I need a proxy program or a Firefox plugin that will change my external IP and the shift of power and easy ..?

I want a program or a plugin for Firefox that allows me to click a button or only a few and will automatically change proxy servers. The change has to be a new proxy is not used that day, and I want the proxy list is maintained by the program and I have to go and check the status of power all the time. Does anyone know of something like this?

You can unblock sites that are blocked with a web proxy. Here is one: http://www.keytodoor.info/ This site will enable you to log on myspace, comment, see 2 pages, send messages, etc.. Also when you visit the proxy has the option to sign up to receive new powers in your email or SMS text message his cell phone. Both options are free. If you like this proxy, make sure Tell your friends and publish it in your MySpace, Facebook, Orkut or page to your blog. Happy Surfing!

The Ultimate Proxy: Tor