Weird artifacts - compatibility issue?

Hello,
I get very weird and almost phycedaelic artifacts when loading the main weather page. Any ideas what can cause this or how to fix this?
Kind regards,

Hello, what browser are you using? I have never seen this.

Just a stock version of Firefox. It works fine on Firefox Android.

What version of Firefox do you have (latest os something older) and on which OS (Windows, Linux, Mac)?

Do you have the problem only with the temperature layer, or with all of them?