In RTL locale the scroll bar should be at the left hand of window, but in firefox 19.0.2 scroll bar is at right hand.

[~]$locale
LANG=fa_IR.utf8
LC_CTYPE="fa_IR.utf8"
LC_NUMERIC="fa_IR.utf8"
LC_TIME="fa_IR.utf8"
LC_COLLATE="fa_IR.utf8"
LC_MONETARY="fa_IR.utf8"
LC_MESSAGES="fa_IR.utf8"
LC_PAPER="fa_IR.utf8"
LC_NAME="fa_IR.utf8"
LC_ADDRESS="fa_IR.utf8"
LC_TELEPHONE="fa_IR.utf8"
LC_MEASUREMENT="fa_IR.utf8"
LC_IDENTIFICATION="fa_IR.utf8"
LC_ALL=
[~]$firefox -v
Mozilla Firefox 19.0.2