With the new update of THRON, source file extensions are visible in the Dashboard interface:

More specifically, they are visible:

• In the content list in both views (wall on hover)
  
  

• In the upper left corner of the content detail (preview, edit space, shareboard, history, intelligence)
  
  
  

• In the list of content's versions
  
  
  

In addition, the information about the original file extension can be used as a filter to retrieve content from the list. Clicking on the "type" filter will display a set of checkboxes which correspond to the most used file extensions. The text field (which offers autocompletion on file extensions) allows you to add more options to the filter list.