My SSR website shows a flash of unstyled content ONLY on FF, I think it's a bug with FF
As you can see on this page https://economy.id.com.au/monash/population?WebID=10
FF renders the page with a FOUC (more evident when you open the devtools)
This is a server side rendered page built with Next.js
What makes me think it's a bug is when you examin the response from the call to the document you can see the page is properly rendered but for some weird reason FF still redraws the page with a FOUC.
Any help appreciated! (check screengrab attached)