我正在background-image為一個(gè)偽元素設(shè)置一個(gè)SVG ：content: '';position: absolute; right: 0;bottom: 0;  left: 0;width: 100%;height: 12px;background-image: url('data:image/svg+xml;utf8,<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" viewBox="0 0 620 12" enable-background="new 0 0 620 12" xml:space="preserve"><g><polygon fill="#D11A3C" points="48.8,12 0,12 0,0 54.1,0"/><polygon fill="#952592" points="93.8,12 44,12 49.3,0 99.1,0"/><polygon fill="#1E65AF" points="133.5,12 83.7,12 89,0 138.8,0"/><polygon fill="#D11A3C" points="156.3,12 106.5,12 111.8,0 161.6,0"/><polygon fill="#40BFC2" points="201,12 151.3,12 156.5,0 206.3,0"/><polygon fill="#1E65AF" points="216.4,12 166.6,12 171.9,0 221.7,0"/><polygon fill="#952592" points="226.5,12 176.7,12 182,0 231.7,0"/><polygon fill="#1E65AF" points="241.3,12 191.5,12 196.8,0 246.6,0"/><polygon fill="#40BFC2" points="260.9,12 211.1,12 216.4,0 266.2,0"/><polygon fill="#952592" points="282.6,12 232.9,12 238.1,0 287.9,0"/><polygon fill="#952592" points="282.6,12 232.9,12 238.1,0 287.9,0"/><polygon fill="#D11A3C" points="318.6,12 268.9,12 274.2,0 323.9,0"/><polygon fill="#D11A3C" points="318.6,12 268.9,12 274.2,0 323.9,0"/><polygon fill="#40BFC2" points="364.2,12 314.4,12 319.7,0 369.5,0"/><polygon fill="#1E65AF" points="368.1,12 318.3,12 323.6,0 373.4,0"/><polygon fill="#1E65AF" points="368.1,12 318.3,12 323.6,0 373.4,0"/><polygon fill="#D11A3C" points="378.5,12 328.7,12 334,0 383.8,0"/><polygon fill="#D11A3C" points="378.5,12 328.7,12 334,0 383.8,0"/><polygon fill="#40BFC2" points="424.8,12 375,12 380.3,0 430.1,0"/><polygon fill="#40BFC2" points="424.8,12 375,12 380.3,0 430.1,0"/><polygon fill="#952592" points="430.1,12 380.3,12 385.6,0 435.4,0"/><polygon fill="#1E65AF" points="465.6,12 415.8,12 421.1,0 470.9,0"/><polygon 但出于某種原因，它并沒有出現(xiàn)在Firefox上。我不想使用base64 data-url。這在Firefox中根本不可能嗎？