Installed this, and doesn't work, only made my firefox 5x slower, had to register to this, to "unlock" usa, which also doens't work, as the website I tried seeing, still said: you're in Spain and this website only works in the USA.
so in my experience, it does not work at all. (and yes, I restarted firefox completely after installing this plugin. (and twice just to be sure, but still, doesn't work)

also, super bad: no way to remove your account after registration with them.
horrible website to be honest if you cannot even remove your account there.