--- firefox.orig/PKGBUILD	2016-05-16 22:47:47.866282190 +0200
+++ firefox/PKGBUILD	2016-05-16 22:48:47.912310410 +0200
@@ -83,6 +83,9 @@
   # _FORTIFY_SOURCE causes configure failures
   CPPFLAGS+=" -O2"
 
+  # Use full RELRO hardening
+  LDFLAGS+=" -Wl,-z,relro,-z,now"
+
   export PATH="$srcdir/path:$PATH"
 
   # Do PGO