diff -r 000000000000 -r 6474c204b198 content/media/test/make-headers.sh
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/content/media/test/make-headers.sh	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,22 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+# Script to generate ^header^ files for all media files we use.
+# This is to ensure that our media files are not cached by necko,
+# so that our detection as to whether the server supports byte range
+# requests is not interferred with by Necko's cache. See bug 977398
+# for details. Necko will fix this in bug 977314. 
+
+FILES=(`ls *.ogg *.ogv *.webm *.mp3 *.opus *.mp4 *.wav`)
+
+rm *.ogg^headers^ *.ogv^headers^ *.webm^headers^ *.mp3^headers^ *.opus^headers^ *.mp4^headers^ *.wav^headers^
+
+# Restore special headers.
+echo "X-Content-Duration: 1.96" > bug500311.ogv^headers^
+echo "X-Content-Duration: 9000" > bug520908.ogv^headers^
+
+for i in "${FILES[@]}"
+do
+  echo "Cache-Control: no-store" >> $i^headers^
+done