$OpenBSD: patch-mozilla_storage_mozStorageConnection_cpp,v 1.2 2017/04/05 09:46:18 landry Exp $
--- mozilla/storage/mozStorageConnection.cpp.orig	Wed Feb 15 17:34:47 2017
+++ mozilla/storage/mozStorageConnection.cpp	Sun Feb 19 15:08:41 2017
@@ -782,6 +782,13 @@ Connection::initializeInternal()
     return convertResultCode(srv);
   }
 
+  srv = ::sqlite3_exec(mDBConn, "PRAGMA secure_delete = ON", NULL, NULL, NULL);
+  if (srv != SQLITE_OK) {
+    ::sqlite3_close(mDBConn);
+    mDBConn = nullptr;
+    return convertResultCode(srv);
+  }
+
   // Set the synchronous PRAGMA, according to the preference.
   switch (Service::getSynchronousPref()) {
     case 2:
