MozillaFirefox-branding-openSUSE from openSUSE:Leap:15.3 project
Select Your Operating System
Add repository and install manually
For standard run the following as root:
zypper addrepo https://download.opensuse.org/repositories/openSUSE:Leap:15.3/standard/openSUSE:Leap:15.3.repo zypper refresh zypper install MozillaFirefox-branding-openSUSE