I have done a Web Viewer in a Popover button that display a Google Map just the way FMP let us do it simply.
It's working great in FMP connected to the server.
When I open the same Web Viewer in Web Direct, Google Map is not displayed, but an error message saying
"This content cannot be displayed in a frame..." (see image, sorry french language)
I'm using FMPA and FMS latest release 15.