css - Two media queries, same stylesheet, both work on Chrome, only on Firefox -

i have started designing media queries responsive design of page. have written 2 media queries follows:

      @media screen ,        (min-device-width : 320px)and        (max-device-width : 480px) {         #logintable {           margin-left: 27%;         }          .slider-wrapper {           margin-left: 23%;           margin-top: 5%;           width: 52%;           }          .descriptiontext1 {           margin-left: 12%;           font-size: 59%;           margin-top: 13%;          }         .header {          margin-bottom: 4%;         }        .descriptiontext2 {           margin: 5% 0px 15% 12%;           font-size: 61%;         }    }       @media screen ,       (min-device-width : 768px) ,       (max-device-width : 1024px) {        #logintable {           border-color: rgb(204, 24, 24);            margin-top:2%;            margin-left: 2%;         }        .slider-wrapper {            margin-left: 47%;            margin-top: -31%;        }          .descriptiontext1 {           margin-left: 4%;        }         .descriptiontext2 {            margin: 1% 0px 0px 4%;           }  } 

both media queries working fine on chrome, first media query not working on firefox, whereas second query gives output expected on firefox. tried using hacks first media query,

               <style>                  @-moz-document url-prefix() {                      <link rel="stylesheet" type="text/css"               href="css/responsive.css">                   }                </style> 

but second query works fine on chrome firefox without hacks. guess hack not solution. please help.

thanks