Firefox 3.6 allows you to do more with CSS backgrounds: you can use gradients, set a background size, and specify multiple backgrounds. Custom Background Size In Firefox 3.6, you can specify the size of a background image to scale it as a percentage of the element’s size, or to a specific length, using -moz-background-size. -moz-background-size: [, ]* Percentages. In this example, you can see the
![css backgrounds in Firefox 3.6 – Mozilla Hacks - the Web developer blog](https://cdn-ak-scissors.b.st-hatena.com/image/square/8f043099b608abf8384b24171faa177d3698e62e/height=288;version=1;width=512/https%3A%2F%2Fhacks.mozilla.org%2Fwp-content%2Fthemes%2FHax%2Fimg%2Fhacks-meta-image.jpg)