Завожу эмулятор на ARM

-rwxr-xr-x 1 root root    3498 Jun 30  2014 android*
-rwxr-xr-x 1 root root    3286 Jun 30  2014 ddms*
-rwxr-xr-x 1 root root    1940 Jun 30  2014 draw9patch*
-rwxr-xr-x 1 root root   33428 Sep  2 01:17 emulator*
-rwxr-xr-x 1 root root 2657128 Sep  2 01:17 emulator64-arm*
-rwxr-xr-x 1 root root 2693672 Sep  2 01:17 emulator64-mips*
-rwxr-xr-x 1 root root 2752360 Sep  2 01:17 emulator64-x86*
-rwxr-xr-x 1 root root 2546864 Sep  2 01:17 emulator-arm*
-rwxr-xr-x 1 root root 2525424 Sep  2 01:17 emulator-mips*
-rwxr-xr-x 1 root root 2646832 Sep  2 01:17 emulator-x86*

blitz@inode ..oid-device/moz-avd/mozemulator-4.3.avd % ls
total 5472147
drwxrwxr-x 2 blitz 100       3488 Nov 29 09:32 ./
drwxrwxr-x 3 blitz 100       3488 Oct 27 19:10 ../
-rw-r--r-- 1 blitz 100   69206016 Nov 29 09:30 cache.img
-rw-rw-r-- 1 blitz 100        676 Mar  9  2017 config.ini
-rw-rw-r-- 1 blitz 100         49 Nov 29 09:32 emulator-user.ini
-rw-r--r-- 1 blitz 100       1779 Nov 29 09:30 hardware-qemu.ini
-rwxrwxr-x 1 blitz 100    2407928 Mar  9  2017 kernel-qemu*
-rw-rw-r-- 1 blitz 100    2744320 Mar  9  2017 kernel-ranchu
-rw-rw-r-- 1 blitz 100     235257 Mar  9  2017 ramdisk.img
-rw-rw-r-- 1 blitz 100  629145600 Mar  9  2017 sdcard.img
-rw-rw-r-- 1 blitz 100  576716800 Mar  9  2017 system.img
-rw-rw-r-- 1 blitz 100 2147483648 Mar  9  2017 userdata.img
-rw------- 1 blitz 100  636485632 Nov 29 09:32 userdata-qemu.img
-rw------- 1 blitz 100 2147483648 Mar  9  2017 userdata-qemu.img.sav

mach

./mach bootstrap

# ./mach bootstrap

Please choose the version of Firefox you want to build:
1. Firefox for Desktop Artifact Mode
2. Firefox for Desktop
3. Firefox for Android Artifact Mode
4. Firefox for Android

Note on Artifact Mode:

Firefox for Desktop and Android supports a fast build mode called
artifact mode. Artifact mode downloads pre-built C++ components rather
than building them locally, trading bandwidth for time.

Artifact builds will be useful to many developers who are not working
with compiled code. If you want to work on look-and-feel of Firefox,
you want "Firefox for Desktop Artifact Mode".

Similarly, if you want to work on the look-and-feel of Firefox for Android,
you want "Firefox for Android Artifact Mode".

To work on the Gecko technology platform, you would need to opt to full,
non-artifact mode. Gecko is Mozilla's web rendering engine, similar to Edge,
Blink, and WebKit. Gecko is implemented in C++ and JavaScript. If you
want to work on web rendering, you want "Firefox for Desktop", or
"Firefox for Android".

If you don't know what you want, start with just Artifact Mode of the desired
platform. Your builds will be much shorter than if you build Gecko as well.
But don't worry! You can always switch configurations later.

You can learn more about Artifact mode builds at
https://developer.mozilla.org/en-US/docs/Artifact_builds.

Your choice:
4
Executing as root: dnf groupinstall "Development Tools" "Development Libraries" "GNOME Software Development"
Using metadata from Sun Jan  7 10:43:14 2018
Warning: Group 'Development Libraries' does not exist.
Dependencies resolved.
=======================================================================================================================================
 Group                                                    Packages
=======================================================================================================================================
Marking installed:
 Средства разработки
Продолжить? [y/N]: y
Выполнено!
Executing as root: dnf install autoconf213 mercurial curl-devel
Using metadata from Sun Jan  7 10:43:14 2018
Package autoconf213-2.13-31.el7.noarch is already installed, skipping.
Package autoconf213-2.13-31.el7.noarch is already installed, skipping.
Package autoconf213-2.13-31.el7.noarch is already installed, skipping.
Package mercurial-2.6.2-8.el7_4.x86_64 is already installed, skipping.
Package mercurial-2.6.2-8.el7_4.x86_64 is already installed, skipping.
Package mercurial-2.6.2-8.el7_4.x86_64 is already installed, skipping.
Package mercurial-2.6.2-8.el7_4.x86_64 is already installed, skipping.
Package mercurial-2.6.2-8.el7_4.x86_64 is already installed, skipping.
Package libcurl-devel-7.29.0-42.el7_4.1.x86_64 is already installed, skipping.
Dependencies resolved.
Nothing to do.
Error running mach:

    ['bootstrap']

The error occurred in code that was called by the mach command. This is either
a bug in the called code itself or in the way that mach is calling it.

You should consider filing a bug for this issue.

If filing a bug, please include the full output of mach, including this error
message.

The details of the failure are as follows:

NotImplementedError: Cannot bootstrap Firefox for Android: mozboot.base does not yet implement install_mobile_android_packages()

  File "/srv/unsaved/mozilla-arm_0011/firefox-52.5.2esr/python/mozboot/mozboot/mach_commands.py", line 26, in bootstrap
    bootstrapper.bootstrap()
  File "/srv/unsaved/mozilla-arm_0011/firefox-52.5.2esr/python/mozboot/mozboot/bootstrap.py", line 228, in bootstrap
    getattr(self.instance, 'install_%s_packages' % application)()
  File "/srv/unsaved/mozilla-arm_0011/firefox-52.5.2esr/python/mozboot/mozboot/centosfedora.py", line 94, in install_mobile_android_packages
    BaseBootstrapper.install_mobile_android_packages(self)
  File "/srv/unsaved/mozilla-arm_0011/firefox-52.5.2esr/python/mozboot/mozboot/base.py", line 156, in install_mobile_android_packages
    % __name__)

NotImplementedError: Cannot bootstrap Firefox for Android

-rw-r--r-- 1 blitz 100 249060924 Dec 22 13:05 firefox-58.0b12.source.tar.xz