diff --git a/browser/components/about/moz.build b/browser/components/about/moz.build
index e1b4c3e6767..20215b3cdfb 100644
--- a/browser/components/about/moz.build
+++ b/browser/components/about/moz.build
@@ -16,6 +16,4 @@ SOURCES += [
 
 LIBRARY_NAME = 'browserabout_s'
 
-FORCE_STATIC_LIB = True
-
 FINAL_LIBRARY = 'browsercomps'
diff --git a/browser/components/dirprovider/moz.build b/browser/components/dirprovider/moz.build
index 6675d632df5..b321efdbc35 100644
--- a/browser/components/dirprovider/moz.build
+++ b/browser/components/dirprovider/moz.build
@@ -20,6 +20,4 @@ XPCSHELL_TESTS_MANIFESTS += [
     'tests/unit/xpcshell.ini',
 ]
 
-FORCE_STATIC_LIB = True
-
 FINAL_LIBRARY = 'browsercomps'
diff --git a/browser/components/feeds/src/moz.build b/browser/components/feeds/src/moz.build
index 11636afdf3d..ece3aa30560 100644
--- a/browser/components/feeds/src/moz.build
+++ b/browser/components/feeds/src/moz.build
@@ -22,6 +22,4 @@ EXTRA_PP_COMPONENTS += [
 
 LIBRARY_NAME = 'browser_feeds_s'
 
-FORCE_STATIC_LIB = True
-
 FINAL_LIBRARY = 'browsercomps'
diff --git a/browser/components/migration/src/moz.build b/browser/components/migration/src/moz.build
index 3705e268b7e..7c8acc3255b 100644
--- a/browser/components/migration/src/moz.build
+++ b/browser/components/migration/src/moz.build
@@ -42,6 +42,4 @@ EXTRA_PP_JS_MODULES += [
     'MigrationUtils.jsm',
 ]
 
-FORCE_STATIC_LIB = True
-
 FINAL_LIBRARY = 'browsercomps'
diff --git a/browser/components/shell/src/moz.build b/browser/components/shell/src/moz.build
index 3b5e1b5a583..6e8b843db98 100644
--- a/browser/components/shell/src/moz.build
+++ b/browser/components/shell/src/moz.build
@@ -27,6 +27,4 @@ EXTRA_COMPONENTS += [
     'nsSetDefaultBrowser.manifest',
 ]
 
-FORCE_STATIC_LIB = True
-
 FINAL_LIBRARY = 'browsercomps'
diff --git a/content/media/omx/mediaresourcemanager/moz.build b/content/media/omx/mediaresourcemanager/moz.build
index b124d406070..e80c13bcbcf 100644
--- a/content/media/omx/mediaresourcemanager/moz.build
+++ b/content/media/omx/mediaresourcemanager/moz.build
@@ -18,6 +18,4 @@ LIBRARY_NAME = 'mediaresourcemanager'
 
 include('/ipc/chromium/chromium-config.mozbuild')
 
-FORCE_STATIC_LIB = True
-
 FINAL_LIBRARY = 'gklayout'
diff --git a/gfx/graphite2/src/moz.build b/gfx/graphite2/src/moz.build
index 89ef95e48a1..9438475fc6a 100644
--- a/gfx/graphite2/src/moz.build
+++ b/gfx/graphite2/src/moz.build
@@ -6,9 +6,7 @@
 
 MODULE = 'graphite2'
 
-if CONFIG['OS_TARGET'] == 'WINNT':
-    FORCE_STATIC_LIB = True
-else:
+if CONFIG['OS_TARGET'] != 'WINNT':
     LIBXUL_LIBRARY = True
 
 # This should contain all of the _PUBLIC_HEADERS from files.mk
diff --git a/gfx/harfbuzz/src/moz.build b/gfx/harfbuzz/src/moz.build
index a2cf6c0a3a8..99d898a8960 100644
--- a/gfx/harfbuzz/src/moz.build
+++ b/gfx/harfbuzz/src/moz.build
@@ -6,9 +6,7 @@
 
