Firefox linux builds provided by mozilla.org does not by default have indian lanuguage support.
For using firefox for viewing indian language pages we need to build firefox with certain "indic enabling" options like pango.
firefox 2.0.0.3 package with indic langauge support is released today by tamil firefox project team.
Download firefox 2.0.0.3 indic package from here:
https://sourceforge.net/project/showfiles.php?group_id=145762&package_id=230952... read more