--- a/js/src/vm/Runtime.cpp     Fri May 23 14:08:43 2014 +0300
+++ b/js/src/vm/Runtime.cpp     Fri May 23 14:20:25 2014 +0300
@@ -649,7 +649,8 @@
 {
   // Don't bother trying to cache the getenv lookup; this should be called
   // infrequently.
-  return !!getenv("JS_DISABLE_SLOW_SCRIPT_SIGNALS");
+  // return !!getenv("JS_DISABLE_SLOW_SCRIPT_SIGNALS");
+  return true; /* disable slow scrit signals to fix segfaults */
 }

 void