservice:Branch_Virtualization.repo
zypper refresh
zypper install firectl
For 15.5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:ojkastl_buildservice:Branch_Virtualization/15.5/home:ojkastl_buildservice:Branch_Virtualization.repo
zypper refresh
zypper install firectl