Noto Color Emoji is partially used
This comes from: https://bugs.launchpad.net/ubuntu/+source/fonts-noto-color-emoji/+bug/1770783
Also happening in Gentoo. In summary, with Google Chrome and Firefox, sometimes some emojis are shown with Noto Color Emoji while others are shown with the old B&W style.
For example you can see many examples simply looking to the comments of many youtube videos as people seems to like to use a lot of emojis on them and you can see some use Noto Color Emoji while others not: https://www.youtube.com/watch?v=gAirINwjaxE https://www.youtube.com/watch?v=bDb5QMRTCPI https://www.youtube.com/watch?v=bbEoRnaOIbs (and many other random examples)
Looking to "Inspect element" Firefox tool, in "Fonts" section, I see that "Dejavu Sans" is being used to show emojis instead of Noto Color Emoji. I have seen that current default /etc/fonts/conf.avail/60-generic.conf only sets Noto Color Emoji for emoji while, probably, it should also be listed for other "families" to be used over ugly emoji fonts from other font sets
Thanks