Configuring Firefox Binary.path for Cucumber (Ubuntu)

env.rb

# Could not find Firefox binary (os=linux). Make sure Firefox is installed or set the path manually with Selenium::WebDriver::Firefox::Binary.path= (Selenium::WebDriver::Error::WebDriverError)

require 'selenium-webdriver'
Selenium::WebDriver::Firefox::Binary.path='/usr/bin/firefox/firefox-bin'

I haven't any env.rb file. Instead there is environment.rb file. BUt placing the above code there doesn't corrects my error.

Here I've posted the solution.
makandra/geordi#42 (comment)