Using the object {data}, you can access everything regarding the Content Element (containing the FlexSlider Plugin):
<table>
<tr>
<thcolspan="2">cObject Data Array</th>
</tr>
<tr>
<td>data.uid</td>
<td>The Uid</td>
</tr>
<tr>
<td>data.pid</td>
<td>Page ID containing this Content Element</td>
</tr>
<tr>
<td>data.sys_language_uid</td>
<td>ID of the records language
</tr>
</table>
And, of course, many more. Just use the Debug Viewhelper to get a clue about other variables:
<f:debug>{data}</f:debug>
### Accessing Extension Configuration
Using the object {configuration}, you cann access all options from the Extension Configuration, defined through Extension Manager (stored in the localconf.php):
<table>
<tr>
<thcolspan="2">Extension Configuration</th>
</tr>
<tr>
<td>extendSubtitleByRTE</td>
<td>Boolean - defines whether the subtitle is an RTE or not; if it is, it can contain HTML</td>