While attempting to convert a timestamp into various time zones, I discovered that some TimeZones are not supported in Chrome (v76.0.38) but work well in Mozilla (v68.0.2).
let d = new Date(1567083463);
let n = d.toLocaleString('en-GB', { timeZone: "US/Arizona" });
An error occurs with message - Uncaught RangeError: Invalid time zone specified: US/Arizona
This error is observed in various other timezones as well:
US/Alaska
US/Mountain
US/Central
US/East-Indiana