Foundation is a free responsive front-end framework, providing a responsive grid and HTML and CSS UI components, templates, and code snippets, including typography, forms, buttons, navigation and other interface elements, as well as optional functionality provided by JavaScript extensions.

The team started working on the next version of Foundation for Sites 7 which most likely will drop support for older browsers and implement newer technologies like flexbox or maybe calculated grid system.

[6] This means the graphic design of web pages adjusts dynamically, taking into account the characteristics of the device used (PC, tablet, mobile phone).

Version 4.0 has taken a mobile-first approach, designing and developing for mobile devices first, and enhancing the web pages and applications for larger screens.

These provide a browser and system-wide uniform, modern appearance for formatting text, tables and form elements.

the official ZURB blog explains,[9] and the unsigned writer claims that the switch back was due to issues of compatibility with customized efforts; and that performance was found to be not as good, on use testing with the newer jQuery-2.

Foundation then provides a command line interface to modify and compile source to CSS for use in HTML page markup.