I think, I have the same problem. The librewolf repo links the deb package to the gitlab release page.
wget https://repo.librewolf.net./pool/librewolf-130.0.1-1-linux-x86_64-deb.deb
will connect to https://gitlab.com/api/v4/projects/44042130/packages/generic/librewolf/130.0.1-1/librewolf-130.0.1-1-linux-x86_64-deb.deb
Http caching is not possible.