Repro on slow Selenium proxy for HTTPS pages

TestProxy.java

package tests;

import junit.framework.TestCase;
import org.openqa.selenium.*;
import org.openqa.selenium.firefox.*;
import org.openqa.selenium.remote.*;

import java.util.concurrent.TimeUnit;

public class ProxyTest extends TestCase {
    private WebDriver driver;

    public void setUp() throws Exception {

    	String PROXY = "localhost:4444";

    	org.openqa.selenium.Proxy proxy = new org.openqa.selenium.Proxy();
    	proxy.setHttpProxy(PROXY)
    	     .setFtpProxy(PROXY)
    	     .setSslProxy(PROXY);
        DesiredCapabilities cap = DesiredCapabilities.firefox();
    	cap.setCapability(CapabilityType.PROXY, proxy);

        this.driver = new FirefoxDriver(cap);
        driver.manage().timeouts().implicitlyWait(30, TimeUnit.SECONDS);
    }

    public void proxyTest() throws Exception {
        this.driver.get("https://saucelabs.com/test/guinea-pig");
        assertEquals("I am a page title - Sauce Labs",
                     this.driver.getTitle());
    }

    public void tearDown() throws Exception {
        this.driver.quit();
    }
}