here is the screen shot

Note that Windows XP requires to install support for complex scripts.

• http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/int_pr_install_complex_languages.mspx

Does this also happen with other Unicode ranges?

• http://en.wikibooks.org/wiki/Unicode/Character_reference/0000-0FFF
• http://en.wikipedia.org/wiki/Bengali_script

nope.. except english, it is showing nothing...

Please update to Firefox 20.0.1 Update Firefox to the latest release

Which fonts do you see in Preferences > Content?

• Firefox > Preferences > Content : Fonts & Colors > Advanced > Minimum Font Size (none)

Are a lot of fonts missing?

Did you check the settings in the emulator to see if you can add more fonts?

Did you verify that XP can display such fonts?

Do you have IE installed as well to see if it works in IE?

IE also not showing the font.

Firefox preference shows that there is bengali. (Screen shot attached).

Strange problem... Let's see if XP can show TTF font of Bangla.

But google uses unicode embedded right??

Mishu~

Windows XP can't display complex script characters by default.
This is only possible if you've installed support for complex script like I posted above.

Did you try to install this support?

• http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/int_pr_install_complex_languages.mspx