--- a/browser/base/content/test/static/browser_all_files_referenced.js
+++ b/browser/base/content/test/static/browser_all_files_referenced.js
@@ -92,16 +92,19 @@ var whitelist = [
 
   // toolkit/components/places/ColorAnalyzer_worker.js
   {file: "resource://gre/modules/ClusterLib.js"},
   {file: "resource://gre/modules/ColorConversion.js"},
 
   // Needed by HiddenFrame.jsm, but can't be packaged test-only
   {file: "chrome://global/content/win.xul"},
 
+  // List of built-in locales. See bug 1362617 for details.
+  {file: "resource://gre/res/multilocale.json"},
+
   // The l10n build system can't package string files only for some platforms.
   {file: "resource://gre/chrome/en-US/locale/en-US/global-platform/mac/accessible.properties",
    platforms: ["linux", "win"]},
   {file: "resource://gre/chrome/en-US/locale/en-US/global-platform/mac/intl.properties",
    platforms: ["linux", "win"]},
   {file: "resource://gre/chrome/en-US/locale/en-US/global-platform/mac/platformKeys.properties",
    platforms: ["linux", "win"]},
   {file: "resource://gre/chrome/en-US/locale/en-US/global-platform/unix/accessible.properties",

--- a/browser/installer/Makefile.in
+++ b/browser/installer/Makefile.in
@@ -7,16 +7,19 @@ DIST_SUBDIR := browser
 
 include $(topsrcdir)/config/rules.mk
 
 MOZ_PKG_REMOVALS = $(srcdir)/removed-files.in
 
 MOZ_PKG_MANIFEST = $(srcdir)/package-manifest.in
 MOZ_PKG_DUPEFLAGS = -f $(srcdir)/allowed-dupes.mn
 
+DEFINES += -DPKG_LOCALE_MANIFEST=$(topobjdir)/browser/installer/locale-manifest.in
+MOZ_CHROME_LOCALE_ENTRIES=@RESPATH@/browser/chrome/ @RESPATH@/chrome/
+
 # Some files have been already bundled with xulrunner
 ifndef MOZ_MULET
 MOZ_PKG_FATAL_WARNINGS = 1
 else
 DEFINES += -DMOZ_MULET
 endif
 
 # When packaging an artifact build not all xpt files expected by the

--- a/browser/installer/package-manifest.in
+++ b/browser/installer/package-manifest.in
@@ -40,20 +40,16 @@
 #endif
 @APPNAME@/Contents/PkgInfo
 @RESPATH@/firefox.icns
 @RESPATH@/document.icns
 @RESPATH@/@LPROJ_ROOT@.lproj/*
 #endif
 
 [@AB_CD@]
-@RESPATH@/browser/chrome/@AB_CD@@JAREXT@
-@RESPATH@/browser/chrome/@AB_CD@.manifest
-@RESPATH@/chrome/@AB_CD@@JAREXT@
-@RESPATH@/chrome/@AB_CD@.manifest
 @RESPATH@/dictionaries/*
 #if defined(XP_WIN) || defined(XP_LINUX)
 @RESPATH@/fonts/*
 #endif
 @RESPATH@/hyphenation/*
 @RESPATH@/browser/@PREF_DIR@/firefox-l10n.js
 #ifdef HAVE_MAKENSISU
 @BINPATH@/uninstall/helper.exe
@@ -845,8 +841,12 @@ bin/libfreebl_32int64_3.so
 @RESPATH@/components/backgroundhangmonitor.xpt
 
 ; NOTE: This must match the config checks in
 ; /toolkit/components/backgroundhangmonitor/moz.build.
 #if defined(NIGHTLY_BUILD) && !defined(MOZ_DEBUG) && !defined(MOZ_TSAN)
 @RESPATH@/components/BHRTelemetryService.js
 @RESPATH@/components/BHRTelemetryService.manifest
 #endif
+
+#ifdef PKG_LOCALE_MANIFEST
+#include @PKG_LOCALE_MANIFEST@
+#endif

--- a/mobile/android/installer/Makefile.in
+++ b/mobile/android/installer/Makefile.in
@@ -14,21 +14,18 @@ endif
 
 include $(topsrcdir)/config/rules.mk
 
 MOZ_PKG_REMOVALS = $(srcdir)/removed-files.in
 
 MOZ_PKG_MANIFEST = $(srcdir)/package-manifest.in
 MOZ_PKG_DUPEFLAGS = -f $(srcdir)/allowed-dupes.mn
 
-ifdef MOZ_CHROME_MULTILOCALE
-MOZ_PKG_MANIFEST_DEPS = locale-manifest.in
-
-DEFINES += -DPKG_LOCALE_MANIFEST=$(CURDIR)/locale-manifest.in
-endif
+DEFINES += -DPKG_LOCALE_MANIFEST=$(topobjdir)/mobile/android/installer/locale-manifest.in
+MOZ_CHROME_LOCALE_ENTRIES=@BINPATH@/chrome/
 
