tce-load -i compiletc autoconf2.13 cbindgen dbus-glib-dev gtk3-dev gtk2-dev libnotify-dev node.js-dev nss-dev libasound-dev alsa alsa-utils startup-notification-dev zip unzip icu-dev libevent-dev libwebp-dev clang llvm-dev libXt-dev curl-dev

https://archive.mozilla.org/pub/firefox/releases/78.1.0esr/source/firefox-78.1.0esr.source.tar.xz

cd firefox-78.1.0

cp mozconfig ./

sed -i -e 's/Disable/Enable/' -e '/^MOZ_REQUIRE_SIGNING/s/0/1/' build/mozconfig.common

sudo ln -s /tmp/tcloop/nss-dev/usr/local/include/nss/* /usr/local/include

export CC="gcc" CXX="g++"
export MOZBUILD_STATE_PATH=${PWD}/mozbuild
./mach build [8h +/-]

sudo ./mach install

sudo mkdir -pv  /usr/local/lib/mozilla/plugins
sudo ln -sf ../../mozilla/plugins /usr/local/lib/firefox/browser/