diff -r 000000000000 -r 6474c204b198 toolkit/content/tests/chrome/rtlchrome/rtl.manifest
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/content/tests/chrome/rtlchrome/rtl.manifest	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,5 @@
+content rtlchrome /
+
+# Override intl.css with our own CSS file
+override chrome://global/locale/intl.css chrome://rtlchrome/rtl.css
+override chrome://global/locale/global.dtd chrome://rtlchrome/rtl.dtd