"Puffin for Facebook" is NOT associated with Facebook, Inc. It is developed by CloudMosa, Inc. -- the creator of the Puffin Web Browser.
Puffin for Facebook is a special edition of Puffin browser optimized for Facebook users. Its motto is "Better for Less" -- a better user experience for less data usage.
A better user experience is made possible by Puffin's wicked fast cloud rendering. Puffin Browser is faster than other browsers or even native apps on high-end phones. The performance advantage is especially noticeable on mainstream or low-end phones.
Less data usage is made possible by Puffin's wicked efficient data compression. Puffin Browser consumes 80-90% less data than other browsers or even native apps. The data savings are more significant on slower network connections, like in developing countries or during data roaming.
Puffin for Facebook removes the traditional web browser UI for a fully immersed Facebook experience. Puffin UI is kept as subtle and intuitive as possible