 MODULE = 'harfbuzz'
 
-if CONFIG['OS_ARCH'] == 'WINNT':
-    FORCE_STATIC_LIB = True
-else:
+if CONFIG['OS_ARCH'] != 'WINNT':
     LIBXUL_LIBRARY = True
 
 EXPORTS.harfbuzz += [
diff --git a/gfx/ots/src/moz.build b/gfx/ots/src/moz.build
index a92820d4106..63a0838411b 100644
--- a/gfx/ots/src/moz.build
+++ b/gfx/ots/src/moz.build
@@ -6,9 +6,7 @@
 
 MODULE = 'ots'
 
-if CONFIG['OS_TARGET'] == 'WINNT':
-    FORCE_STATIC_LIB = True
-else:
+if CONFIG['OS_TARGET'] != 'WINNT':
     LIBXUL_LIBRARY = True
 
 EXPORTS += [
diff --git a/media/libcubeb/src/moz.build b/media/libcubeb/src/moz.build
index 05c848f7218..3d1ff0918f1 100644
--- a/media/libcubeb/src/moz.build
+++ b/media/libcubeb/src/moz.build
@@ -51,8 +51,6 @@ LIBRARY_NAME = 'cubeb'
 
 MSVC_ENABLE_PGO = True
 
-FORCE_STATIC_LIB = True
-
 if CONFIG['OS_TARGET'] == 'WINNT':
     NO_VISIBILITY_FLAGS = True
 
diff --git a/media/libjpeg/moz.build b/media/libjpeg/moz.build
index d63d14a8de6..eb05ef9229c 100644
--- a/media/libjpeg/moz.build
+++ b/media/libjpeg/moz.build
@@ -150,9 +150,6 @@ LIBRARY_NAME = 'mozjpeg'
 
 MSVC_ENABLE_PGO = True
 
-# need static lib for some of the libimg componentry to link properly
-FORCE_STATIC_LIB = True
-
 if CONFIG['OS_TARGET'] == 'WINNT':
     NO_VISIBILITY_FLAGS = True
 
diff --git a/media/libnestegg/src/moz.build b/media/libnestegg/src/moz.build
index ee9e08ac4a1..fe5ea5132fd 100644
--- a/media/libnestegg/src/moz.build
+++ b/media/libnestegg/src/moz.build
@@ -15,8 +15,6 @@ LIBRARY_NAME = 'nestegg'
 
 MSVC_ENABLE_PGO = True
 
-FORCE_STATIC_LIB = True
-
 if CONFIG['OS_TARGET'] == 'WINNT':
     NO_VISIBILITY_FLAGS = True
 
diff --git a/media/libogg/moz.build b/media/libogg/moz.build
index 0a88ae6f1c0..7ae6571f2f2 100644
--- a/media/libogg/moz.build
+++ b/media/libogg/moz.build
@@ -21,8 +21,6 @@ UNIFIED_SOURCES += [
 
 MSVC_ENABLE_PGO = True
 
-FORCE_STATIC_LIB = True
-
 if CONFIG['OS_TARGET'] == 'WINNT':
     NO_VISIBILITY_FLAGS = True
 
diff --git a/media/libopus/moz.build b/media/libopus/moz.build
index 064011fce06..82ed614df96 100644
--- a/media/libopus/moz.build
+++ b/media/libopus/moz.build
@@ -17,6 +17,4 @@ LIBRARY_NAME = 'opus'
 
 MSVC_ENABLE_PGO = True
 
-FORCE_STATIC_LIB = True
-
 FINAL_LIBRARY = 'gkmedias'
diff --git a/media/libpng/moz.build b/media/libpng/moz.build
index b30d942e223..aaae56d33e4 100644
--- a/media/libpng/moz.build
+++ b/media/libpng/moz.build
@@ -49,8 +49,6 @@ LIBRARY_NAME = 'mozpng'
 
