[Guide] Ripping models from Sketchfab

Hey guys, i've been using sketchfab ripper for a while and it has always worked great. I used to just download the texture files from the network inspector so i never used the ninjaripper tool for textures ( i could never get it to work properly) . recently Sketchfab no longer has the pngs in the network inspector, so im trying to use ninjaripper now.

The issue im facing is that version of firefox will not "play" the 3d models so that i can download the textures. Anyone know whats the issue there?

Thanks!