Firefox addon not reporting any users

It's unclear to me whether the Firefox addon is working correctly. I've gotten no usage out of it and have the following messages/errors in the console:

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://snowflake-broker.bamsoftware.com/proxy. (Reason: CORS request did not succeed).

ICE failed, add a STUN server and see about:webrtc for more details