firefoxpwa from home:Baalthasar:PWAsForFirefox project
Select Your Operating System
Add repository and install manually
For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:Baalthasar:PWAsForFirefox/openSUSE_Tumbleweed/home:Baalthasar:PWAsForFirefox.repo zypper refresh zypper install firefoxpwa