Following is the procedure of installation of UrduBar on FireFox (my favorite web browser)
Note: You may either download the UrduBar.XPI to your hard drive then install it(as show in this web page) or install it directly from the web.
Open the file dialog as shown bellow
Select the urdubar.xpi as shown below
Following dialog will be displayed, Press "Install Now" button.
Click on restart button to complete the installation
This is how Urdu Bar toolbar looks like in FireFox.
Click here to view how to 'use' the UrduBar Toolbar. (Flash Movie)