If you are using internal IPs e.g. 192.168.0.300 etc for development, you are likely to encounter this error when dealing with media devices.

Assuming that you are not using localhost for development for a reason, you can do either of the following

1. In Firefox you can enable the following two options described in https://stackoverflow.com/a/66605018/1805129. Go to about:config
   set to true media.devices.insecure.enabled and media.getusermedia.insecure.enabled