.mozconfig

export CC="clang"
export CXX="clang++"
export CFLAGS="-fcolor-diagnostics"
export CXXFLAGS="-fcolor-diagnostics"

mk_add_options MOZ_OBJDIR=@TOPSRCDIR@/obj-firefox-release-b2g-desktop

mk_add_options AUTOCONF=autoconf213

ac_add_options --enable-application=b2g
ac_add_options --disable-libjpeg-turbo
ac_add_options --disable-replace-malloc

ac_add_options --disable-debug
ac_add_options --enable-optimize
ac_add_options --with-ccache

ENABLE_MARIONETTE=1

ac_add_options --disable-strip
ac_add_options --disable-install-strip

README.md

Prep

1. Create a new Git working directory so you can compile both Firefox and B2G desktop separately

• You could just clone gecko-dev again... but instead use new-workdir to share files and save space

2. In the new checkout, use the attached file as your .mozconfig
3. Running a simulator requires a Gaia profile, so clone it
4. In the Gaia checkout, place the attached custom-prefs.js and custom-settings.json in <GAIA_DIR>/build/config/
5. Build a Gaia profile with P=1 NOFTU=1 GAIA_APP_TARGET=production make profile

• This is a one time step, because Gaia does not contain DevTools server code

Development

1. In your new Gecko checkout, switch to the branch you are working on / apply your changes in some way
2. Run mach build

• This creates a b2g desktop build, which includes DevTools server code such as the actors

3. Run your b2g desktop build with mach run -profile <GAIA_DIR>/profile -start-debugger-server 6000

• You must use an absolute path to the profile, as it will fail otherwise

4. In WebIDE, connect via the Remote Runtime using localhost:6000
5. As you make more changes, close the b2g desktop window, and repeat steps 2 - 4

custom-prefs.js

user_pref("devtools.debugger.prompt-connection", false);
user_pref("devtools.debugger.forbid-certified-apps", false);
user_pref("browser.dom.window.dump.enabled", true);
user_pref("devtools.debugger.log", true);

custom-settings.json

{
  "debugger.remote-mode": "adb-devtools",
  "screen.timeout": 0,
  "lockscreen.enabled": false,
  "lockscreen.locked": false
}