I compiled FS 1.6 from source and using Verto Communicator with Firefox shows:

Firefox 44.0.2

-Works fine with Chrome (I tested Chrome successfully to confirm there is no network issues).

-Same error in 2 different networks.

It works only after I enter in Browser manually:

https://<IP>:8082 and accept the certificate

I'm using self-signed certificates. Is this Browser related or Application related?

Looks like is Browser related, need confirmation.

Console logs:

http://pastebin.com/XSJA9dZf

References:

https://bugzilla.mozilla.org/show_bug.cgi?id=594502