I've upgraded from 17.10 to 18.04 and was hoping to have better emoji support. The results are that Chrome (66) is still using the old black and white emoji font, and Firefox (59) is managing to show some color emoji but not others. I took some advice to install the font EmojiOne but that didn't seem to help
Screenshots from the emoji demo page at http://eosrei.github.io/emojione-color-font/full-demo.html :
sudo apt-get install --reinstall fonts-noto-color-emoji
Whatever method any of you use, It is required to restart your browsers after reinstall of fonts package. Firefox and Chrome Emojis are back!
– user3789797 Jan 25 '20 at 20:50