How to Use Proxies in Mozilla Firefox 3.5.1 with Pictures

Hi friends,
I have seen many people asking on how to set the proxy. See using a proxy is simple and i am going to demonstrate it with the help of Mozilla Firefox 3.5.1
Step 1:
Select tools from your browser. Then go to options.

Step 2:

In that options go to "advanced".. see the right side top corner.

Step 3: 

Select network and select settings as shown in the figure.

Step 4: 

Next is to select the option Manual Proxy configuration. Then put in your desired ip address. For ip and proxies you can find a list of websites all around google. Search in google for proxy sites and obtain one ip[ address and port. Usually an ip would 4 sets of numbers separated by dots and a proxy would be like 8080, 3250.

Step 5: 
Click on OK and restart your firefox browser. Then visit here.Tips and tricks. See in the feedjit your country would be changed..
If you would like see a similar tutorial for opera and chrome, I am ready to give but based on your responses.