Mozilla tidbits.txt

To enable the crash reporter on local builds:
export MOZ_CRASHREPORTER=1 and re-run mach config to pick up the change

adb logcat -s "GeckoMemoryMonitor"
adb shell am broadcast -a org.mozilla.gecko.FORCE_MEMORY_PRESSURE
adb shell am force-stop org.mozilla.fennec_jan
adb shell am kill org.mozilla.fennec_jan
adb shell am start -n org.mozilla.fennec_aurora/.App -a android.intent.action.VIEW --es args '-profile /sdcard/tests/tmpwuju6s.mozrunner'

function dump(a) {
  Services.console.logStringMessage(a);
}

Busy sleep in JS:
log("sleeping 20 s");
this._sleep(20000);
log("returned from sleep");

_sleep: function sleepFor(sleepDuration) {
  var now = new Date().getTime();
  while(new Date().getTime() < now + sleepDuration){ /* do nothing */ }
}

/* import-globals-from head.js */

Fuzzy hg import
hg import --config ui.patch="patch --merge" fuzzy.patch

./mach build && ./mach package && ./mach gradle clean app:assembleWithGeckoBinariesDebug
./mach build && ./mach package && ./mach gradle app:assembleWithGeckoBinariesDebug
./mach gradle app:assembleWithGeckoBinariesDebug
./mach gradle app:installWithGeckoBinariesDebug

Rebuild Robocop:
./mach gradle app:assembleWithGeckoBinariesDebugAndroidTest
./mach gradle app:installWithGeckoBinariesDebugAndroidTest

Geckoview Test:
./mach gradle geckoview:installWithGeckoBinariesDebugAndroidTest
./mach geckoview-junit org.mozilla.geckoview.test.ContentDelegateTest#saveAndRestoreState

API Lint:
./mach gradle apiLintWithGeckoBinariesDebug
./mach gradle apiUpdateFileWithGeckoBinariesDebug
./mach gradle apiChangelogCheckWithGeckoBinariesDebug

General lint (now including Android):
./mach lint --outgoing

Fix package errors in dist/bin:
rm -rf dist/bin && ./mach build && ./mach package

Strg + Alt + Shift + I: bring up inspections in Android Studio (e.g. unused resources)

Profiling startup:
adb shell am start -n org.mozilla.fennec_aurora/.App --es env0 MOZ_PROFILER_STARTUP=1 --es env1 MOZ_PROFILER_SHUTDOWN=/storage/emulated/0/profile.json
If it looks like the buffer is not large enough, you can tweak the buffer size with the env var MOZ_PROFILER_STARTUP_ENTRIES.
This defaults to 1000000, which is 9MB. If you want 90MB use 10000000, and 20000000 for 180MB, which are good values to debug long startups.
or https://github.com/snorp/fennec-profiler-addon

DumpJSStack()
extern JS_FRIEND_API bool DumpPC(JSContext* cx);
extern JS_FRIEND_API bool DumpScript(JSContext* cx, JSScript* scriptArg);

export DEBUG_FRAME_DUMP=1
MOZ_LOG=frame:5
$someFrame->PresContext()->GetPresShell()->GetRootFrame()->List(stderr, 0, 0)
Layout Debugger: ./mach run -layoutdebug
#define BLABLA_LOG(...) printf_stderr("BLABLA: " __VA_ARGS__)

devtools.debugger.new-debugger-frontend
user_pref("browser.tabs.remote.force-disable", false);
export MOZ_FORCE_DISABLE_E10S=92.0a1 (= current version)
unset MOZ_FORCE_DISABLE_E10S

launch custom tab:
--esn android.support.customtabs.extra.SESSION -a android.intent.action.VIEW -d http://www.buttercookie.de

Logging:
export MOZ_LOG=MediaDemuxer:5,MediaResourceIndex:5,MediaCache:5
export MOZ_LOG_FILE="D:\Users\Jan\Documents\Mozilla\skip\MP3.log"

alternatively redirect output from stderr to file, e.g.
mach run > run.log 2>&1

GDB:
Ctrl + C = break
continue / c
step / s = single step
next / = step over
break <file:line or functionname> = set breakpoint
bt = backtrace calling stack
print <variable name>

