save the userChrome.css file, then restart Firefox. The horizontal tab bar should now be invisible, leaving only a streamlined menu bar that includes navigation buttons, the address bar ...

The library comes with several pre-styled elements, including buttons, windows, checkboxes, sliders, tabs ... Just like 98.css, XP.css relies on semantic HTML and doesn’t contain any JavaScript ...

jsFiddle is the perfect solution; it provides a custom environment (based on user selections) to test (or fiddle with) your JavaScript, HTML, and CSS code right inside your browser. A quick tour ...