First of all you have too download bengali font for windows 7 and for that just google "bengali font for windows 7" . Mozilla Firefox support viewing Bangla scripts (and indic scripts in general) once you have enabled unicode support in your operating system and installed the fonts... From your Post I understand that you already installed a language pack just check that version is supported by windows 7.. Also go through the following link http://www.youtube.com/watch?v=74Aycz7PM4A

Happy Browsing :)

See http://www.khamarbd.com/font.htm

Firefox (OsX 10.5) freezes when opening Bengali Unicode webpages (http://amarbanglaweb-bd.com, http://www.campusnewsbd.com, http://www.doctorshomebd.com/ .. etc.).

Try a check for corrupted and duplicate fonts and other font issues:

• http://www.thexlab.com/faqs/multipleappsquit.html - Font Book 2.0 Help: Checking for damaged fonts
• http://www.creativetechs.com/iq/garbled_fonts_troubleshooting_guide.html

Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).

• Do NOT click the Reset button on the Safe mode start window or otherwise make changes.

• https://support.mozilla.org/kb/Safe+Mode
• https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes