The Guix package for Librewolf points at 
https://gnuzilla.gnu.org/mozzarella instead of the official Mozilla 
add-ons repository. The add-ons provided by Mozzarella are very 
outdated. E.g: the Bitwarden extension is from 2023.

It is likely very wise to remove Mozzarella add-ons repository from the 
Guix package for Librewolf.

https://git.savannah.gnu.org/cgit/guix.git/tree/gnu/packages/librewolf.scm?id=5b4ae0b5c2d63e40c8adaf15d9ce0c456189f321#n530

Regards,
Snikta