Firefox: FoxyURL is both a URL shortening website and a Firefox extension that is fantastically simple to use. If URL shortening was any easier, it would have to be telepathic
You can shorten URLs by using the FoxyURL website or by using the available Firefox extension. The extension is lightweight and the button can be positioned anywhere on your toolbar—seen above nestled between the address bar and the search box. URL creation is dead simple, when you’re on the URL you’d like to shorten you simply click the button and the URL is automatically generated with a shortcut button to copy it to your clipboard. URL storage is indefinite, as long as FoxyURL is around your link will always point to the appropriate address. FoxyURL is free and works wherever Firefox does.