 MSVC_ENABLE_PGO = True
 
-FORCE_STATIC_LIB = True
-
 if CONFIG['OS_TARGET'] == 'WINNT':
     NO_VISIBILITY_FLAGS = True
 
diff --git a/media/libspeex_resampler/src/moz.build b/media/libspeex_resampler/src/moz.build
index 7b13b646fa8..0c761b53ca9 100644
--- a/media/libspeex_resampler/src/moz.build
+++ b/media/libspeex_resampler/src/moz.build
@@ -24,6 +24,4 @@ SOURCES += [
 
 MSVC_ENABLE_PGO = True
 
-FORCE_STATIC_LIB = True
-
 FINAL_LIBRARY = 'gkmedias'
diff --git a/media/libtheora/lib/moz.build b/media/libtheora/lib/moz.build
index 5bca5d6227f..1c4afc8abef 100644
--- a/media/libtheora/lib/moz.build
+++ b/media/libtheora/lib/moz.build
@@ -61,8 +61,6 @@ if CONFIG['GNU_AS']:
 
 MSVC_ENABLE_PGO = True
 
-FORCE_STATIC_LIB = True
-
 if CONFIG['OS_TARGET'] == 'WINNT':
     NO_VISIBILITY_FLAGS = True
 
diff --git a/media/libtremor/lib/moz.build b/media/libtremor/lib/moz.build
index 0f71552ae29..01c933e7baf 100644
--- a/media/libtremor/lib/moz.build
+++ b/media/libtremor/lib/moz.build
@@ -23,6 +23,4 @@ SOURCES += [
     'tremor_window.c',
 ]
 
-FORCE_STATIC_LIB = True
-
 FINAL_LIBRARY = 'gkmedias'
diff --git a/media/libvorbis/moz.build b/media/libvorbis/moz.build
index 3f6f1c2c92d..a9b60d95e1a 100644
--- a/media/libvorbis/moz.build
+++ b/media/libvorbis/moz.build
@@ -47,8 +47,6 @@ if CONFIG['OS_ARCH'] == 'SunOS':
 
 MSVC_ENABLE_PGO = True
 
-FORCE_STATIC_LIB = True
-
 if CONFIG['OS_TARGET'] == 'WINNT':
     NO_VISIBILITY_FLAGS = True
 
diff --git a/media/libvpx/moz.build b/media/libvpx/moz.build
index 74eca772100..07856536495 100644
--- a/media/libvpx/moz.build
+++ b/media/libvpx/moz.build
@@ -94,8 +94,6 @@ SOURCES += [
 
 MSVC_ENABLE_PGO = True
 
-FORCE_STATIC_LIB = True
-
 if CONFIG['OS_TARGET'] == 'WINNT':
     NO_VISIBILITY_FLAGS = True
 
diff --git a/memory/build/moz.build b/memory/build/moz.build
index 6956c278afd..11283efcc0a 100644
--- a/memory/build/moz.build
+++ b/memory/build/moz.build
@@ -33,8 +33,6 @@ if CONFIG['MOZ_REPLACE_MALLOC']:
 
 LIBRARY_NAME = 'memory'
 
-FORCE_STATIC_LIB = True
-
 # Keep jemalloc separated when mozglue is statically linked
 if CONFIG['MOZ_MEMORY'] and (CONFIG['OS_TARGET'] in ('WINNT', 'Darwin', 'Android') or
                              CONFIG['MOZ_NATIVE_JEMALLOC']):
diff --git a/mfbt/moz.build b/mfbt/moz.build
index 7c6380fd8ee..89f370da219 100644
--- a/mfbt/moz.build
+++ b/mfbt/moz.build
@@ -10,8 +10,6 @@ MODULE = 'mozglue'
 
