Simple and easy to start: If you know HTML and CSS, you can quickly start working with Bootstrap, and its documentation is provided on the official site. No docs or original source files are included. When displayed on tablets, the product images look ugly because of their small size (500x500) and a width of 767 pixels in the browser. I do a catalog using Bootstrap 3. However, Internet Explorer 9 and down is not supported. Free Form controls automatically receive some global styling with Bootstrap: All textual ,