--- a/browser/config/mozconfigs/win32/common-opt
+++ b/browser/config/mozconfigs/win32/common-opt
@@ -1,10 +1,14 @@
 # This file is sourced by the nightly, beta, and release mozconfigs.
 
+# TODO remove once configure defaults to stylo once stylo enabled
+# on all platforms.
+ac_add_options --enable-stylo=build
+
 . "$topsrcdir/browser/config/mozconfigs/common"
 
 ac_add_options --enable-update-channel=${MOZ_UPDATE_CHANNEL}
 ac_add_options --enable-jemalloc
 
 if [ -f /c/builds/gapi.data ]; then
   _gapi_keyfile=c:/builds/gapi.data
 else

--- a/browser/config/mozconfigs/win32/debug
+++ b/browser/config/mozconfigs/win32/debug
@@ -1,12 +1,16 @@
 . "$topsrcdir/build/mozconfig.win-common"
 MOZ_AUTOMATION_L10N_CHECK=0
 . "$topsrcdir/browser/config/mozconfigs/common"
 
+# TODO remove once configure defaults to stylo once stylo enabled
+# on all platforms.
+ac_add_options --enable-stylo=build
+
 ac_add_options --enable-debug
 ac_add_options --enable-dmd
 ac_add_options --enable-profiling  # needed for --enable-dmd to work on Windows
 ac_add_options --enable-verify-mar
 
 # Needed to enable breakpad in application.ini
 export MOZILLA_OFFICIAL=1
 

--- a/browser/config/mozconfigs/win64/common-opt
+++ b/browser/config/mozconfigs/win64/common-opt
@@ -1,10 +1,14 @@
 # This file is sourced by the nightly, beta, and release mozconfigs.
 
+# TODO remove once configure defaults to stylo once stylo enabled
+# on all platforms.
+ac_add_options --enable-stylo=build
+
 . "$topsrcdir/browser/config/mozconfigs/common"
 
 ac_add_options --enable-update-channel=${MOZ_UPDATE_CHANNEL}
 ac_add_options --enable-jemalloc
 if [ -f /c/builds/gapi.data ]; then
   _gapi_keyfile=c:/builds/gapi.data
 else
   _gapi_keyfile=e:/builds/gapi.data

--- a/browser/config/mozconfigs/win64/debug
+++ b/browser/config/mozconfigs/win64/debug
@@ -1,15 +1,19 @@
 . "$topsrcdir/build/mozconfig.win-common"
 MOZ_AUTOMATION_L10N_CHECK=0
 . "$topsrcdir/browser/config/mozconfigs/common"
 
 ac_add_options --target=x86_64-pc-mingw32
 ac_add_options --host=x86_64-pc-mingw32
 
+# TODO remove once configure defaults to stylo once stylo enabled
+# on all platforms.
+ac_add_options --enable-stylo=build
+
 ac_add_options --enable-debug
 ac_add_options --enable-dmd
 ac_add_options --enable-profiling  # needed for --enable-dmd to work on Windows
 ac_add_options --enable-verify-mar
 
 # Needed to enable breakpad in application.ini
 export MOZILLA_OFFICIAL=1