Hi, Apologies in advance for the lengthy response.
I have been working on color emoji support for Ubuntu and Debian. For simplicity's sake, I'll refer to this as the GNOME feature although it's more of a gtk3 feature I guess. The GNOME feature requires fontconfig 2.12.6 (in DELAYED/5) and a suitable font (like fonts-noto-color-emoji in the NEW queue) [1] EmojiOneMozilla.ttf is not in the right format for use by the GNOME feature. As far as I can tell, it's really only useful in Debian for Firefox and Thunderbird (or maybe something else built on top of Mozilla). Therefore, I don't really see any practical benefit to moving the font to /usr/share/fonts/. Someone could package https://github.com/mozilla/emojione-colr but it requires at least (node-)grunt-webfont which hasn't been packaged in Debian yet. Notably, the latest versions of the upstream Emoji One font (not the build used by Mozilla) are only available under a license which forbids modification and redistribution. Emoji One 2.2.7 is the final freely licensed version and can be used for the GNOME feature (in fact, it's the default included in Fedora 27). I'm a bit hesitant to work on packaging it because it's unmaintained and requires several NEW nodejs packages to really build it from source instead of using a pre-compiled ttf. There is a fork named Emoji Two which is slowly getting new emoji added. Unfortunately, nobody has supplied a build system for Emoji Two to produce the fonts we need. For the GNOME feature, it was suggested that it could maybe be adapted to use the nototools system used by fonts-noto-color-emoji. In that case, we wouldn't need to worry about any NEW nodejs packages. Also, Mozilla hasn't switched to Emoji Two yet either. Firefox doesn't (yet?) support the GNOME feature for color emoji fonts. So you would need 2 versions of Emoji One / Emoji Two, one for Mozilla, one for GNOME. Let me try to come to a conclusion: 1) Someone could package Mozilla's emojione-color, but its only known use is for Firefox and Thunderbird. 2) The Firefox package could add a NEW binary package containing the Mozilla font with a symlink to the thunderbird directory so that thunderbird could depend on the new package. Since Thunderbird's release schedule lags behind Firefox's a bit, it's possible that a Firefox update would update the font in a way that wouldn't be compatible with Thunderbird. Maybe I'm just imagining problems here, but the file duplication issue seems so minimal to me, that I'm not sure this is all that urgent either. [1] https://community.ubuntu.com/t/try-color-emoji-in-18-04/1492 Thanks, Jeremy Bicha
