google-chrome-stable

# Add Key:
wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | sudo apt-key add - 

# Set repository:

sudo sh -c 'echo "deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main" >> /etc/apt/sources.list.d/google-chrome.list'

# Install package:

sudo apt-get update 
sudo apt-get install google-chrome-stable

install_chrome_driver

sudo apt-get install chromium-chromedriver
sudo ln -s /usr/lib/chromium-browser/chromedriver /usr/bin/chromedriver

PPA firefox

sudo add-apt-repository ppa:ubuntu-mozilla-daily/firefox-aurora
sudo apt-get update
sudo apt-get install firefox

watir-webdriver

gem install 'watir-webdriver'
gem install 'selenium-webdriver'

wget https://github.com/mozilla/geckodriver/releases/download/v0.13.0/geckodriver-v0.13.0-linux64.tar.gz
tar -xvzf geckodriver-v0.13.0-linux64.tar.gz

chmod +x geckodriver
cp geckodriver wires
sudo cp geckodriver /usr/local/bin

# export PATH=$PATH:/root/bin/wires
# export PATH=$PATH:/root/bin/geckodriver

xvfb

# http://stackoverflow.com/questions/11494994/is-it-possible-to-plug-a-javascript-engine-with-ruby-and-nokogiri

sudo apt-get install xvfb firefox

gem install watir-webdriver headless

require 'rubygems'
require 'watir-webdriver'
require 'headless'

headless = Headless.new
headless.start
browser = Watir::Browser.new

browser.goto 'http://jsbin.com/ivihur' # our example
el = browser.element :css => '#hello'
puts el.text

browser.close
headless.destroy