I'm on macOS (10.14.6) and have OBS installed. I tried out the virtual cam a while ago using the native virtual cam functionality (not the plugin) and now whenever I need to use my camera in Firefox (88.0b5), it uses my virtual cam. This is the case whether OBS is open or not and whether my virtual cam is "started" or not. I can't get it to use my macbook's normal webcam or even tell that it exists.
There don't seem to be any preferences in OBS (26.1.2) about disabling the virtual camera. How can I disable that feature entirely or just get Firefox to use my normal webcam instead of the virtual cam?