As the CSS3 Modules specifications have yet to be either ratified by the W3C or have all their proposed features fully implemented into browsers, browser vendors use what's known as vendor prefixes to test new "experimental" CSS features. Whilst this helps browser makers implement the new CSS3 modules, it makes our lives, as writers of CSS3, just a little more tedious. Consider the following code for a rounded corner in CSS3:
.round{
-khtml-border-radius: 10px; /* Konqueror */
-rim-border-radius: 10px; /* RIM */
-ms-border-radius: 10px; /* Microsoft */
-o-border-radius: 10px; /* Opera */
-moz-border-radius: 10px; /* Mozilla (e.g Firefox) */
-webkit-border-radius: 10px; /* Webkit (e.g. Safari and Chrome) */
border-radius: 10px; /* W3C */
}You can see a number of vendor prefixed properties (and that is by no means an exhaustive list), each with their own unique prefix, for example, -webkit- for Webkit based browsers, -ms-
is the Microsoft prefix...