You can go through the following procedure to read Persian Fonts in Farsi on the Web:
  1. Download the file corresponding to your Operating System or platform:
  2. (RIGHT click on the appropriate file and "Save Link as..." on the desktop to be imported into Font Folder and installed on your Computer.)

  3. Install the font on your Operating System (read the FAQ for details.)

  4. [Skip this step if your browser is Netscape Navigator 3.0 or Internet Explorer 3.0]

  5. If you are using Netscape Navigator on a Mac, make sure to set Document Encoding (from the Options menu) to Western (MacRoman).
Please read the FAQ file  
if you had any questions!