Se voce quer navegar com o selenium com o seu firefox esse drive devera ser instalado

pip install selenium

1. Download geckodriver
2. Copia o executavel geckodriver para o diretorio /usr/local/bin

[1] – https://selenium-python.readthedocs.io/installation.html

[2] – https://stackoverflow.com/questions/40208051/selenium-using-python-geckodriver-executable-needs-to-be-in-path