Firefox not using position:relative with table-cell - css

Question

I am having a problem with firefox, using position relative on a div that has been given a display of table-cell, firefox is ignoring the position relative so my absolutely positioned elements inside the table cell are not showing correctly. You can see my example page at: http://dev.aaronpitts.ch/lhc/ it works fine in webkit etc so you can see what I am trying to achieve. Trying this did not help: http://wisercoder.com/firefox-displaytable-cell-and-absolute-positioning/
My affected code is:
<div class="css-table">
<article id="crystallization">
<h2><i class="fa fa-arrow-circle-o-right icon-margin-r"></i> Crystallisation</h2>
<div class="service-hover">
<p>1) A comprehensive approach , from conceptualization & development through to realization</p>
<p>2) ^^ for global/hospitality projects</p>
<p>3) Our full range of services provide unique knowledge on the management of hospitality professionals, securing sustainable returns for your investments</p>
</div>
</article>
<div class="cell-space"></div>
<article id="consulting">
<h2><i class="fa fa-arrow-circle-o-right icon-margin-r"></i> Consulting</h2>
<div class="service-hover">
<p>1) Extensive industry experience and knowledge, combined with the ability to listen</p>
<p>2) Our integrative product offering provides you with innovative solutions that meet your specific needs</p>
</div>
</article>
</div>
And the css:
.css-table {
display: table;
width: 100%;
}
#management-consulting article {
background-size: cover;
background-position: center center;
position: relative;
}
#management-consulting article a {
position: absolute;
left: 0;
top: 0;
right: 0;
bottom: 0;
z-index: 2000;
}
#management-consulting article:hover h2 {
opacity: 0;
-webkit-transition: all 0.5s ease-in-out;
-moz-transition: all 0.5s ease-in-out;
-o-transition: all 0.5s ease-in-out;
transition: all 0.5s ease-in-out;
}
#management-consulting article h2 {
background: rgba(0, 0, 0, 0.7);
padding: 20px;
position: absolute;
color: #FFF;
font-weight: 200;
text-transform: none;
}
#crystallization {
width: 60%;
display: table-cell;
background-image: url(../img/crystallization.jpg);
height: 400px;
}
#crystallization h2 {
bottom: 30px;
right: 30px;
}
.cell-space {
width: 2%;
display: table-cell;
}
#consulting {
width: 35%;
background-image: url(../img/consulting.jpg);
display: table-cell;
}
#consulting h2 {
top: 30px;
left: 30px;
}
.service-hover {
opacity: 0;
background: rgba(0, 0, 0, 0.7);
padding: 30px;
position: absolute;
left: 0;
top: 0;
right: 0;
bottom: 0;
font-family: "ff-dagny-web-pro",sans-serif;
font-style: normal;
font-weight: 200;
font-size: 20px;
font-size: 1.25rem;
color: #FFF;
}
#management-consulting article:hover .service-hover {
opacity: 1;
-webkit-transition: all 0.5s ease-in-out;
-moz-transition: all 0.5s ease-in-out;
-o-transition: all 0.5s ease-in-out;
transition: all 0.5s ease-in-out;
}

Answer 1

Gecko doesn't support table-cells being absolute containing blocks at the moment. See https://bugzilla.mozilla.org/show_bug.cgi?id=63895
Note that the relevant spec text here is at http://www.w3.org/TR/CSS21/visuren.html#choose-position and says:
The effect of 'position:relative' on table-row-group, table-header-group, table-footer-group, table-row, table-column-group, table-column, table-cell, and table-caption elements is undefined.