diff --git a/mozilla/tools/tinderbox-configs/firefox/win32/CLOBBER b/mozilla/tools/tinderbox-configs/firefox/win32/CLOBBER
index 5f670de71e2..b4c6b3f3a92 100644
--- a/mozilla/tools/tinderbox-configs/firefox/win32/CLOBBER
+++ b/mozilla/tools/tinderbox-configs/firefox/win32/CLOBBER
@@ -1 +1 @@
-Clobbering for PGO
+backout PGO
diff --git a/mozilla/tools/tinderbox-configs/firefox/win32/mozconfig b/mozilla/tools/tinderbox-configs/firefox/win32/mozconfig
index 0d458c4e1bf..e668201097d 100644
--- a/mozilla/tools/tinderbox-configs/firefox/win32/mozconfig
+++ b/mozilla/tools/tinderbox-configs/firefox/win32/mozconfig
@@ -9,7 +9,6 @@ export LDFLAGS="-LTCG"
 mk_add_options MOZ_CO_PROJECT=browser
 mk_add_options MOZ_MAKE_FLAGS="-j5"
 mk_add_options MOZ_CO_MODULE="mozilla/tools/update-packaging"
-mk_add_options PROFILE_GEN_SCRIPT='$(PYTHON) $(MOZ_OBJDIR)/_profile/pgo/profileserver.py'
 
 ac_add_options --enable-application=browser
 ac_add_options --enable-update-channel=nightly
diff --git a/mozilla/tools/tinderbox-configs/firefox/win32/tinder-config.pl b/mozilla/tools/tinderbox-configs/firefox/win32/tinder-config.pl
index e585d1f9c4b..50cef9cd620 100644
--- a/mozilla/tools/tinderbox-configs/firefox/win32/tinder-config.pl
+++ b/mozilla/tools/tinderbox-configs/firefox/win32/tinder-config.pl
@@ -190,7 +190,6 @@ $BinaryName = 'firefox.exe';
 #$NSPRArgs = '';
 #$ShellOverride = '';
 
-$ProfiledBuild = 1;
 # Release build options
 $ReleaseBuild  = 1;
 $shiptalkback  = 0;