>FireFox may be enumerating and using the Windows registered file types stored in the Registry. There is some information at http://www.awitness.org/delphi_pascal_tutorial/source4/registry_associated_applications.html .
>
>You can also Google [windows registered file types enumerate].

Thanks, Firefox returns "Microsoft Word 97 - 2003 Document" but in the Windows Registry, it's "Word.Document.8". So, I guess Firefox does not rely on the Windows Registry to return the registered file types known as. It probably has something on its own. In this case, the explanation is much better. So, this is the kind of enumeration I would like to obtain. I will keep looking for a list with most commonly used file type enumerations.

BTW, while at it, I found a bug in Firefox. With the above type, this goes off the dialog as the text is too large.