No Unwanted Polyfill.io
Prevent duplicate polyfills from Polyfill.io.
You are using polyfills from Polyfill.io and including polyfills already shipped with Next.js. This unnecessarily increases page weight which can affect loading performance.
Remove all duplicate polyfills. If you need to add polyfills but are not sure if Next.js already includes it, take a look at the list of supported browsers and features.