 LIBRARY_NAME = 'mfbt'
 
-FORCE_STATIC_LIB = True
-
 mfbt_root = '.'
 include('common.mozbuild')
 
diff --git a/mozglue/android/moz.build b/mozglue/android/moz.build
index b96e2b90c1c..f5fcd183b2a 100644
--- a/mozglue/android/moz.build
+++ b/mozglue/android/moz.build
@@ -21,6 +21,4 @@ LIBRARY_NAME = 'android'
 
 FAIL_ON_WARNINGS = True
 
-FORCE_STATIC_LIB = True
-
 FINAL_LIBRARY = 'mozglue'
diff --git a/mozglue/linker/moz.build b/mozglue/linker/moz.build
index d10f6e5615d..5c2cd72dff8 100644
--- a/mozglue/linker/moz.build
+++ b/mozglue/linker/moz.build
@@ -23,6 +23,4 @@ HOST_SOURCES += [
 
 HOST_PROGRAM = 'szip'
 
-FORCE_STATIC_LIB = True
-
 FINAL_LIBRARY = 'mozglue'
diff --git a/other-licenses/android/moz.build b/other-licenses/android/moz.build
index c062ff8f57c..4c13232fc1d 100644
--- a/other-licenses/android/moz.build
+++ b/other-licenses/android/moz.build
@@ -27,6 +27,4 @@ SOURCES += [
     'res_state.c',
 ]
 
-FORCE_STATIC_LIB = True
-
 FINAL_LIBRARY = 'mozglue'
diff --git a/parser/expat/lib/moz.build b/parser/expat/lib/moz.build
index fd25980d1c6..6d9d155cf81 100644
--- a/parser/expat/lib/moz.build
+++ b/parser/expat/lib/moz.build
@@ -21,7 +21,4 @@ SOURCES += [
 
 MSVC_ENABLE_PGO = True
 
-# We want only the static lib, not the shared lib
-FORCE_STATIC_LIB = True
-
 FINAL_LIBRARY = 'gkmedias'
diff --git a/toolkit/components/protobuf/moz.build b/toolkit/components/protobuf/moz.build
index 37de36c7c0d..c307fed89b3 100644
--- a/toolkit/components/protobuf/moz.build
+++ b/toolkit/components/protobuf/moz.build
@@ -47,6 +47,4 @@ SOURCES += [
 
 LIBRARY_NAME = 'protobuf_s'
 
-FORCE_STATIC_LIB = True
-
 FINAL_LIBRARY = 'toolkitcomps'
diff --git a/toolkit/crashreporter/breakpad-windows-libxul/moz.build b/toolkit/crashreporter/breakpad-windows-libxul/moz.build
index 49e7f0f6b8a..6d488d4291c 100644
--- a/toolkit/crashreporter/breakpad-windows-libxul/moz.build
+++ b/toolkit/crashreporter/breakpad-windows-libxul/moz.build
@@ -10,6 +10,4 @@ SOURCES += [
 
 LIBRARY_NAME = 'google_breakpad_libxul_s'
 
-FORCE_STATIC_LIB = True
-
 FINAL_LIBRARY = 'xulapp_s'
diff --git a/toolkit/crashreporter/breakpad-windows-standalone/moz.build b/toolkit/crashreporter/breakpad-windows-standalone/moz.build
index 5ed82bca5fa..7364597df52 100644
--- a/toolkit/crashreporter/breakpad-windows-standalone/moz.build
+++ b/toolkit/crashreporter/breakpad-windows-standalone/moz.build
@@ -6,6 +6,4 @@
 
 LIBRARY_NAME = 'google_breakpad_standalone_s'
 
