I'm not sure if this forum is the correct place to start this conversation. Let me know if there is a more appropriate location. Anyway, some applications such as Gimp show an image preview in a pane on the right side of the file->open window. It would be nice to have this feature on the Firefox upload window. Currently, when uploading an image with Firefox, there are only small thumbnails to help identify files. This makes it rather difficult to sift through large directories of image files. In Ubuntu, which uses gtkfilechooser, I think it is the responsibility of the initiating program to invoke the preview feature. Some key words of note(that I do not understand) are gtk_file_chooser_set_preview_widget, gtk_file_chooser_get_preview_widget, gtk_file_chooser_set_preview_widget_active, gtk_file_chooser_get_preview_widget_active. I am new to Firefox/Linux and don't have the skills to make this improvement. Any help with this issue will be greatly appreciated. Thank You.