diff -up mozilla-release/toolkit/xre/nsAppRunner.cpp.884831 mozilla-release/toolkit/xre/nsAppRunner.cpp
--- mozilla-release/toolkit/xre/nsAppRunner.cpp.884831	2015-07-06 14:36:32.583521873 +0200
+++ mozilla-release/toolkit/xre/nsAppRunner.cpp	2015-07-06 14:45:19.494258581 +0200
@@ -2770,7 +2770,7 @@ static void MOZ_gdk_display_close(GdkDis
     // shut down cairo first otherwise it may crash because of dangling
     // references to Display objects (see bug 469831).
     if (!theme_is_qt)
-      gdk_display_close(display);
+      //gdk_display_close(display);
   }
 
   // Clean up PangoCairo's default fontmap.
@@ -2807,7 +2807,7 @@ static void MOZ_gdk_display_close(GdkDis
 
   if (buggyCairoShutdown) {
     if (!theme_is_qt)
-      gdk_display_close(display);
+      //gdk_display_close(display);
   }
 #else // not CLEANUP_MEMORY
   // Don't do anything to avoid running into driver bugs under XCloseDisplay().