Add smart card support to general browser

Hi

After another Windows bug that nearly made all work file gone, I finally convinced my mother to switch to Linux on her work laptop. I wanted to install Aurora, but there is a problem: she uses smart cards for accessing italian public administration websites. I saw a thread here that talked about passing the card reader to a browser (Firefox, but can also be Chrome): Smartcard access for native Firefox - #5 by m2Giles

I tested this afternoon, but even after following that guide, Floorp (Firefox-based) says “impossible to load module”, even by passing the module by hand. Do you have any suggestions?

Floorp is flatpak package, and I passed xdg-run/p11-kit/pkcs11 to custom files