Please use this instead, its better and is up to date

https://github.com/PhoenixAceVFX/RoValra/blob/main/FIREFOX_INSTALLATION.md

RoValra Firefox

Original RoValra Chrome Extension Repository: https://github.com/NotValra/RoValra

• Overall Progress: 96.43%

Known Issues

• Hidden Catalog N/A

If you find any issues or bugs please open an issue

This is an unofficial port of RoValra to firefox! This is NOT managed by Valra.