seamonkey from mozilla project

Для openSUSE Tumbleweed запустите от имени root:

zypper addrepo https://download.opensuse.org/repositories/mozilla/openSUSE_Tumbleweed/mozilla.repo
zypper refresh
zypper install seamonkey

Для openSUSE Leap 15.6 запустите от имени root:

zypper addrepo https://download.opensuse.org/repositories/mozilla/openSUSE_Leap_15.6/mozilla.repo
zypper refresh
zypper install seamonkey

Для openSUSE Leap 15.5 запустите от имени root:

zypper addrepo https://download.opensuse.org/repositories/mozilla/openSUSE_Leap_15.5/mozilla.repo
zypper refresh
zypper install seamonkey