diff -r 000000000000 -r 6474c204b198 toolkit/content/tests/chrome/rtlchrome/rtl.css
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/content/tests/chrome/rtlchrome/rtl.css	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,2 @@
+/* Imitate RTL UI */
+window { direction: rtl; }