Gran Paradiso is the provisional name that a new project receives from the creators of Mozilla Firefox, and which aims to serve as a breeding ground for future versions of the popular web browser.
Gran Paradiso uses the Gecko 1.9 engine, and the most visible virtue for the user on foot is the spectacular page loading speed. There are many other improvements, more technical and less understandable for most users.
Much of the code has been rewritten, there is compatibility with API Web Apps 1.9, it includes new CSS 2.1 values, and much more. Interesting to get an idea of what we can find in the future in Mozilla's browser.
You can free download Gran Paradiso 32, 64 bit and safe install the latest trial or new full version for Windows 10 from the official site.