Emoji in FreeBSD: Firefox, Thunderbird, and Chrome

Firefox and Thunderbird: They aren't there.
Chrome: They work.  See https://en.wikipedia.org/wiki/Emoji#In_Unicode

I have x11-fonts/noto-emoji installed.

When I install Chrome, the initial font settings are all "Custom,"
though once I select some other setting, "Custom" disappears from the
drop-down menu.  Regardless of that, emojis still operate as expected.
But in Firefox, even when I set all font setting to Noto, no emojis
appear; nor do they work in Thunderbird.

What else should I check?                                  -- George