Solution
NI highly recommends that customers use the supported browser (Internet Explorer).
Previously, other browsers were able to display Remote Front Panels by utilizing a browser plugin mechanism called Netscape Plugin Application Programming Interface (NPAPI). This plugin mechanism was
deprecated from Google Chrome beginning in version 42,
Mozilla Firefox beginning in version 52, and
Safari 12.1 in macOS Mojave 10.14.
As such, Google Chrome version 42 and later, Mozilla Firefox 52 and later, Safari 12.1 in macOS Mojave 10.14, and Microsoft Edge are
not supported browsers for these older NI web technologies.