このペンを見てください: Firefox 21 のhttp://codepen.io/helloworld/pen/BAEcp角が丸い div には、Chrome 27 や IE10 にはないギャップがあります。
そのギャップは何ですか?roundArea クラスを削除し、高さのパーセント値を他の div の 1 つに追加して合計 100% を取得すると、ギャップが削除されます。
<div id="chartBody">
<div style="border:black solid 1px;">
<figure>
<div class="push-center" style="height:25%;">1th test</div>
<div class="push-center" style="height:50%;">2nd test</div>
<div class="push-center" style="height:25%;">3rd test</div>
</figure>
<figcaption>
<div class="push-center"></div>
</figcaption>
</div>
<div>
<figure>
<div class="push-center roundedArea" style="background-color:#fff;height:22%;"></div>
<div class="push-center diagram" style="background-color:#ff99cc;height:11%;">3</div>
<div class="push-center diagram" style="background-color:#ff33cc;height:44%;">44</div>
<div class="push-center diagram" style="background-color:#ff66cc;height:23%;">36</div>
</figure>
<!-- data-bind="text: title" -->
<figcaption>
<div class="push-center">ak</div>
</figcaption>
</div>
</div>
<div id="chartFooter">
<div class="push-center">tests</div>
<!-- foreach: denies -->
<!-- data-bind="text: deny" -->
<div class="push-center">6</div>
</div>
body, html,figure,figcaption{
width:100%;
height:100%;
margin:0;
padding:0;
font-family:arial;
}
*{ /* Every element which has a border or padding value puts this value inside the div */
box-sizing:border-box;
-moz-box-sizing:border-box;
}
.push-center
{
display: -webkit-box;
display: -moz-box;
display: -ms-flexbox;
display: -webkit-flex;
display: flex;
-webkit-box-pack: center;
-moz-box-pack: center;
-ms-flex-pack: center;
-webkit-justify-content: center;
justify-content: center;
-webkit-box-align: center;
-moz-box-align: center;
-ms-flex-align: center;
-webkit-align-items: center;
align-items: center;
width:100%; /* FF fix */
text-align:center; /* FF fix */
}
#chartBody{
background-color:white;
height:90%;
}
.roundedArea{
border-radius: 5px;
border: gray dashed 1px;
}
.clear{
clear:both;
}
.diagram
{
color:white;
font-weight:bold;
border-bottom:white solid 1px;
}
figcaption div{
text-transform:uppercase;
height:100%;
}
figcaption{
height:10%;
}
figure {
height:90%;
}
#chartBody > div {
height:100%;
float:left;
}
#chartBody > div:nth-of-type(1), #chartFooter > div:nth-of-type(1)
{
margin-left:10px;
}
#chartBody > div:nth-of-type(n+1), #chartFooter > div:nth-of-type(n+1)
{
width:80px;
margin-right:20px;
}
#chartBody > div:nth-of-type(2) ~ div, #chartFooter > div:nth-of-type(2) ~ div
{
width:40px;
margin-right:10px;
}
#chartFooter{
padding-top:5px;
height:10%;
border-top:#000 solid 1px;
}
#chartFooter div{
float:left;
}
ギャップについては、この画像を参照してください。