FoxyProxy is an advanced proxy management tool that completely replaces Firefox’s limited proxying capabilities. It offers more features than SwitchProxy, ProxyButton, QuickProxy, xyzproxy, ProxyTex, TorButton, etc.
Get it here: http://addons.mozilla.org/en-US/firefox/addon/2464
Cool. Thats useful to exclude sensitive sites like Gmail and such.
So what’s a good proxy you rely on?