Mozilla has updated Thimble, its online code editor. The app now has a sleeker interface, and allows you to drag-and-drop a zipped website into the interface so you can start picking through it straight away.
In addition to a refreshed interface and drag-and-drop hacking, Thimble also has a slew of better tutorials for those just starting out. There is also a Web preview tool so users know just how their design will look on mobile.
Mozilla says the new Thimble is better at editing code, and will serve educators better in the classroom with the new features.