mozilla-nss from mozilla project

For openSUSE Tumbleweed run the following as root:

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

For 16.0 run the following as root:

zypper addrepo https://download.opensuse.org/repositories/mozilla/16.0/mozilla.repo
zypper refresh
zypper install mozilla-nss

For openSUSE Leap 15.6 run the following as root:

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