Those users that use a proxy server for their network connections can now use FoxyProxy, a pack of tools for Mozilla Firefox with which they will be able to configure and manage everything that involves their proxy connections.
FoxyProxy is an extension for that browser, even though it will supposedly be launched for Internet Explorer and Google Chrome at a yet to be set date. This tool is capable of alternating between one or more proxies automatically using URL patterns as a reference. Forget about having to configure the properties of your Firefox connection manually, FoxyProxy can do it for you.
If you usually use this type of connection when browsing over Internet and you are a Firefox user, this complement is what you were looking for. Configure and manage your connections over proxy servers once you download FoxyProxy free.