Bug 1753948 - Support MOZ_FUZZ_DEBUG in nsJSUtils. r=baku

Differential Revision: https://phabricator.services.mozilla.com/D137989

dom/base/nsJSUtils.cpp

@@ -248,6 +248,11 @@ void nsJSUtils::ResetTimeZone() { JS::ResetTimeZone(); }
 
 /* static */
 bool nsJSUtils::DumpEnabled() {
+#ifdef FUZZING
+  static bool mozFuzzDebug = !!PR_GetEnv("MOZ_FUZZ_DEBUG");
+  return mozFuzzDebug;
+#endif
+
 #if defined(DEBUG) || defined(MOZ_ENABLE_JS_DUMP)
   return true;
 #else