Open browser window on failed scenarios of behat2

If you add two lines below to Behat\MinkExtension\Extension: in behat.yml file, it will open browser window on failed scenarios. Try with symfony2 as default_session.

Settings

show_cmd: 'open %s'
show_auto: true
#show_cmd: 'firefox %s'
#show_cmd: 'google-chrome %s'
#show_cmd: 'chromium-browser %s'