Even when you create a new folder with name "mozilla" delete it, so that the folder can still be found in trash, create a new folder named "mozilla" and try to delete it too, you will also get the message "A folder with that name already exists.".
Even when you create a new folder with name "mozilla" delete it, so that the folder can still be found in trash, create a new folder named "mozilla" and try to delete it too, you will also get the message "A folder
with that name already exists.".