How to open specific browser using selenium webdriver

Question

I am using lang :java framework: testNG

my system has 3-4 versions of Mozilla installed, how can i open instance of specific version of Mozilla. Suppose i have 3.5, 3.6,

Answer 1

For Ruby - Chrome

  caps = Selenium::WebDriver::Remote::Capabilities.chrome("desiredCapabilities" => "chromeOptions" => {"binary" => "/Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome"})
  @driver = Selenium::WebDriver.for :chrome, desired_capabilities: caps