Firefox Desktop - Elementary

Firefox

python -c 'import platform; print(platform.linux_distribution())'
('"elementary"', '0.4', 'loki')

/mozilla-central/python/mozboot/mozboot/bootstrap.py

DEBIAN_DISTROS = (
    'Debian',
    'debian',
    'Ubuntu',
    # Most Linux Mint editions are based on Ubuntu. One is based on Debian.
    # The difference is reported in dist_id from platform.linux_distribution.
    # But it doesn't matter since we share a bootstrapper between Debian and
    # Ubuntu.
    'Mint',
    'LinuxMint',
    'Elementary OS',
    'Elementary',
    '"elementary OS"',
    '"elementary"',
)

./match bootstrap

=)
info: downloading component 'rustc'

Your system should be ready to build Firefox for Desktop!