--- a/chrome/browser/background/background_mode_manager.cc	2017-10-04 18:07:33.000000000 -0400
+++ b/chrome/browser/background/background_mode_manager.cc	2017-10-08 18:58:08.460567925 -0400
@@ -363,7 +363,7 @@
   registry->RegisterBooleanPref(prefs::kChromeCreatedLoginItem, false);
   registry->RegisterBooleanPref(prefs::kMigratedLoginItemPref, false);
 #endif
-  registry->RegisterBooleanPref(prefs::kBackgroundModeEnabled, true);
+  registry->RegisterBooleanPref(prefs::kBackgroundModeEnabled, false);
 }
 
 void BackgroundModeManager::RegisterProfile(Profile* profile) {