 DEFINES += \
   -DMOZ_APP_NAME=$(MOZ_APP_NAME) \
   -DPREF_DIR=$(PREF_DIR) \
   -DJAREXT= \
   -DMOZ_CHILD_PROCESS_NAME=$(MOZ_CHILD_PROCESS_NAME) \
   -DMOZ_CHILD_PROCESS_NAME_PIE=$(MOZ_CHILD_PROCESS_NAME_PIE) \
   -DANDROID_CPU_ARCH=$(ANDROID_CPU_ARCH) \
@@ -79,27 +76,8 @@ else
 # Every other platform just winds up in dist/bin
 BINPATH = bin
 endif
 DEFINES += -DBINPATH=$(BINPATH)
 
 ifdef ENABLE_MARIONETTE
 DEFINES += -DENABLE_MARIONETTE=1
 endif
-
-
-ifdef MOZ_CHROME_MULTILOCALE
-# When MOZ_CHROME_MULTILOCALE is defined, we write multilocale.json like:
-# {"locales": ["en-US", "de", "ar", ...]}
-locale-manifest.in: $(GLOBAL_DEPS) FORCE
-	printf '\n[multilocale]\n' > $@
-	printf '@BINPATH@/res/multilocale.json\n' >> $@
-	for LOCALE in en-US $(MOZ_CHROME_MULTILOCALE) ;\
-	do \
-	  printf '$(BINPATH)/chrome/'"$$LOCALE"'$(JAREXT)\n' >> $@; \
-	  printf '$(BINPATH)/chrome/'"$$LOCALE"'.manifest\n' >> $@; \
-	done
-	COMMA=,
-	echo '{"locales": [$(foreach l,$(MOZ_CHROME_MULTILOCALE),"$(l)"$(COMMA)) "en-US"]}' \
-	  > $(FINAL_TARGET)/res/multilocale.json
-
-GARBAGE += locale-manifest.in
-endif

--- a/mobile/android/installer/package-manifest.in
+++ b/mobile/android/installer/package-manifest.in
@@ -10,18 +10,16 @@
 ; - in front of a file specifies it to be removed from the destination
 ; * wildcard support to recursively copy the entire directory
 ; ; file comment
 ;
 
 #filter substitution
 
 [@AB_CD@]
-@BINPATH@/chrome/@AB_CD@@JAREXT@
-@BINPATH@/chrome/@AB_CD@.manifest
 @BINPATH@/@PREF_DIR@/mobile-l10n.js
 @BINPATH@/update.locale
 #ifdef MOZ_UPDATER
 @BINPATH@/updater.ini
 #endif
 @BINPATH@/dictionaries/*
 @BINPATH@/hyphenation/*
 

--- a/toolkit/locales/l10n.mk
+++ b/toolkit/locales/l10n.mk
@@ -208,17 +208,17 @@ endif
 	$(RM) -rf $(REAL_LOCALE_MERGEDIR)
 	-$(MOZILLA_DIR)/mach compare-locales --merge $(BASE_MERGE) $(srcdir)/l10n.toml $(L10NBASEDIR) $*
 
 langpack-%: LANGPACK_FILE=$(ABS_DIST)/$(PKG_LANGPACK_PATH)$(PKG_LANGPACK_BASENAME).xpi
 langpack-%: AB_CD=$*
 langpack-%: XPI_NAME=locale-$*
 langpack-%: IS_LANGUAGE_REPACK=1
 langpack-%: IS_LANGPACK=1
-langpack-%: libs-%
+langpack-%: multilocale.json-% libs-%
 	@echo 'Making langpack $(LANGPACK_FILE)'
 	$(NSINSTALL) -D $(DIST)/$(PKG_LANGPACK_PATH)
 	$(call py_action,langpack_manifest,--locales $(AB_CD) --min-app-ver $(MOZ_APP_VERSION) --max-app-ver $(MOZ_APP_MAXVERSION) --app-name "$(MOZ_APP_DISPLAYNAME)" --l10n-basedir "$(L10NBASEDIR)" --defines $(LANGPACK_DEFINES) --input $(DIST)/xpi-stage/locale-$(AB_CD))
 	$(call py_action,zip,-C $(DIST)/xpi-stage/locale-$(AB_CD) -x **/*.manifest -x **/*.js -x **/*.ini $(LANGPACK_FILE) $(PKG_ZIP_DIRS) manifest.json)
 
 # This variable is to allow the wget-en-US target to know which ftp server to download from
 ifndef EN_US_BINARY_URL 
 EN_US_BINARY_URL = $(error You must set EN_US_BINARY_URL)

--- a/toolkit/mozapps/installer/l10n-repack.py
+++ b/toolkit/mozapps/installer/l10n-repack.py
@@ -19,16 +19,17 @@ NON_CHROME = set([
     'dictionaries',
     'defaults/profile',
     'defaults/pref*/*-l10n.js',
     'update.locale',
     'updater.ini',
     'extensions/langpack-*@*',
     'distribution/extensions/langpack-*@*',
     'chrome/**/searchplugins/*.xml',
+    '**/multilocale.json'
 ])
 
 
 def valid_extra_l10n(arg):
     if '=' not in arg:
         raise ValueError('Invalid value')
     return tuple(arg.split('=', 1))
 

