Hey Anita,
You can save new logins in 1Password X right from your browser. You can find the instructions here: https://support.1password.com/getting-started-1password-x/

1Password X works directly with our cloud service, which not all users have. That is why we still have and support for the good old companion extension, so all users can keep using 1Password and enjoy it :)

If you have any further questions please feel free to email us at support+extensions@1password.com.