Chart displays fine in IE and Chrome, uses all available screen width. But in Firefox, it does not, using instead a too-small computed value for width. Here is the HTML code…
<div style=" position: absolute; top: 50px; left: 145px; ">
<div id='jqxExpander' style="margin-right: auto; margin-left: auto; margin-bottom: 5px; margin-top: 5px; ">
<div style="width: 97%";">
<table style="font-size: 85%; color:white;">
<tr>
<td> Chart:</td>
<td style="font-size: 125%;" width="99%" align="center" nowrap><b> INSTALLED BASE BY APP, CURRENT SHARE </b></td>
<td align="right" nowrap> Usage Tips</td>
</tr>
</table>
</div>
<div >
<ul>
<li>Hover over any pie slice to see its details.</li>
<li>You can also click the Legend (top left) to toggle the display of any slice.</li>
<li>A maximum of 20 slices are displayed. For smaller slice data, use the corresponding Grid. </li>
</ul>
</div>
</div>
<div style="width: 100%;">
<div id='chartContainer' style=" height:80vh; width:99%"></div>
</div>
</div>