--- a/toolkit/mozapps/installer/packager.mk
+++ b/toolkit/mozapps/installer/packager.mk
@@ -27,17 +27,17 @@ ifdef MOZ_SIGN_PREPARED_PACKAGE_CMD
 	$(MOZ_SIGN_PREPARED_PACKAGE_CMD) $(DEPTH)/installer-stage && true
 endif
 
 export USE_ELF_HACK ELF_HACK_FLAGS
 
 # Override the value of OMNIJAR_NAME from config.status with the value
 # set earlier in this file.
 
-stage-package: $(MOZ_PKG_MANIFEST) $(MOZ_PKG_MANIFEST_DEPS)
+stage-package: multilocale.json locale-manifest.in $(MOZ_PKG_MANIFEST) $(MOZ_PKG_MANIFEST_DEPS)
 	OMNIJAR_NAME=$(OMNIJAR_NAME) \
 	NO_PKG_FILES="$(NO_PKG_FILES)" \
 	$(PYTHON) $(MOZILLA_DIR)/toolkit/mozapps/installer/packager.py $(DEFINES) $(ACDEFINES) \
 		--format $(MOZ_PACKAGER_FORMAT) \
 		$(addprefix --removals ,$(MOZ_PKG_REMOVALS)) \
 		$(if $(filter-out 0,$(MOZ_PKG_FATAL_WARNINGS)),,--ignore-errors) \
 		$(if $(MOZ_PACKAGER_MINIFY),--minify) \
 		$(if $(MOZ_PACKAGER_MINIFY_JS),--minify-js \
@@ -177,8 +177,52 @@ source-package:
 	(cd $(MOZ_PKG_SRCDIR) && $(CREATE_SOURCE_TAR) - ./ ) | xz -9e > $(SOURCE_TAR)
 
 hg-bundle:
 	$(MKDIR) -p $(DIST)/$(PKG_SRCPACK_PATH)
 	$(CREATE_HG_BUNDLE_CMD)
 
 source-upload:
 	$(MAKE) upload UPLOAD_FILES='$(SOURCE_UPLOAD_FILES)' CHECKSUM_FILE='$(SOURCE_CHECKSUM_FILE)'
+
+
+ALL_LOCALES = $(if $(filter en-US,$(LOCALES)),$(LOCALES),$(LOCALES) en-US)
+LOCALE_LIST = $(foreach l,$(ALL_LOCALES),"$(l)")
+
+# Firefox uses @RESPATH@.
+# Fennec uses @BINPATH@ and doesn't have the @RESPATH@ variable defined.
+ifeq ($(MOZ_BUILD_APP),mobile/android)
+BASE_PATH:=@BINPATH@
+MULTILOCALE_DIR = $(DIST)/$(BINPATH)/res
+else
+BASE_PATH:=@RESPATH@
+MULTILOCALE_DIR = $(DIST)/$(RESPATH)/res
+endif
+
+# This version of the target uses MOZ_CHROME_MULTILOCALE to build multilocale.json
+# and places it in dist/bin/res - it should be used when packaging a build.
+multilocale.json: LOCALES?=$(MOZ_CHROME_MULTILOCALE)
+multilocale.json:
+	@$(MKDIR) -p "$(MULTILOCALE_DIR)"
+	echo '{"locales": [$(subst $(SPACE),$(COMMA)$(SPACE),$(LOCALE_LIST))]}' \
+	  > $(MULTILOCALE_DIR)/multilocale.json
+
+# This version of the target uses AB_CD to build multilocale.json and places it
+# in the $(XPI_NAME)/res dir - it should be used when repackaging a build.
+multilocale.json-%: LOCALES?=$(AB_CD)
+multilocale.json-%: MULTILOCALE_DIR=$(DIST)/xpi-stage/$(XPI_NAME)/res
+multilocale.json-%:
+	@$(MKDIR) -p "$(MULTILOCALE_DIR)"
+	echo '{"locales": [$(subst $(SPACE),$(COMMA)$(SPACE),$(LOCALE_LIST))]}' \
+	  > $(MULTILOCALE_DIR)/multilocale.json
+
+locale-manifest.in: LOCALES?=$(MOZ_CHROME_MULTILOCALE)
+locale-manifest.in: $(GLOBAL_DEPS) FORCE
+	printf '\n[multilocale]\n' > $@
+	printf '$(BASE_PATH)/res/multilocale.json\n' >> $@
+	for LOCALE in $(ALL_LOCALES) ;\
+	do \
+	  for ENTRY in $(MOZ_CHROME_LOCALE_ENTRIES) ;\
+		do \
+		  printf "$$ENTRY""$$LOCALE"'@JAREXT@\n' >> $@; \
+		  printf "$$ENTRY""$$LOCALE"'.manifest\n' >> $@; \
+	  done \
+	done