Comment 2 for bug 354380

This has nothing to do with nautilus (I don't know what nautilus can or can't do).

The problem is the gtk file dialog is very limited. In thunderbird, there is only one filter available (All files) which cannot be changed by the user. The user cannot sort by extension or by "File type". The user cannot search by part of the filename (e.g., "jpg"). In my user case above, the user will have to change to other application to find the desired file and then either drag&drop or write down the name of the file and search.

Another usercase: the user only wants to attach images in a directory with various types of files and similar names. It gets much worse if the files have very long names (so one cannot see the extension).