Applying theme breaks Firefox's new tab

Hello!

I noticed a small bug when applying Catppuccino Mocha with the .sh installer. After applying it, the new tab in Firefox is empty, showing no search bar, no wallpaper, nor forecast widget.
I got that fixed by wiping Firefox's config files.

Currently on:
- CachyOS x86_64
- KDE Plasma 6.5.5
- Wayland 1.24.0-1.1

Thanks for your time!