Comment 2 for bug 1644021

I believe EmojiOne Mozilla (and most proper emoji-containing fonts) have issues with being overridden by DejaVu's black and white glyphs.

So you see a weird mix of black and white glyphs (from DejaVu Sans and Mono and Serif etc) and full-color (from EmojiOne Mozilla) emojis.

I guess Ubuntu decided this was a problem, but now we have no full-color emojis at all.

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Further explanation copy and pasted from here:

https://github.com/eosrei/emojione-color-font#install-on-linux

"The default serif, sans-serif and monospace font for most Linux distributions is DejaVu. DejaVu includes a wide range of symbols which override the EmojiOne Color characters."