下拉列表在Firefox移动浏览器上显示不同

Question

我有一个网站，我在Firefox Mobile样式上有问题。问题是我的下拉菜单，这些菜单在所有浏览器上都正确显示为列表，但在Firefox Mobile上显示了下拉列表中的所有条目。代码相同！

请从我的手机上找到附有的2个屏幕截图(左侧是在Chrome上，这是正确的，而右边是Firefox(。比较图片：Chrome Mobile vs. Firefox Mobile

<div class="multiselect-box clearfix">
    <select name="job_sector[]" id="job_sector1" multiple="multiple" size="15">
        <option value="Agriculture, Food and Natural Resources">Agriculture, Food and Natural Resources</option>
        <option value="Architecture and Construction">Architecture and Construction</option>
        <option value="Arts, Audio/Video Technology and Communications">Arts, Audio/Video Technology and Communications</option>
        <option value="Business Management and Administration">Business Management and Administration</option>
        <option value="Education and Training">Education and Training</option>
        <option value="Finance">Finance</option>
        <option value="Government and Public Administration">Government and Public Administration</option>
        <option value="Business Analyst">Business Analyst</option>
        <option value="Human Resource">Human Resource</option>
        <option value="Health Science">Health Science</option>
        <option value="Hospitality and Tourism">Hospitality and Tourism</option>
        <option value="Information Technology">Information Technology</option>
        <option value="Law, Public Safety, Corrections and Security">Law, Public Safety, Corrections and Security</option>
        <option value="Manufacturing">Manufacturing</option>
        <option value="Marketing, Sales and Service">Marketing, Sales and Service</option>
        <option value="Science, Technology, Engineering and Mathematics">Science, Technology, Engineering and Mathematics</option>
        <option value="Transportation, Distribution and Logistics">Transportation, Distribution and Logistics</option>
    </select>
</div>

Answer 1

<div class="multiselect-box clearfix">
  <select name="job_sector[]" id="job_sector1" multiple="multiple" size="15">
  <option value="Agriculture, Food and Natural Resources">Agriculture, Food and Natural Resources</option>
                                                                      <option value="Architecture and Construction">Architecture and Construction</option>
                                                                      <option value="Arts, Audio/Video Technology and Communications">Arts, Audio/Video Technology and Communications</option>
                                                                      <option value="Business Management and Administration">Business Management and Administration</option>
                                                                      <option value="Education and Training">Education and Training</option>
                                                                      <option value="Finance">Finance</option>
                                                                      <option value="Government and Public Administration">Government and Public Administration</option>
                                                                      <option value="Business Analyst">Business Analyst</option>
                                                                      <option value="Human Resource">Human Resource</option>
                                                                      <option value="Health Science">Health Science</option>
                                                                      <option value="Hospitality and Tourism">Hospitality and Tourism</option>
                                                                      <option value="Information Technology">Information Technology</option>
                                                                      <option value="Law, Public Safety, Corrections and Security">Law, Public Safety, Corrections and Security</option>
                                                                      <option value="Manufacturing">Manufacturing</option>
                                                                      <option value="Marketing, Sales and Service">Marketing, Sales and Service</option>
                                                                      <option value="Science, Technology, Engineering and Mathematics">Science, Technology, Engineering and Mathematics</option>
                                                                      <option value="Transportation, Distribution and Logistics">Transportation, Distribution and Logistics</option>                                                              
  </select>
</div>

.responsive-mobile-filter .slider-bar-color {
  background-color: #edf3f5;
}
#responsive-mobile-filter .filter-title {
  padding: 5px 10px 15px;
}
#responsive-mobile-filter .filter.shadow {
  padding: 0 10px;
  background-color: #fff;
}
#responsive-mobile-filter .box .multiselect-box select {
  border: 1px solid #c4c4c4;
  background-color: #fff;
  width: 100%;
}
#responsive-mobile-filter .box .multiselect-box select option {
  background-color: #f6f6f6;
  /* border: 1px solid #c4c4c4; */
  margin: 2px 0;
  padding: 5px 10px;
  box-sizing: border-box;
  font-size: 13px;
}
#responsive-mobile-filter .box .multiselect-box #job_sector1 option {
  padding: 5px 0px;
}
.filter form {
  float: left;
  width: 100%;
}
.text-right .btn.job-btn {
  margin-bottom: 10px;
}
.fixed .text-right .btn.job-btn {
  margin-left: 15px;
}