-FORCE_STATIC_LIB = True
-
 FINAL_LIBRARY = 'breakpadinjector'
diff --git a/toolkit/crashreporter/google-breakpad/src/client/linux/crash_generation/moz.build b/toolkit/crashreporter/google-breakpad/src/client/linux/crash_generation/moz.build
index a27946f7d70..e391e09c26c 100644
--- a/toolkit/crashreporter/google-breakpad/src/client/linux/crash_generation/moz.build
+++ b/toolkit/crashreporter/google-breakpad/src/client/linux/crash_generation/moz.build
@@ -13,7 +13,4 @@ SOURCES += [
 
 LIBRARY_NAME = 'crash_generation_s'
 
-# need static lib
-FORCE_STATIC_LIB = True
-
 FINAL_LIBRARY = 'xulapp_s'
diff --git a/toolkit/crashreporter/google-breakpad/src/client/linux/handler/moz.build b/toolkit/crashreporter/google-breakpad/src/client/linux/handler/moz.build
index b182d24e40b..5a92f2b0496 100644
--- a/toolkit/crashreporter/google-breakpad/src/client/linux/handler/moz.build
+++ b/toolkit/crashreporter/google-breakpad/src/client/linux/handler/moz.build
@@ -16,7 +16,4 @@ LIBRARY_NAME = 'exception_handler_s'
 
 XPI_NAME = 'crashreporter'
 
-# need static lib
-FORCE_STATIC_LIB = True
-
 FINAL_LIBRARY = 'xulapp_s'
diff --git a/toolkit/crashreporter/google-breakpad/src/client/linux/minidump_writer/moz.build b/toolkit/crashreporter/google-breakpad/src/client/linux/minidump_writer/moz.build
index f4851b25efa..7a6cbc2f11f 100644
--- a/toolkit/crashreporter/google-breakpad/src/client/linux/minidump_writer/moz.build
+++ b/toolkit/crashreporter/google-breakpad/src/client/linux/minidump_writer/moz.build
@@ -16,7 +16,4 @@ LIBRARY_NAME = 'minidump_writer_s'
 
 XPI_NAME = 'crashreporter'
 
-# need static lib
-FORCE_STATIC_LIB = True
-
 FINAL_LIBRARY = 'xulapp_s'
diff --git a/toolkit/crashreporter/google-breakpad/src/client/mac/crash_generation/moz.build b/toolkit/crashreporter/google-breakpad/src/client/mac/crash_generation/moz.build
index 785eabc24b9..7a2f294ce0b 100644
--- a/toolkit/crashreporter/google-breakpad/src/client/mac/crash_generation/moz.build
+++ b/toolkit/crashreporter/google-breakpad/src/client/mac/crash_generation/moz.build
@@ -15,7 +15,4 @@ LIBRARY_NAME = 'crash_generation_s'
 
 XPI_NAME = 'crashreporter'
 
-# need static lib
-FORCE_STATIC_LIB = True
-
 FINAL_LIBRARY = 'xulapp_s'
diff --git a/toolkit/crashreporter/google-breakpad/src/client/mac/handler/moz.build b/toolkit/crashreporter/google-breakpad/src/client/mac/handler/moz.build
index ea3e4d42b62..7db1f25c520 100644
--- a/toolkit/crashreporter/google-breakpad/src/client/mac/handler/moz.build
+++ b/toolkit/crashreporter/google-breakpad/src/client/mac/handler/moz.build
@@ -17,7 +17,4 @@ LIBRARY_NAME = 'exception_handler_s'
 
 XPI_NAME = 'crashreporter'
 
-# need static lib
-FORCE_STATIC_LIB = True
-
 FINAL_LIBRARY = 'xulapp_s'
diff --git a/toolkit/crashreporter/google-breakpad/src/client/moz.build b/toolkit/crashreporter/google-breakpad/src/client/moz.build
index d1769087d50..7cb1d404778 100644
--- a/toolkit/crashreporter/google-breakpad/src/client/moz.build
+++ b/toolkit/crashreporter/google-breakpad/src/client/moz.build
@@ -14,7 +14,4 @@ LIBRARY_NAME = 'minidump_file_writer_s'
 
