It does what it says Rated 5 out of 5 stars

Great addon! Very simple and works as expected. Some proxies doesn't work, you need to click "change proxy" button a couple of times but I always find a usable proxy IP address. By far much more easy than manually search for proxy lists in the web. Keep up the good work!

This review is for a previous version of the add-on (0.56.1-signed).