Can I save my masterpassword in my browser or should I avoid this?

Indeed, your Master Password should never be stored anywhere except in your mind and on your printed https://support.1password.com/emergency-kit/ .

Your Master Password is the only password you need to memorize, which is why we're called 1Password (one-password) ;)
If you're having a hard time remembering or typing it, consider changing it to a strong memorable password: https://1password.com/password-generator/?type=memorable