LLDB:
pro hand -p true -s false SIGBUS = ignore signal

Python:
import pdb; pdb.set_trace()

HG alias for empty commit
[alias] empty = !touch tmp ; $HG add tmp ; $HG commit tmp -m "<enter commit message>" ; $HG rm tmp ; $HG commit tmp --amend "$@"
on Windows:
empty = !touch tmp && hg add tmp && hg commit tmp -m "<enter commit message>" && hg rm tmp && hg commit tmp --amend "$@"

Change commit author
hg ci --amend --user "My Name <mymail@example.org>" -X "**"
hg ci --amend --user "André Bargull <andre.bargull@gmail.com>" -X "**"

Import from Phabricator:
hg phabread <last revision in stack> --stack | hg import -

Redirect output for faster builds
./mach build > build.log 2>&1

Set alternative mozconfig
export MOZCONFIG=/absolute/path/to/mozconfig

Update rust:
rustup update
cargo install --force sccache
cargo install --force cbindgen

Update Mozilla clang:
./mach artifact toolchain --from-build linux64-clang && rm -rf ~/.mozbuild/clang && mv clang ~/.mozbuild/clang
./mach artifact toolchain --from-build linux64-clang-tidy && rm -rf ~/.mozbuild/clang-tools/clang-tidy && mv clang ~/.mozbuild/clang-tools/clang-tidy
./mach artifact toolchain --from-build win64-clang && rm -rf ~/.mozbuild/clang  && mv clang ~/.mozbuild/clang

Screenshot via adb:
adb shell screencap -p | sed 's/\r$//' > screen.png
adb shell screencap -p | perl -pe 's/\x0D\x0A/\x0A/g' > screen.png
adb exec-out screencap -p > screen.png

android.os.Debug.waitForDebugger();

adb shell dumpsys meminfo <your proc name>

Enable Desktop remote debugging:
Shift + F2 for developer console, then "listen <port>"

./mach mochitest-browser --jsdebugger <my-test(s)>

layout.word_select.stop_at_underscore

GeckoConsole|GeckoSession|GeckoBrowser:

root shell:
sudo -s

disk space:
df -h
sudo -i; baobab

Reclaim empty virtual disk space:
e4defrag /dev/sda1
dd if=/dev/zero of=wipefile bs=1024x1024; rm wipefile
Compact disk in VMWare

After expanding the VMWare disk, resizing the partition works via gparted
first swapoff, then move swap partition, then expand main partition in a separate step, otherwise gparted will force 1 MB of unallocated space between the two partitions

Desktop UI missing:
"kill -9 -1" to get back to login screen
either clear ~/.cache/compizconfig-1, or copy it from a fresh user

curl -s --compressed -G -d "format=text" --url "https://android.googlesource.com/platform/prebuilts/maven_repo/android/+/master/com/android/support/support-v4/24.0.0/support-v4-24.0.0-sources.jar" | base64 -d > support-v4-24.0.0-sources.jar

Block PWA button with uBlock:
*$csp=manifest-src 'none'

Google Safebrowsing/Mozilla Geolocation API keys are hidden in resource://gre/components/nsURLFormatter.js
(later Firefox versions might have the keys in AppConstants.jsm?)

FX Accounts:
https://accounts.firefox.com/?context=fx_desktop_v3&entrypoint=preferences&action=email&service=sync
https://accounts.firefox.com/signin?context=fx_desktop_v3&entrypoint=preferences&action=email&service=sync
https://accounts.firefox.com/?context=fx_fennec_v1&entrypoint=fxa%3Aenter_email&service=sync&action=email

https://hg.mozilla.org/mozilla-central/log?rev=sort%28%28file%28%27mobile%2F%2A%2A%27%29%20or%20file%28%27widget%2Fandroid%2F%2A%2A%27%29%20or%20file%28%27build.gradle%27%29%20or%20keyword%28Android%29%20or%20keyword%28mobile%29%29%20and%20not%20merge%28%29%2C%20rev%29&revcount=100