To use built-in VPN in Firefox, you need to sign in with a Mozilla account. How do I sign up for a Mozilla account? You can access the sign-up page on each Mozilla service, or visit the [https://accounts.firefox.com/signin Mozilla accounts signup page] and follow the steps below: * Enter your email address and click Sign up or sign in. * Enter a password and your age, then click Create account. * When the Mozilla accounts email arrives, enter the 6-digit confirmation code. * Once your account has been confirmed, sign in to your favorite Mozilla Service using your newly created account. After you sign up, you can also sign in and add an image to your profile. or Open Firefox and click the Menu and click on Sign in Click Create Account to be taken to the [https://accounts.firefox.com/signin Mozilla accounts signup page]. and then you can use built-in VPN in Firefox