sudo apt update && sudo apt install extrepo -y

sudo extrepo enable librewolf

sudo apt update && sudo apt install librewolf -y

sudo dnf config-manager --add-repo https://repo.librewolf.net/librewolf.repo

sudo dnf install librewolf

You should accept any prompts wanting to import the GPG key with the fingerprint 662E3CDD6FE329002D0CA5BB40339DD82B12EF16.