What you get when dragging with Firefox depends on the content. Sometimes you'll get a URL (with a long name that is difficult to delete) and sometimes you'll get a file. I can recreate the URL issue if the web item is a base64 encoded image. Chrome ...
This should have hundreds of up-votes. The current behavior of saving as a URL causes grief for unsuspecting users. They expect to get a file when dragging to a folder.
