Rated 4 out of 5 stars

Great extension.

However I found a couple of annoyances:
- If "prompt for filename" is checked, and the filename dialog is canceled or closed, it creates a shorcut with blank name instead of canceling the whole shortcut creation process... I think it should cancel, and only create the blank name shortcut after OK with the filename field empty (as also actually do).
- If the filename dialog is horizontally expanded, the filename field is not expanded with it.

Also I suggest to add an autohiding notification bar https://developer.mozilla.org/en-US/docs/XUL/notificationbox as an intermediate attention requesting alert between the alert dialog box, and the absence of alerts.
Last, I've sent a locale to the email adress you show in http://deskcut.mozdev.org for you to add it.

(FF 18.0a1 32bit on win)