public FirefoxWebDriverUpdater(IHttpWebRequestFactory webRequestFactory, IWebDriverInfoCache cache) :
     base(webRequestFactory, cache)
 {
     this.webRequestFactory = webRequestFactory;
 }
 protected WebDriverUpdaterBase(IHttpWebRequestFactory webRequestFactory, IWebDriverInfoCache cache) :
     this(webRequestFactory) {
     this.cache = cache;
 }