gn : GN is a meta-build system that generates build files for Ninja ( https://gn.googlesource.com/ )
gnrt : Generate GN build rules for Chromium Rust dependencies ( https://chromium.googlesource.com/chromium/src/+/main/tools/crates/gnrt/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a FireBurn
For Paludis use this rsync : rsync://gentoo.zugaina.org/FireBurn-portage
If you have a problem : ycarus(-at-)zugaina.org