@Suty I have this problem on Firefox 150.0.1 as of today, 30th April 2026. My entire web page area for Windy is just a grey field with the Windy.com logo only at the top (see screenshot).
Windy is OK on Vivaldi and in the iPhone app, so it's the browser and not the website. Anything that might block it on FF is turned off.
I'm running W11 25H2 Pro.