Firefox issue

1. Selenium 3.0以上需要geckodriver

• 下载最新的geckodriver版本：Latest geckodriver
• 如果是tar.gz格式的包，先进行解压：tar -xzvf geckodriver.gz
• 移置/usr/local/share/目录下，mv -f geckodriver /usr/local/share/geckodriver
• 软连接：ln -s /usr/loca/share/geckodriver /usr/local/bin/geckodriver and ln -s /usr/local/share/geckodriver /usr/bin/geckodriver

Chrome issue

2. Selenium 需要chromedriver

• 下载最新的chromedriver版本：Latest chromedriver
• 如果是zip格式的包，先进行解压：unzip chromedriver.zip
• 移置/usr/local/share/目录下，mv -f chromedriver /usr/local/share/chromedriver
• 软连接：ln -s /usr/loca/share/chromedriver /usr/local/bin/chromedriver and ln -s /usr/local/share/chromedriver /usr/bin/chromedriver