CSS样式的box-vertical在Mozilla Firefox中不起作用

Question

我需要限制div中的文本

<div class="blog">
    <div class="col-xs-12 col-sm-6 col-lg-6 col-md-6 nopadding">
        <img src="assets/experience-in-vizag.png">
    </div>
    <div class="col-xs-12 col-sm-6 col-lg-6 col-md-6 blog-content">
        <h3 class="capitalize">A Day In Vizag</h3>
        <p>As Vizag is located on the hilltop it’ll take nearly one hour to reach there. Now, if you’re new to Vizag and do not know Telugu, it’s best to go with the 1 day Vizag tourist package by AP Tourism.Vizag also has sundry hills and beaches to provide. </p>
        <div class="col-xs-8 col-lg-9 col-sm-8 col-md-9 author-details-row">
            <p class="author-details">
                Arun Kumar
                <span class="date">November 28, 2017</span>
            </p>
         </div> 
    </div>
</div>

以下是我使用的CSS。如果我删除-moz-box-orient: vertical; CSS规则，则它在Chrome浏览器中正常运行

`blog-content p {
   font-size:14px;
   overflow: hidden;
   display: -moz-box;
   display: -webkit-box;
   display: box;
   line-clamp: 7;
   -webkit-line-clamp: 7;
   -moz-box-orient: vertical;
   -webkit-box-orient: vertical;
   box-orient: vertical;
   line-height: 19px; 
   color: #666666; 
   padding-right:14px;
}`