Browser Media Queries

target_firefox.css

@-moz-document url-prefix() { 
  // css goes here
}

target_ie_9-10.css

@media screen and (min-width:0\0) {
    // css goes here
}

target_opera.css

@media all and (-webkit-min-device-pixel-ratio:10000), not all and (-webkit-min-device-pixel-ratio:0) {
 
   // css goes here
 
}

target_webkit.css

@media screen and (-webkit-min-device-pixel-ratio:0) {
     /* put webkit CSS here*/
}