diff -up firefox-32.0/mozilla-release/media/libstagefright/moz.build.old firefox-32.0/mozilla-release/media/libstagefright/moz.build
--- firefox-32.0/mozilla-release/media/libstagefright/moz.build.old	2014-08-26 05:38:08.000000000 +0200
+++ firefox-32.0/mozilla-release/media/libstagefright/moz.build	2014-08-27 15:40:12.030299348 +0200
@@ -120,7 +120,6 @@ elif CONFIG['GNU_CXX']:
         '-Wno-sign-compare'
     ]
     CXXFLAGS += [
-        '-Wno-format',
         '-Wno-multichar',
         '-Wno-sign-compare',
         '-Wno-unused',