Connecting to Ubuntu SnapWeb; https://localhost:4201 shows Your connection is not secure

[Chris]

This is the first time I've noticed this happening and I keep SnapWeb
loaded in my browser.

The owner of localhost has configured their website improperly. To
protect your information from being stolen, Firefox has not connected
to this website.

localhost:4201 uses an invalid security certificate. The certificate is
not trusted because it is self-signed. The certificate is only valid
for 127.0.0.1

But, is the error caused by a setting I have not correct?

Chris

-- 
Chris
KeyID 0xE372A7DA98E6705C
31.11972; -97.90167 (Elev. 1092 ft)
19:21:04 up 4 days, 10:45, 1 user, load average: 0.73, 0.31, 0.20
Ubuntu 16.04.1 LTS, kernel 4.4.0-45-generic #66-Ubuntu SMP Wed Oct 19 14:12:37 UTC 2016
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