For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:akontsevich/openSUSE_Tumbleweed/home:akontsevich.repo
zypper refresh
zypper install rss-glx
For openSUSE Factory ARM run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:akontsevich/openSUSE_Factory_ARM/home:akontsevich.repo
zypper refresh
zypper install rss-glx
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:akontsevich/15.6/home:akontsevich.repo
zypper refresh
zypper install rss-glx
For 15.5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:akontsevich/15.5/home:akontsevich.repo
zypper refresh
zypper install rss-glx