Internet Explorer 8 and 9 Internet Explorer 8 and 9 are also supported, however, please be aware that some CSS3 properties and HTML5 elements are not fully supported by these browsers. In addition, Internet Explorer 8 requires the use of Respond.js to enable media query support. While we don’t officially support any third party plugins or add-ons, we do offer some useful advice to help avoid potential issues in your projects. The docs/ folder includes the source code for our documentation, and examples/ of Bootstrap usage. Navbar Dropdowns The .dropdown-backdrop element isn’t used on iOS in the nav because of the complexity of z-indexing. Customize the values of the @screen-* Less variables so that your printer paper is considered larger than extra-small.