 XPI_NAME = 'crashreporter'
 
-# need static lib
-FORCE_STATIC_LIB = True
-
 FINAL_LIBRARY = 'xulapp_s'
diff --git a/toolkit/crashreporter/google-breakpad/src/client/solaris/handler/moz.build b/toolkit/crashreporter/google-breakpad/src/client/solaris/handler/moz.build
index 4ef5d2fe422..53458389933 100644
--- a/toolkit/crashreporter/google-breakpad/src/client/solaris/handler/moz.build
+++ b/toolkit/crashreporter/google-breakpad/src/client/solaris/handler/moz.build
@@ -16,7 +16,4 @@ LIBRARY_NAME = 'exception_handler_s'
 
 XPI_NAME = 'crashreporter'
 
-# need static lib
-FORCE_STATIC_LIB = True
-
 FINAL_LIBRARY = 'xulapp_s'
diff --git a/toolkit/crashreporter/google-breakpad/src/common/linux/moz.build b/toolkit/crashreporter/google-breakpad/src/common/linux/moz.build
index c953eeba3f2..88a070e1328 100644
--- a/toolkit/crashreporter/google-breakpad/src/common/linux/moz.build
+++ b/toolkit/crashreporter/google-breakpad/src/common/linux/moz.build
@@ -34,7 +34,4 @@ if CONFIG['MOZ_CRASHREPORTER']:
 
 LIBRARY_NAME = 'breakpad_linux_common_s'
 
-# need static lib
-FORCE_STATIC_LIB = True
-
 FINAL_LIBRARY = 'xulapp_s'
diff --git a/toolkit/crashreporter/google-breakpad/src/common/mac/moz.build b/toolkit/crashreporter/google-breakpad/src/common/mac/moz.build
index b5b61397908..e082e8d08bf 100644
--- a/toolkit/crashreporter/google-breakpad/src/common/mac/moz.build
+++ b/toolkit/crashreporter/google-breakpad/src/common/mac/moz.build
@@ -34,7 +34,4 @@ SOURCES += [
 
 LIBRARY_NAME = 'breakpad_mac_common_s'
 
-# need static lib
-FORCE_STATIC_LIB = True
-
 FINAL_LIBRARY = 'xulapp_s'
diff --git a/toolkit/crashreporter/google-breakpad/src/common/moz.build b/toolkit/crashreporter/google-breakpad/src/common/moz.build
index 006550f0950..b74b6b80884 100644
--- a/toolkit/crashreporter/google-breakpad/src/common/moz.build
+++ b/toolkit/crashreporter/google-breakpad/src/common/moz.build
@@ -84,7 +84,4 @@ LIBRARY_NAME = 'breakpad_common_s'
 
 MSVC_ENABLE_PGO = True
 
-# need static lib
-FORCE_STATIC_LIB = True
-
 FINAL_LIBRARY = 'xulapp_s'
diff --git a/toolkit/crashreporter/google-breakpad/src/common/solaris/moz.build b/toolkit/crashreporter/google-breakpad/src/common/solaris/moz.build
index e11342b629a..3bf83ea6358 100644
--- a/toolkit/crashreporter/google-breakpad/src/common/solaris/moz.build
+++ b/toolkit/crashreporter/google-breakpad/src/common/solaris/moz.build
@@ -24,7 +24,4 @@ HOST_SOURCES += [
     'guid_creator.cc',
 ]
 
-# need static lib
-FORCE_STATIC_LIB = True
-
 FINAL_LIBRARY = 'xulapp_s'
diff --git a/toolkit/crashreporter/google-breakpad/src/processor/moz.build b/toolkit/crashreporter/google-breakpad/src/processor/moz.build
index 30a62bd6dc1..01db37a116d 100644
--- a/toolkit/crashreporter/google-breakpad/src/processor/moz.build
+++ b/toolkit/crashreporter/google-breakpad/src/processor/moz.build
@@ -25,7 +25,4 @@ SOURCES += [
 
