I have this game called Beacon Run that I created in Unity. It's been uploaded since mid 24, and it used to run fine for me on Firefox. Today I tried running it on Firefox to show it to someone, and it runs, but shows a black screen. all music and mouse cues still work but no visual.  I tried running it on chrome, it works fine.  I tried running games from other itch creators in Firefox, same black screen.

Why is this happening and how can I solve it?