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

Just specify the path to the binary of the version..may be, like-

FirefoxBinary binary = new FirefoxBinary(new File("path_to_bin"));
FirefoxProfile profile = new FirefoxProfile();
WebDriver driver = new FirefoxDriver(binary, profile);