Large CSS files can pose challenges, such as slowing down the site and making maintenance more complex.

Standing for cascading style sheets, CSS files are used inside browsers to load rules for stylizing a web page's elements with the help of the CSS language.

Edits to your Firefox profile's userChrome.css file can make all sorts of fun and useful changes to the fox's chrome, menus, dialogs and toolbars. For instance, I've disabled the Forward, Back and ...