Times in Firefox 55 lack time zone

Tue Aug 8 16:46:27 UTC 2017

Starting with Firefox 55, I have noticed that times within the browser 
are showing in UTC only.

For example, this[1] page shows only UTC times in Firefox 55.  Firefox 
54 worked and Chromium 59 works as expected.  time(1) looks correct
    showing the time in EDT.

Anyone have ideas about this or can reproduce it?  The times on the 
HipChat server at work are throwing me off.  :)

Sean
   1. http://browserspy.dk/date.php
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