If you just want to switch between several proxies/socks and the direct internet connection, this is the perfect firefox extension.
You can easily define a list, and switch between proxies and socks in a click, then coming back direct with another click.. i can't ask anything more :)
I was using quick proxy (just 1 proxy to setup), but if you need to use more than 1 proxy this is the way to go.
I've also tried foxy proxy but it was too complicated to setup and overengineered overall, besides it hadn't a way to easily switch between different proxies, foxy it's just a way to automate the proxy-website combination as far as i understand, a completely useless task for me.
So this plugin is perfect for the task :)
thanks to the author