2008-02-23 CSS - background-size Currently, support for background-size is limited to Safari 3 and Opera 9.5. And in order to use the property in those browsers, proprietary CSS property values need to be used: -o-background-size and -webkit-background-size. 例示には -khtml-background-size というのも書かれてあるけど、Konqueror はどうだったかな。 CSS 3 The 'background-size' property