This is a repeat of this problem posted a year ago.
Trying to launch FireDragon in the console gives
XPCOMGlueLoad error for file /usr/lib/firedragon/libxul.so:
libicui18n.so.71: cannot open shared object file: No such file or directory
Couldn't load XPCOM.
This does not solve it
sudo pacman -Syu firedragon
Looks like this is the case again, thus I'm bringing it to your attention
This one is waiting for a rebuild still