Firefox is not supporting position relative on display table-cell. Here's what I've tried:
HTML
<section class="lightOrangeStrip">
    <i class="icon-Chart"><img src="images/chart.png" alt="chart-icon" /></i>
    <div class="orangeContainer">
        <h4>Our Promise To You:</h4>
        <ul>
            <li>Deliver Quality, On Time Solutions</li>
            <li>Develop A Strong Long Term Business Relationship</li>
            <li>Help Your Business Grow By Reducing Any IT Overhead</li>
            <li>Ample List Of Services</li>
            <li>Tools To Help You Manage Your Client Account More Efficient</li>
        </ul>
    </div>
</section> 
CSS
.lightOrangeStrip {
    width:50%;
    display:table-cell;
    vertical-align:top;
    margin:0 -3px;
    background:#f0b856;
    color:#fff;
    padding:25px 10px 25px 80px;
    position:relative;
    border-bottom:solid 1px #fff;
}
.stripWrap {
    width:100%;
    display:table;
    position:relative;
}
.lightOrangeStrip .icon-Chart {
    position:absolute;
    left:-74px;
    top:20%;
    height:54px;
    width:54px;
}
What's wrong?
 
     
    