Bootstrap is a powerful front end framework for creating responsive and faster websites. its developed by the popular social networking company “Twitter”. It includes basic CSS and HTML for creating Grids, Layouts, Typography, Tables, Forms, Navigation, Alerts, Popovers etc
Twitter Bootstrap is created with modern browsers in mind. So, you will find it working perfectly with all the modern versions of Chrome, Firefox, Safari, Opera and Internet Explorer.
Bootstrap is not only for desktop browsers including IE, but in tablet and smartphone browsers via responsive CSS as well.
Since Twitter Bootstrap supports LESS (CSS preprocessor for faster and easier web development), you can include the less css file and less JS file in your HTML page as