China Channel is a Firefox add-on which is built to give users outside china an experience how it feels when you are surfing within China. This plugin routes all internet traffic to computers on the inside of the Chinese firewall, allowing web surfers to experience an Internet identical to that of Chinese.
Once installed you will need to select China Channel and then click Go. This will then connect you through random proxy servers in China. Below is a small video that explains how everything is done. Also you will have to make sure that Firefox is able to install Addons from third party.