I highly recommend FoxyProxy for managing proxies in Firefox. http://getfoxyproxy.org/ http://getfoxyproxy.org/ You can easily enable/disable multiple proxy co

I highly recommend FoxyProxy for managing proxies in Firefox. http://getfoxyproxy.org/ http://getfoxyproxy.org/ You can easily enable/disable multiple proxy configurations and there is a rule-based mode where you define which traffic should go out on which proxy. It is great for working remotely when your company doesn't have VPN access or you don't want to set the VPN up.