One interesting item in the chat rooms these days is Mozilla's announcement that it plans to end its involvement with the famous Mozilla Thunderbird mail client. Firefox and Thunderbird used to be twins – two hot, new built-for-the-future desktop tools rising from the ashes of the old Mozilla browser community, which itself had risen from the ashes of a pioneering Internet company known as Netscape. The Firefox web browser and Thunderbird mail client saw their first major releases within a month of each other back in 2004, and both embodied the vision of a sleek, sensible, single-purpose tool to replace the dinosaurs of an earlier era.