删除firefox复选框边框

Question

问题是： 如何在FireFox中删除该边框？

在Google Chrome上运行时，没问题

＆＃13;

＆＃13;

input[type="checkbox"],
input[type="radio"] {
  -webkit-appearance: none;
  -moz-appearance: none;
  box-sizing: borer-box;
  width: 15px;
  height: 15px;
  cursor: pointer;
}

input[type="checkbox"] {
  background: url(//i.imgur.com/qBOXbpe.png) left top no-repeat;
}

input[type="radio"] {
  background: url(//i.imgur.com/qBOXbpe.png) -30px top no-repeat
}

input[type="checkbox"]:checked {
  background: url(//i.imgur.com/qBOXbpe.png) -15px top no-repeat;
}

input[type="radio"]:checked {
  background: url(//i.imgur.com/qBOXbpe.png) -45px top no-repeat;
}

input[type="checkbox"]:focus {
  outline:none;
}

＆＃13;

<input type="checkbox" />

＆＃13;

＆＃13;

＆＃13;