 LIBRARY_NAME = 'breakpad_sps_common_s'
 
-# need static lib
-FORCE_STATIC_LIB = True
-
 FINAL_LIBRARY = 'xulapp_s'
diff --git a/widget/qt/faststartupqt/moz.build b/widget/qt/faststartupqt/moz.build
index 6debcff6813..32ed9d93292 100644
--- a/widget/qt/faststartupqt/moz.build
+++ b/widget/qt/faststartupqt/moz.build
@@ -23,6 +23,4 @@ SOURCES += [
 
 LIBRARY_NAME = 'faststartupqt'
 
-FORCE_STATIC_LIB = True
-
 FINAL_LIBRARY = 'xul'
diff --git a/widget/xremoteclient/moz.build b/widget/xremoteclient/moz.build
index c16d42d4ad2..36db9614212 100644
--- a/widget/xremoteclient/moz.build
+++ b/widget/xremoteclient/moz.build
@@ -10,6 +10,4 @@ PROGRAM = 'mozilla-xremote-client'
 
 LIBRARY_NAME = 'xremote_client_s'
 
-FORCE_STATIC_LIB = True
-
 FINAL_LIBRARY = 'xulapp_s'
diff --git a/xpcom/reflect/xptcall/src/md/os2/moz.build b/xpcom/reflect/xptcall/src/md/os2/moz.build
index bcb5cee53be..b4f8bc6b73b 100644
--- a/xpcom/reflect/xptcall/src/md/os2/moz.build
+++ b/xpcom/reflect/xptcall/src/md/os2/moz.build
@@ -13,7 +13,4 @@ SOURCES += [
 
 LIBRARY_NAME = 'xptcmd'
 
-# we don't want the shared lib, but we want to force the creation of a static lib.
-FORCE_STATIC_LIB = True
-
 FINAL_LIBRARY = 'xpcom_core'
diff --git a/xpcom/reflect/xptcall/src/md/unix/moz.build b/xpcom/reflect/xptcall/src/md/unix/moz.build
index 4e9a245860b..a222eb4138c 100644
--- a/xpcom/reflect/xptcall/src/md/unix/moz.build
+++ b/xpcom/reflect/xptcall/src/md/unix/moz.build
@@ -324,7 +324,4 @@ if CONFIG['OS_ARCH'] == 'Linux':
 
 LIBRARY_NAME = 'xptcmd'
 
-# we don't want the shared lib, but we want to force the creation of a static lib.
-FORCE_STATIC_LIB = True
-
 FINAL_LIBRARY = 'xpcom_core'
diff --git a/xpcom/reflect/xptcall/src/md/win32/moz.build b/xpcom/reflect/xptcall/src/md/win32/moz.build
index 53728623b7c..02158a1b8d6 100644
--- a/xpcom/reflect/xptcall/src/md/win32/moz.build
+++ b/xpcom/reflect/xptcall/src/md/win32/moz.build
@@ -38,7 +38,4 @@ else:
 
 LIBRARY_NAME = 'xptcmd'
 
-# we don't want the shared lib, but we want to force the creation of a static lib.
-FORCE_STATIC_LIB = True
-
 FINAL_LIBRARY = 'xpcom_core'
diff --git a/xpcom/string/src/moz.build b/xpcom/string/src/moz.build
index 417bc983672..5f05efd7a79 100644
--- a/xpcom/string/src/moz.build
+++ b/xpcom/string/src/moz.build
@@ -33,8 +33,4 @@ LIBRARY_NAME = 'string_s'
 
 MSVC_ENABLE_PGO = True
 
-# we don't want the shared lib, but we want to force the creation of a
-# static lib.
-FORCE_STATIC_LIB = True
-
 FINAL_LIBRARY = 'xpcom_core'