diff -urNp firefox-52.4.0esr.orig/memory/mozalloc/mozalloc_abort.cpp firefox-52.4.0esr/memory/mozalloc/mozalloc_abort.cpp
--- firefox-52.4.0esr.orig/memory/mozalloc/mozalloc_abort.cpp	2017-12-04 16:29:43.956029600 +0100
+++ firefox-52.4.0esr/memory/mozalloc/mozalloc_abort.cpp	2017-12-04 18:21:05.296157795 +0100
@@ -55,7 +55,7 @@ void fillAbortMessage(char (&msg)[N], ui
 }
 #endif
 
-#if defined(XP_UNIX) && !defined(MOZ_ASAN)
+#if 0
 // Define abort() here, so that it is used instead of the system abort(). This
 // lets us control the behavior when aborting, in order to get better results
 // on *NIX platforms. See mozalloc_abort for details.
