diff --git a/modules/libpref/init/all.js b/modules/libpref/init/all.js
index 26e539f1dd81..3a14cca9de3b 100644
--- a/modules/libpref/init/all.js
+++ b/modules/libpref/init/all.js
@@ -3338,7 +3338,7 @@ pref("dom.ipc.processCount.file", 1);
 pref("dom.ipc.processCount.extension", 1);
 
 // Don't use a native event loop in the content process.
-pref("dom.ipc.useNativeEventProcessing.content", true);
+pref("dom.ipc.useNativeEventProcessing.content", false);
 
 // Quantum DOM scheduling:
 pref("dom.ipc.scheduler", false);