LRL Distributors
To be able to use behave in Ubuntu you must download the latest version of Firefox Browser.
sudo apt-get update
sudo apt-get install firefox
Then download Geckodriver and unpack it wherever you want.
https://github.com/mozilla/geckodriver/releases/download/v0.20.1/geckodriver-v0.20.1-linux64.tar.gz
Then add geckodriver to the path:
export PATH:$PATH:/your/path/to/geckodriver