import org.openqa.selenium.By;
import org.openqa.selenium.Keys;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.openqa.selenium.firefox.FirefoxOptions;
import org.openqa.selenium.firefox.FirefoxProfile;
import org.openqa.selenium.firefox.internal.ProfilesIni;

public class Test {

    public static void main(String[] args) {
        ProfilesIni prof = new ProfilesIni();
        FirefoxProfile profile= prof.getProfile ("default");
        profile.setAcceptUntrustedCertificates(true) ;
        profile.setAssumeUntrustedCertificateIssuer(false);

        FirefoxOptions options = new FirefoxOptions();
        options.setProfile(profile);
        FirefoxDriver browser = new FirefoxDriver(options);

        browser.get("https://www.google.com");
        browser.findElement(By.xpath("//body")).sendKeys(Keys.chord(Keys.CONTROL, "t"));
    }
}