diff -up firefox-24.3.0/mozilla-esr24/configure.in.nss firefox-24.3.0/mozilla-esr24/configure.in
--- firefox-24.3.0/mozilla-esr24/configure.in.nss	2014-01-30 15:46:38.000000000 +0100
+++ firefox-24.3.0/mozilla-esr24/configure.in	2014-01-30 17:01:30.614179142 +0100
@@ -3944,7 +3944,7 @@ MOZ_ARG_WITH_BOOL(system-nss,
     _USE_SYSTEM_NSS=1 )
 
 if test -n "$_USE_SYSTEM_NSS"; then
-    AM_PATH_NSS(3.15.4, [MOZ_NATIVE_NSS=1], [AC_MSG_ERROR([you don't have NSS installed or your version is too old])])
+    AM_PATH_NSS(3.15.3, [MOZ_NATIVE_NSS=1], [AC_MSG_ERROR([you don't have NSS installed or your version is too old])])
 fi
 
 if test -n "$MOZ_NATIVE_NSS"; then