There are many free VPN proxy. You can edit your Block lists, and change the fastest proxy from Proxy lists.
There are Many Free Proxy servers for you.
The system automatically detects blocked sites and add to block lists, and you can add or remove manually.
ManyProxy extention provides hundreds of proxy server all over dozens of countries. You can test the speed of every proxy, and select the fastest one.
You can access to blocked services and content such as YouTube, Facebook, Twitter, Netflix, BBC, Pandora and so on.