网站变灰代码 兼容火狐浏览器的把网页变灰代码让网页变黑白

/* 网站变灰代码 */

html{   filter: grayscale(100%);    -webkit-filter: grayscale(100%);    -moz-filter: grayscale(100%);   -ms-filter: grayscale(100%);    -o-filter: grayscale(100%); filter: url("data:image/svg+xml;utf8,<svg xmlns=\'http://www.w3.org/2000/svg\'><filter id=\'grayscale\'><feColorMatrix type=\'matrix\' values=\'0.3333 0.3333 0.3333 0 0 0.3333 0.3333 0.3333 0 0 0.3333 0.3333 0.3333 0 0 0 0 0 1 0\'/></filter></svg>#grayscale");  filter:progid:DXImageTransform.Microsoft.BasicImage(grayscale=1);   -webkit-filter: grayscale(1);}