diff --git a/toolkit/mozapps/installer/packager.mk b/toolkit/mozapps/installer/packager.mk
index 8f51bb5faffa..f6cfbed8152a 100644
--- a/toolkit/mozapps/installer/packager.mk
+++ b/toolkit/mozapps/installer/packager.mk
@@ -50,6 +50,7 @@ stage-package: $(MOZ_PKG_MANIFEST) $(MOZ_PKG_MANIFEST_DEPS)
 		) \
 		$(if $(JARLOG_DIR),$(addprefix --jarlog ,$(wildcard $(JARLOG_FILE_AB_CD)))) \
 		$(if $(OPTIMIZEJARS),--optimizejars) \
+		$(if $(DISABLE_JAR_COMPRESSION),--disable-compression) \
 		$(addprefix --unify ,$(UNIFY_DIST)) \
 		$(MOZ_PKG_MANIFEST) $(DIST) $(DIST)/$(STAGEPATH)$(MOZ_PKG_DIR)$(if $(MOZ_PKG_MANIFEST),,$(_BINPATH)) \
 		$(if $(filter omni,$(MOZ_PACKAGER_FORMAT)),$(if $(NON_OMNIJAR_FILES),--non-resource $(NON_OMNIJAR_FILES)))
diff --git a/toolkit/mozapps/installer/packager.py b/toolkit/mozapps/installer/packager.py
index 2b94c6530584..b8b2328a37c0 100644
--- a/toolkit/mozapps/installer/packager.py
+++ b/toolkit/mozapps/installer/packager.py
@@ -265,6 +265,9 @@ def main():
                         help='Enable jar optimizations')
     parser.add_argument('--unify', default='',
                         help='Base directory of another build to unify with')
+    parser.add_argument('--disable-compression', action='store_false',
+                        dest='compress', default=True,
+                        help='Disable jar compression')
     parser.add_argument('manifest', default=None, nargs='?',
                         help='Manifest file name')
     parser.add_argument('source', help='Source directory')
@@ -286,10 +289,11 @@ def main():
     if args.format == 'flat':
         formatter = FlatFormatter(copier)
     elif args.format == 'jar':
-        formatter = JarFormatter(copier, optimize=args.optimizejars)
+        formatter = JarFormatter(copier, compress=args.compress, optimize=args.optimizejars)
     elif args.format == 'omni':
         formatter = OmniJarFormatter(copier,
                                      buildconfig.substs['OMNIJAR_NAME'],
+                                     compress=args.compress,
                                      optimize=args.optimizejars,
                                      non_resources=args.non_resource)
     else:
diff --git a/toolkit/mozapps/installer/upload-files.mk b/toolkit/mozapps/installer/upload-files.mk
index 4ecca40c257d..217ad97eb241 100644
--- a/toolkit/mozapps/installer/upload-files.mk
+++ b/toolkit/mozapps/installer/upload-files.mk
@@ -681,6 +681,11 @@ endif
 
 ifneq (android,$(MOZ_WIDGET_TOOLKIT))
 OPTIMIZEJARS = 1
+ifneq (gonk,$(MOZ_WIDGET_TOOLKIT))
+ifdef NIGHTLY_BUILD
+DISABLE_JAR_COMPRESSION = 1
+endif
+endif
 endif
 
 # A js binary is needed to perform verification of JavaScript minification.