I want to change this field label from "First and last name" to "Display Name". The documentation implies it's not possible but maybe I missed something. https://github.com/firebase/firebaseui-web#customizing-firebaseui-for-authentication
If I can't change it I'll just remove it altogether via
requireDisplayName: false

If you are including firebaseui.js from your local server NOT CDN server (ie. <script src="./dist/firebaseui.js"></script>) than you may edit the local js file 
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