diff --git a/application/palemoon/app/moz.build b/application/palemoon/app/moz.build
index f9955c0979..8b358b6228 100644
--- a/application/palemoon/app/moz.build
+++ b/application/palemoon/app/moz.build
@@ -9,7 +9,7 @@ DIRS += ['profile/extensions']
 
 GeckoProgram(CONFIG['MOZ_APP_NAME'])
 
-JS_PREFERENCE_FILES += [
+JS_PREFERENCE_PP_FILES += [
     'profile/palemoon.js',
 ]
 
diff --git a/application/palemoon/branding/shared/branding.mozbuild b/application/palemoon/branding/shared/branding.mozbuild
index 0b99ec2237..fc832dbe7c 100644
--- a/application/palemoon/branding/shared/branding.mozbuild
+++ b/application/palemoon/branding/shared/branding.mozbuild
@@ -6,7 +6,7 @@
 
 @template
 def ApplicationBranding():
-    JS_PREFERENCE_FILES += [
+    JS_PREFERENCE_PP_FILES += [
         'pref/palemoon-branding.js',
     ]
 
@@ -49,4 +49,4 @@ def ApplicationBranding():
     DEFINES['MOZ_APP_VERSION'] = CONFIG['MOZ_APP_VERSION']
     DEFINES['MOZ_BRANDING_DIRECTORY'] = CONFIG['MOZ_BRANDING_DIRECTORY']
     DEFINES['MOZILLA_UAVERSION_U'] = CONFIG['MOZILLA_UAVERSION_U']
-    DEFINES['MOZILLA_COMPATVERSION_U'] = CONFIG['MOZILLA_COMPATVERSION_U']
\ No newline at end of file
+    DEFINES['MOZILLA_COMPATVERSION_U'] = "52.9"