fxos W: ELF file ('usr/bin/fxos') lacks FULL RELRO, check LDFLAGS.
fxos E: unknown is not a common license (it's not in /usr/share/licenses/common/)
fxos W: Unused shared library '/usr/lib/libm.so.6' by file ('usr/bin/fxos')
fxos W: Dependency included and not needed ('cmake')
fxos W: Dependency included and not needed ('flex')