How can I switch to pop up facebook sign up page in Selenium?

Question

I am not able to switch to pop up facebook sign up page using selenium.Tried switch to method but still not working. FB Signup page

Tried below code

public void createNewAccount() {
    

    driver.findElement(By.linkText("Create new account")).click();
    
    for (String currentWindow: driver.getWindowHandles())
           driver.switchTo().window(currentWindow);

    driver.findElement(By.name("firstname")).sendKeys("Black");
    
    driver.findElement(By.name("lastname")).sendKeys("Beard");

But its not letting me to write any text in the textbo.