diff --git a/mozilla/browser/installer/removed-files.in b/mozilla/browser/installer/removed-files.in
index da17bc4be45..ec9a5691e99 100644
--- a/mozilla/browser/installer/removed-files.in
+++ b/mozilla/browser/installer/removed-files.in
@@ -641,3 +641,24 @@ components/aboutCertError.js
 #else
 xpicleanup
 #endif
+#ifdef XP_WIN
+# Files added by 3.6 that need to be removed by the win32 installer on downgrade
+components/components.list
+components/GPSDGeolocationProvider.js
+components/nsFormAutoComplete.js
+components/nsPlacesAutoComplete.js
+components/nsUpdateServiceStub.js
+components/nsUpdateTimerManager.js
+extensions/{972ce4c6-7e08-4474-a285-3208198ce6fd}/icon.png
+extensions/{972ce4c6-7e08-4474-a285-3208198ce6fd}/preview.png
+modules/CertUtils.jsm
+modules/ctypes.jsm
+modules/FileUtils.jsm
+modules/LightweightThemeConsumer.jsm
+modules/LightweightThemeManager.jsm
+modules/NetUtil.jsm
+modules/NetworkPrioritizer.jsm
+modules/WindowsPreviewPerTab.jsm
+res/broken-image.png
+res/loading-image.png
+#endif