CAMA and mirophone
Face book messenger says Couldn't connect to your camera or microphone Your camera or microphone are either not connected or not supported. For troubleshooting suggestions, and information on supported browsers, visit our Help can not get answers rather talk to person
Wšě wotmołwy (3)
After you check your Windows Settings -
How to manage your camera and microphone permissions with Firefox https://support.mozilla.org/en-US/kb/how-manage-your-camera-and-microphone-permissions
Also, there are test sites like Online MicTest where you can ensure things are working properly.
See e.g.: