Capybara patch to avoid `@browser.navigate.to('about:blank')` which hangs sometimes.

capybara_reset_patch.rb

# Monkey-patch on Capybara!!!
#
class Capybara::Selenium::Driver < Capybara::Driver::Base

  # Patch to avoid `@browser.navigate.to('about:blank')` which hangs sometimes.
  #
  def reset!
    # Use instance variable directly so we avoid starting the browser just to reset the session
    if @browser
      begin @browser.manage.delete_all_cookies
      rescue Selenium::WebDriver::Error::UnhandledError
        # delete_all_cookies fails when we've previously gone
        # to about:blank, so we rescue this error and do nothing
        # instead.
      end
      # about:blank is broken for this purpose. Use app's /ping
      @browser.navigate.to("#{Capybara.app_host}/ping")
    end
  end
end

Note the "#{Capybara.app_host}/ping" URL should be revised to use a page in your subject app.

This was applied successfully with Capybara 2.1.0