diff --git a/mozilla/tools/tinderbox-configs/firefox/macosx/CLOBBER b/mozilla/tools/tinderbox-configs/firefox/macosx/CLOBBER
index 0fa12686b5a..590a630414b 100644
--- a/mozilla/tools/tinderbox-configs/firefox/macosx/CLOBBER
+++ b/mozilla/tools/tinderbox-configs/firefox/macosx/CLOBBER
@@ -1,2 +1 @@
-Clobbering to test some different build optimization flags for sayrer.
-Also clobbering to generate a new nightly for testing.
+Clobbering to test some more build optimization flags for sayrer.
diff --git a/mozilla/tools/tinderbox-configs/firefox/macosx/mozconfig b/mozilla/tools/tinderbox-configs/firefox/macosx/mozconfig
index 1c556943892..916a3cc4035 100644
--- a/mozilla/tools/tinderbox-configs/firefox/macosx/mozconfig
+++ b/mozilla/tools/tinderbox-configs/firefox/macosx/mozconfig
@@ -12,7 +12,7 @@ mk_add_options MOZ_OBJDIR=@TOPSRCDIR@/../build/universal
 
 ac_add_options --enable-application=browser
 ac_add_options --enable-update-channel=nightly
-ac_add_options --enable-optimize="-Oz -gfull"
+ac_add_options --enable-optimize="-Oz -freorder-blocks -fno-reorder-functions -gfull"
 ac_add_options --disable-debug
 ac_add_options --disable-tests
 ac_add_options --enable-update-packaging