--- firefox-52.0.1/extensions/spellcheck/hunspell/glue/hunspell_alloc_hooks.h.orig	2017-03-30 19:14:25.432885614 +0200
+++ firefox-52.0.1/extensions/spellcheck/hunspell/glue/hunspell_alloc_hooks.h.orig	2017-03-30 19:14:36.519084491 +0200
@@ -51,8 +51,8 @@ 
 #include "mozHunspellAllocator.h"
 
 #define malloc(size) HunspellAllocator::CountingMalloc(size)
-#define calloc(count, size) HunspellAllocator::CountingCalloc(count, size)
-#define free(ptr) HunspellAllocator::CountingFree(ptr)
+//#define calloc(count, size) HunspellAllocator::CountingCalloc(count, size)
+//#define free(ptr) HunspellAllocator::CountingFree(ptr)
 #define realloc(ptr, size) HunspellAllocator::CountingRealloc(ptr, size)
 
 #endif