how to use different version of firefox using webdriver?

Question

how to set Firefox version in web-driver? I just want to user different version of Firefox.

like different version 19, 20 , 21....

please provide a generic s

Answer 1

Finally i have found solution to run with different browser version

System.setProperty("webdriver.firefox.bin", "/Applications/Firefox-2.app/Contents/MacOS/firefox-bin");
    WebDriver driver = new FirefoxDriver();
    driver.get(baseUrl);
    System.out.println(driver.getTitle());
    driver.close();
    driver.quit();