The persian localization of firefox 2.0 browser is currently available as beta.
This blog will assist you in downloading and installing of the Firefox 2.0 Persian Language Pack
1) Download Firefox 2.0 (if you still use Internet explorer, or not the latest version of Firefox)
2) Then install the "Quick Locale Switcher" extension.
You need this extension to switch to the persian language, after installation.
3) Now you can install the Persian Language Pack with Firefox.
4) Finally, choose menu Tools\Quick Locale Switcher and choose fa-IR
After restarting Firefox, your browser should appear in persian. Please refer to the following quick reference, if you are using persian software for first time.
file: پرونده
edit: ویرایش
view: نمایش
history: پیشینه
favourites: مورد علاقه ها
Tools: ابزار
options: تنظیمات
help: راهنما
Using quick locale switcher you could switch to your original language.
Thanks.